 Brief CV
 Research Areas
 Teaching Expertise
 Research Supervision
 Projects Undertaken
 Publications
 INVITED TALKS
 Academic Activities
 Awards/ Memberships
o Education
 Ph.D. Mathematics (1986), Department of Applied Mathematics, Institute of Technology, Banaras Hindu University, Varanasi, India.
 Thesis Title: Some Investigations on Fixed Point Point Theory in Metric, Banach and Hilbert Spaces and Their Applications.
 M.Sc. Mathematics (1980), Department of Mathematics, Banaras Hindu University, Varanasi.
 B.Sc. Mathematics (1978), Faculty of Science, Banaras Hindu University, Varanasi.

Academic Positions held

 Lecturer, Department of Mathematics, PU College, NEHU, Aizawl (19851994).
 Reader, Department of Mathematics, Assam Central University, Silchar (Nov 1994 to Sept 2002).
 Professor, Department of Mathematics, Assam Central University, Silchar (Nov 2002 to Nov 2007).
 Professor, Department of Applied Mathematics, Institute of Technology, Banaras Hindu University, Varanasi (Nov 2007 to June 2012).
 Professor, Department of Mathematical Sciences, Indian Institute of Technology (Banaras Hindu University), Varanasi, India since June 2012.
o Research
 Doctoral, Institute of Technology, Banaras Hindu University, Varanasi, India during July 1981 – Sept 1985.
 Senior Research Fellow (CSIR), Institute of Technology, Banaras Hindu University, Varanasi, India during Aug 1983 – Sept 1985.
 Fixed Point Theory
 Fuzzy Set Theory
 Soft Computing Techniques
 Image Processing
 Mathematical Modelling
 Optimization
Courses Offered at IIT (BHU)
Engineering Mathematics I, Real Analysis, Functional Analysis, Numerical Analysis, Operations Research, Number Theory, Discrete Mathematics, Fuzzy Set Theory and Soft Computing.
Courses taught at Assam Central University
Real Analysis, Measure Theory, Functional Analysis, Topology, Numerical Analysis, Operations Research, Number Theory
 Ten scholars are awarded Ph. D. degree in the areas of Fixed Point Theory, Optimization, Mathematical Modelling, Image Processing, Soft Computing Techniques since 2008.
 Three scholars have submitted their thesis and another five scholars are working.
 Nine students have completed their M Tech dissertations since 2012.
 Two scholars have done M Phil dissertaions at AU, Silchar.
Name of Project  Sanction Year 
Completion Year  Total Cost of Project  Sponsoring Agency  PI / CoPI 
Fractional calculus approached solutions for two dimensional ground water contaminations in unsatur ated media”  2014  March 2018 (Ongoing)  Rs. 22,95,750/  Board of Nuclear Science (BRNS), BARC, Govt. of India  CoPI 
Optimization of Agricultural products of Cachar 
1995  1996  Rs. 25000/  Assam University, Silchar  PI 
Fixed Point Theory in Metric, Banach and Hilbert Spaces and their Applications  Aug 83  Sept 85  Rs. 24700/ (SRF) 
CSIR, New Delhi  PI 
o Fixed Point Theory
 Some generalizations of a fixedpoint theorem of Khan (with RNM), Bull. Tech. Univ. Istanbul, 36(1983), no.2, 201211.
 A generalization of a fixedpoint theorem of Jaggi (with RNM), Indian J. Pure Appl. Math. 14(5) (1983), 57274.
 Fixed point theorems in Lspace (with RNM), Indian J. Pure Appl. Math. 14(5) (1983), 635640.
 A fixedpoint theorem in generalized Hillbert space (with RNM), Indian J. Pure Appl. Math. 14(7) (1983), 930933.
 On some fixedpoint theorems for generalized multivalued mappings(with RNM), Indian J. Pure Appl. Math. 14(12) (1983), 15061509.
 Generalization of Leader’s fixed point principle (with RNM), Bull. Austral. Math. Soc. 29(1984), 349356.
 Solution of simultaneous equations in Hausdorff space and a common fixed point theorem (with RNM), Bull. Cal. Math. Soc. 76(1984), 231235.
 An application of Meyer’s theorem on converse of Banach’s contraction principle (with RNM), Bull. Inst. Math. Acad. Sinica, 12(1984) (3), 253255.
 Construction of fixed points of strictlypseudo contractive mappings in a generalized Hilbert space and related applications (with RNM), Indian J. Pure Appl. Math. 15(11) (1984), 11831189.
 A note on an application of a fixed point theorem in approximation theory (with RNM), Indian J. Pure Appl. Math. 16(1984), 243244.
 A note on fixed point theorems for some nonlinear mappings (with RNM), Math. Chronicle. 13(1984), 5962.
 On fixed point theorems for mappings on a metric space involving several points of the space (with RNM), Bull. Tech. Univ. Istanbul. 37(3)(1984) 313322.
 Some results on unique fixed points for mappings on Hausdorff space (with RNM), Communications, 33 (1984), 215223.
 Some fixed point theorems on metric and Banach spaces, Indian J. Pure Appl. Math. 16(6) (1985), 575585.
 On mappings whose powers are contractions on a metric space (with RNM), Communications, 34(1985), 1723.
 A common fixed point theorem for two nonself mappings (with RNM), Proc. Nat. Acad. Sci. (India), (56)(A)(1986), 230233.
 A common fixed point theorem for weakly commuting mappings (with S Sessa& RNM), Math. Japonica, 31(2) (1986), 235245.
 An abstract fixed point principle for Koperators on cone valued metric spaces, Pure Math. Manuscript, 5(1986), 5158.
 A common fixed point result for asymptotically regular mappings, Jour. Math. Phy. Sci. 20(6) (1986), 517523.
 Some fixed point results for singlevalued mappings on a metric space, Ganita, 38(1987), 1120.
 On Phimonotone operators and variational inequalities (with RNM), Bull. Cal. Math. Soc. 80(1988), 401405.
 Some results on generalized contractive modulii of a pair of operators (with RNM), Proc. Nat. Acad. Sci. (India) 58(1988), 393398.
 Nonlinear mappings in metric and Hausdorff spaces and their common fixed point, Kyungpook Math J. 28(1) (1988), 97106.
 Some fixed point theorems for fuzzy mappings (with RNM), Fuzzy Sets and Systems, 33(1989) 213219.
 Common fixed point theorems for asymptotically commuting mappings in uniformly convex Banach spaces, Indian Jour. Math. 31(2) (1989), 193200.
 Some results on generalized nonlinear contractions through abstract cones, Ganita, 40(1989), 4145.
 On weak convergence to fixed point of a generalized asymptotically non expansive map (with RNM & VV), Publ. Del. Inst. Math. 45(59) (1989),179183.
 Fixed point principle for Koperators on cone valued metric spaces, Pure Math. Manuscript, 8(1989), 1929.
 On common fixed points of nonlinear mappings in certain Banach Lattices (with RNM & VV), Bull. Cal. Math. Soc, 82(1990) (1), 13.
 Fixed point of condensing multivalued mappings, Pure Math. Manuscript, 9(199091), 181186.
 An extension of a fixed point theorem of Achari, Ganita, 42(1991), 5964.
 Some fixed point results for quasi and generalized non expansive mappings, J. AssamUniv. 2(1) (1997), 185188.
 Some convergence principles and fixed point theorems, Ganita, 48(2) (1997), 121124.
 On the theory of fixed point in metric space, Math. Forum, 12 (1998), 1118.
 Convergence of modified Mann type of iterates and fixed point, Proc. Nat. Acad. Sci.(A) (India), 70(2000), 185189.
 Some fixed point theorems on conevalued Lspaces and spaces with conevalued 2metric, Ganita 51(2000), 127134.
 Some results on common fixed points, Bull. GUMA, 6(2000), 6571 (published in Nov 2002).
 Few common fixed point results for compatible mappings. Bull. Cal. Math. Soc.95(4) (2003), 307312.
 Some fixed point results in 2Banach space, Internat. Jour. Math. Scs. 4(2) (2005), 323328.
 Some results on common fixed point in fuzzy metric spaces, Soochow Journal of Mathematics33(4)(2007), 553561.
 A common fixed point for three self maps using compatibility (with AC), Jour. Tripura Math. Soc. 11(2009), 16.
 Some common fixed point results for compatible mappings (with AC),Proc. Math. Soc., BHU 25(2009),1721.
 Some common fixed point results for a pair of self maps under weak compatibility condition (with AC), Inter. Jour. Math. Sci.& Engg. Appl. 4(5)(2010), 249261.
 2Banach space and some fixed point results (with AC), Jour. Indian Acad. Math. 33(2) (2011), 411418.
 Some study on the theory of fixed points in metric space (with AC), Jour. Internat. Acad. Phy. Sci. 15(2) (2011), 141152.
 Two common fixed point results in fuzzy metric spaces (with BSC & KDas), Internat. Review of Fuzzy Math. 6(1) (2011), 2132.
 Compatible mappings and somecommon fixed point results (with AC),American Journal of Mathematics and Statistics1(1)(2011), 1720. (doi: 10.5923/j.ajms.20110101.03)
 Generalized conditional convergence and common fixed point principle for operators on metric spaces (with LK),Internat. Math. Forum, 7(2) (2012), 5764. (Impact factor: 0.2)
 Common fixed points for two self maps under strongly partially commuting condition (with AC), J. Adv. Res. Pure Math. (USA)4(2) (2012), 2131.
 Common fixed point results for family of mappings under tweak reciprocal continuity (with BSC, AK and LK), Annali dell' Università di Ferrara (appeared online in 2012)DOI 10.1007/s1156501201673.
 Extension of Caristi's Theorem to Cone Metric Space (with LK& NM), International Journal of Functional Analysis, Operator Theory and Applications, 4(2)(2012), 97107.
 Some fixed point results in 2metric spaces (with AC),American Journal of Mathematics and Statistics,2(6)(2012),213216. (doi: 10.5923/j.ajms.20120206.08)
 Common fixed point results for weakly commuting maps and mappings under strict inequality condition (with AC), Advances in Applied Research, 4(2) (2012), 126130.
 Common Fixed Point Results in Cone Metric SpacesUsing Altering Distance Function (with LK), American Journal of Mathematics and Statistics, 2(6)(2012), 217220. (doi: 10.5923/j.ajms.20120206.09)
 Fixed and coincidence point results on metric space (with AC), International Journal of Advanced Scientific and Technical Research, 4(2) (2012), 543554.
 The point of coincidence and common fixed point results in cone metric space (with BSC, LK& NM) Advances in Fixed Point Theory, 3(1) (2013), 7792.
 Few common fixed point results for weakly commuting mappings (with AC), J. Math. Comp. Sci. 6(1) (2013), 2735.
 Some fixed point results for asymptotically commuting mappings in uniformly convex Banach space, Bull. Cal. Math. Soc. 105(1)(2013), 5966.
 An αfixed point theorem in complete metric spaces with ordering by iterations (with AC, BSC & AK), Universal Journal of Computational Mathematics, 2(2)(2014),2831.(DOI:10.13189/ujcmj.2014.020202).
 A unique common fixed point result in cone metric spaces under generalized altering distance functions (with LK), Asian Journal of Mathematics and Applications, Vol 2014, Article ID ama0133, 9 pages. (Glogal IF: 0.453)
 A weak contraction principle in partially ordered cone metric space with three control functions (with BSC, NM & LK), International Journal of Analysis and Applications, 6(1)(2014), 1827.
 A fixed point principle for a pair of noncommutative operators (with PPM and EK), Advances in Fixed Point Theory, 4(4)(2014), 525531.
 Existence of best proximity points in regular cone metric spaces (with LK), Azerbaijan Journal of Mathematics, 5(1)(2015), 4453.
 Common fixed point results for weakly commuting maps by alternating distances(with AC), South East Asian J. of Math. & Math. Sci.11(2)(2015), 123132.
 Fixed points for quasi contraction maps on complete metric spaces (with AC), Jour. Math. & Comp. Sci. 16(1)(2016)2632.
 Multivalued fixed point results and stability of fixed point sets in metric spaces (with BSC, NM & CB), Facta Universitatis, Series: Mathematics and Informatics, 30 (4) (2015), 501512.
o Fuzzy Set Theory and Image Processing
 On soft relation and fuzzy soft relation, Jour. Fuzzy Mathematics, 16(3)(2008), 677687.
 Noise erosion and segmentation of line from handwritten document (with SS), Assam Univ. Jour. Sc. & Tech. 3(1) (2008), 1517.
 A New Cluster Validity Index for Fuzzy Clustering, Inter. Jour. Computational Intelligence Research (with SAB & BSP), 5(4) (2009), 403428.
 Handwritten character recognition by using Neuralnetwork and Euclidean distance metric (with SS), Intern. Jour. Comp. Sci. & Intelligent Computing, 2(1) Nov. 2010, 15.
 Handwritten character recognition by using Fuzzy membership function (with SS), International Journal of Emerging Technologies in Sciences and Engineering, 5(2) (2011), 1115.
 Improving the Recognition of Handwritten Characters using Neural Network through Multiresolution Technique and Euclidean Distance Metric (with DKP & MKS), International Journal of Computer Applications, 45(6) (2012), 3850. (doi: 10.5120/67879097).
 Handwritten Character Recognition using Multiresolution Technique and Euclidean Distance Metric (with DKP, SKY & MKS), J. of Signal & Information Processing, 3(2) May 2012, 208214 DOI: 10.4236/jsip.2012.32028.
 An Approach for identification of numerals using Vector Contour (with HR), ARPN Journal of Systems and Software, 2(7) (2012), 228235.
 Handwritten Character Recognition Using Multiresolution Technique and Artificial Neural Network (with DKP), Asian Journal of Science and Technology 4(11) (2012), 2629.
 Offline character recognition using Monte Carlo method and neural network (with HR & SK), International Journal of Artificial Intelligence & Applications (IJAIA), 4(3), (2013), 2338.
 A New Method for Face Recognition using Feature Clustering with Fuzzy Parameters (with SB), J. Math. Comp. Sci.7(3) (2013), 181195.
 On Hesitant Soft Relations (with DR), International Journal of Advanced Research, 1(5) (2013), 341346.
 Recognition of Handwritten Characters Using Cosine Measure (with SS), Advances in Computational Sciences and Technology, 6(2), (2013) pp. 111119.
 An Approach for feature extraction of alphanumeric by using Snakes and Principal Component Analysis for its recognition (with HR & SK), International Journal of Artificial Intelligence and Mechatronics 2(2) (2013), 3136.
 An Automated Vehicle License Plate Recognition System (with HR & SK), IEEEComputers(August 2015),6671.
 The countability aspects of fuzzy soft topological spaces (with VT) Annals of Fuzzy Mathematics and Informatics, 9(5)(May 2015), 835842.
 Skewed Vehicular Number Plate Detection and Recognition (with HR & SK), IEEE Computers (Jan 2016), 5965.
 Fuel Assembly verification for safe operation of Nuclear Power Plants (with HR & SK),Nuclear Technology, 192 (Nov 2015),125132.(SCIIF: 0.735).
 Vehicular License Plate Localization Using Principal Component Analysis(with HR & SK), IETE Technical Review (Taylor & Francis) April 2016, 6 pages. (IF: 0.888).
 Intuitionistic Fuzzy Neighborhood Rough set Model for Feature Selection (Shivam Shreevastava, Anoop Tiwari, T Som), International Journal of Fuzzy System Applications (IJFSA) Volume 7, Issue 2 (2018).
 Tolerancebased intuitionistic fuzzyrough set approach for attribute reduction, (Anoop Tiwari, Shivam Shreevastava, T Som and K K Shukla), Expert System with Application, 101 (2018), 205212 (SCI).
 Enhanced Prediction for Pieozophilic Protein by incorporating Reduced Set of Amino Acids using FuzzyRough Feature Selection technique followed by SMOTE(Anoop Tiwari, Shivam Shreevastava, Karthikeyan Subbiah, T. Som), Communications in Computer and Information Science (accepted).(SCOPUS)
 Feature subset selection of semisupervised data: An intuitionistic fuzzyrough set based approach(Shivam Shreevastava, Anoop Tiwari, T. Som), Advances in Intelligent Systems and Computing(accepted). (SCOPUS).
o Mathematical and OR Modeling
 A step towards optimization of agricultural products in the district of Cachar, J. Assam Univ. 3 (1998), 136150.
 Difference approximations in optimal control problems with multiple cost functionals, J. Assam Univ., 5(1) (2000), 612.
 Generalized exponential and it’s applications to partial differential equations, Ganita 55(2) (2004), 161167.
 Mathematical modeling of transportation related problem of South Assam and its optimal solution (with NS), Assam Univ. Jour. Sc. & Tech. 3(1) (2008), 2227.
 Mathematical modeling of transportation related fare minimization problem of South Assam and an approach to its optimal solution (with NS), Indian Jour. Transport Management 32(3) (2008), 201208.
 Mathematical Modeling of Transportation Related Problem of South Assam with an Approach to Its optimal Solution (with NS), Assam Statistical Review, 22 (1) (2008), 5967.
 An Optimal Model for the Daily Profit of the Transporting Agency in South Assam (with NS), Jour. Tripura Math. Soc.11 (2009), 4248.
 A study of Transportation Problem for an Essential Item of Southern Part of North Eastern Region of India as an OR Model and Use of Object Oriented Programming (with NS & BS),International Journal of Computer Science and Network Security, 10(4) (April 2010), 7886.
 The Governing Equations for ElectroRheological Fluid within the Context of the Full ElectroDynamical Theory (with PB), International Journal of Applied Mathematics, 23(5) (2010), 809824.
 A Mathematical Approach to the Transportation Related Data of South Assam for the Optimal Age of Replacement of Vehicle and Daily Expenditure Minimization (with NS & BS), AJMCSR, 4(1) (2011), 617.
 Gravitational Potential of an Ellipsoidal Mass of Oblate shape at any point outside the oblate (with RC), Inter. Jour. Math. Sci. &Engg. Appl. 5 (3) (2011), 347359.
 Gravitational Potential of an Ellipsoidal Mass of Prolate shape at any point outside the prolate (with RC),American Journal of Mathematics and Statistics, 2(3)(2012), 2732. (doi: 10.5923/ j.ajms.20120203.03).
 Fractional Ecosystem Model and Its Solution by Homotopy Perturbation Method (with PS), International Journal of Ecosystem, 2(5) (2012), 140149. (doi: 10.5923/j.ije.20120205.06)
 An analytic algorithm for fractional order (2+1) dimensional coupled Burgers’ system model (with PKS, KV & VSP), Nonlinear Sci. Letter A, 4(4) (2013), 98111.
 Solution of fractional DrinfeldSokolovWilson equation using homotopy perturbation transforms method (with PKS & KV), Application and Applied Mathematics,10(1)(June 2015),460472.
 Combined synchronization of timedelayed chaotic systems with certain parameters (with VKY, GP & SD), Chinese Journal of Physics, 55 (2017), 457466. (SCI)
(Abbreviations: AKA.Kundu; ACAmalenduChoudhury; AC_{1}Arindam Choudhury; BSCB.S.Choudhury; BSPB.S.Purkayastha; BSB.Sinha; CBC.Bandyopadhyay;DKPD.K.Patel; DRDeepak Rout; EKE.Karapinar; GHGhanshyam Prasad; HRH.Rajput; KVK.Vishal; LKLokesh Kumar; MKM.K.Singh;NMN.Metiya; NSN.Sen; PBP.Borah; PKSP.K.Singh; PPMP.P.Murthy, RNMRN.Mukherjee; RCR.Chakravarty, SABS.A.Begum; SB SaumakBiswas;SKS.Kar; SSS.Saha; SKYS.K.Yadav; VSPV.S.Pandey; VTVandanaTiwari; VV VandanaVerma)
o Publications as a chapter in edited books/Proceedings
 Agricultural development of NorthEastern Region in the PostReform periodA case study of Cachar District of South Assam in the Edited book : “Economic Reforms and Agricultural Development in NorthEast India” (Ed. K. Sengupta& N. Roy), Mittal Publications, New Delhi, 2003, 115140.
 Mathematical Modeling of Rainwater Harvesting in the Edited Book: “Water Harvesting and Water Utilisation in North East India”, Assam University Publication 2007, 144150.
 An efficient psFCM Clustering Algorithm (with SB, BSP & AC_{1}), IEEE International Advance Computing Conference (IACC 2009) Proceedings, Patiala, India, March 67, 2009, 383389.
 On the Theory of Vague Soft sets in the Proceeding of the “International Conference on Rough sets, Fuzzy sets and Soft Computing”, Dept. of Mathematics, Tripura University, Agartala, Serials Publications, New Delhi, 2011, 146161.
 A novel soft theoretic AHP model for project management in multicriteria decision making problem in the Springer Proceedings of the “International Conference on Facets of Uncertainties and Applications (ICFUA 2013), Kolkata, India, December 57, 2013” (Editors: M.K.Chakraborty, A. Skowron, M. MaitiandS. Kar), published in 2015, 201213. (SCOPUS)
 WaveletBased Recognition of Handwritten Characters Using Artificial Neural Network (with D K Patel & M K Singh) in the Handbook of Research on"Generalized and Hybrid Set Structures and Applications for Soft Computing"(A volume in the Advances in Computational Intelligence and Robotics (ACIR) Book Series) (Editor: Sunil Jacob John), IGIGlobal Publication, USA, 2016, 473489. (SCOPUS)
 Some Results on Fixed Points of Weak. Contractions for Non Compatible Mappings via (E.A)Like Property. T. Som, A. Kundu and B.S. Choudhury, in the Springer Proceedings of Mathematics and Statistics: Applied Analysis in Biological and Physical Sciences: ICMBAA 2015, Aligarh, India; Editors – Jim M Cushing, M Saleem, H M Srivastava, M A Khan & M Merajuddin, 2016, 427438. (SCOPUS)
 A novel soft set theoretic prisoners' dilemma game model, Tuli Bakshi ; Arindam Sinharay ; Tanmoy Som, IEEE Proceedings 3rd International Conference RAIT 2016, 160163. (SCOPUS)
 An introduction towards automated parameterization reduction of soft set, Tuli Bakshi ; Arindam Sinharay ; Tanmoy Som, IEEE Proceedings 3rd International Conference RAIT 2016, 164171. (SCOPUS)
 Some Results on Fixed Points of Weak. Contractions for Non Compatible Mappings via (E.A)Like Property, T. Som, A. Kundu and B.S. Choudhury, in the Springer Proceedings of Mathematics and Statistics: Applied Analysis in Biological and Physical Sciences: ICMBAA 2015, Aligarh, India; Editors – Jim M Cushing, M Saleem, H M Srivastava, M A Khan & M Merajuddin, 2016, 427438.(SCOPUS)
 Fixed point results for (φ, ψ)weak contraction in fuzzy metric spaces (Vandana Tiwari and T Som), Springer Proceedings Communications in Computer and Information Science (CCIS) 2018, 278285. (SCOPUS)
 Convergence of generalized Mann type of iterates to common fixed point (T Som, A Choudhury, D R Sahu and Ajit Kumar), Springer Proceedings of Mathematics and Statistics (POMS) 2018. (SCOPUS)
 Enhanced Prediction for Piezophilic Protein by incorporating Reduced Set of Amino Acids using FuzzyRough Feature Selection Technique followed by SMOTE (Anoop Kumar Tiwari1, Shivam Shreevastava, Karthikeyan Subbiah, Tanmoy Som), Springer Proceedings of Mathematics and Statistics (POMS) 2018. (SCOPUS)
 Fuzzy Goal Programing Approach for Resource Allocation in a NGO Operation, (Vinaytosh Mishra, Tanmoy Som, Cherian Samuel and SK Sharma) Springer Proceedings of Mathematics and Statistics (POMS) 2018. (SCOPUS)
o INVITED TALKS DELIVERED AT VARIOUS SEMINARS/CONFERENCES/WORKSHOPS
 "Fixed point theorems on fuzzy metric spaces" at the International Conference on Recent Developments in Mathematical Analysis with Applications to Industrial Problems at B.H.U., Varanasi, March 25, 1998.
 "Fixed point results on 2 Banach spaces" at National seminar on recent Developments in Mathematics at the University of Burdwan, Feb 13, 2000.
 "Some results on approximating fixed points" at the National Seminar on Mathematics and its Applications at the University of Burdwan, Dec 2628, 2001.
 "Agricultural development of North Eastern Region (A case study of Cachar)" at the Regional Seminar on Agricultural Development and Economic Reforms in the context of North Eastern Region at the Dept. of Economics, Assam University, Silchar, Feb 5, 2002.
 "On soft relation and Fuzzy soft relation" at the National Seminar on Recent Advances in Mathematics and Applications at the University of Burdwan, Jan 1820, 2006.
 "On fixed point theory via biased maps" at the International Conference on Frontiers of Mathematics & Applications at the University of Burdwan, Jan 1618, 2008.
 "On the theory of Soft sets, soft relation and Fuzzy soft relation' at the National Seminar on Fuzzy
Mathematics and Its Applications organized by Tripura Mathematical Society, School of IT and Comp. Sci. at Tripura University, Agartala, Nov 2526, 2006.  "On fixed point theory via biased maps" at the International Conference on Frontiers of Mathematics and Applications at the University of Burdvan, Jan 1618, 2009.
 "On the theory of Soft sets and Soft relation" at the National Conference on Analysis and Its Application at the Dept. of Mathematics, BHU, Varanasi, Mar 1921, 2009.
 "On the theory of Vague Soft sets" at the International Conference on Rough Sets, Fuzzy Sets and Soft Computing at the Dept. of Mathematics, Tripura University, Agartala, Nov 57, 2009.
 "On the theory of fixed and common fixed points" at the National Conference on Recent Advances in
Mathematical Sciences and their Applications at the Dept. of Mathematics, Assam University, Silichar, Nov. 2527, 2010.  "Vague Soft Sets and Related Algebraic Properties" at the National Seminar on Mathematics and Applications at the Dept. of Mathematics, University of Burdwan, Feb 2425, 2011.
 "Extention of Caristi's Theorem to Banach Space and its Application in cone Metric Space" at the National Seminar on Analysis and Applications organized by Calcutta Mathematical Society, Sept 67, 2011.
 "Common fixed points for two self maps under strongly partially commuting condition" at the 14thInternational Conference of the International Academy of Physical Sciences (CONIAPS XIV), NIT, Surat (India) during Dec 2224, 2011.
 "Concepts on soft sets, soft relation, fuzzy soft relation and vague soft sets" at the symposium on "Modeling and Uncertainty" in the 77th annual conference at the SRTM University, Nanded, Maharastra during 2730, Dec 2011.
 “Data clustering: An overview from soft computing perspective” at the National Conference on Fuzzy Soft Computing Mathematical Analysis2012 held at the Department of Mathematics, Pondicherry University, Pondicherry during Oct 45, 2012.
 “Fixed points for rweakly commuting maps and weakly compatible maps on metric spaces” at the National Conference on “Advances in Mathematical Sciences” at Department of Mathematics, MNNIT, Allahabad during October 0507, 2012.
 “Fixed point results for semi compatible mappings under tweak reciprocal continuity” at The International Conference on the Theory, Methods and Applications of Nonlinear Equations” held at the Department of Mathematics, Texas A & M University, Kingsville, USA during Dec. 1721, 2012.
 “Mathematical Modeling: A brief Approach” at the National Workshop on “Predictive Mathematical Models in Science and Engineering (PMMSE 2013)”, at NIT, Kurukshetra, May 24  25, 2013.
 (y;η;f)weak contraction principle in ordered cone metric space, at national conference on advances in mathematics and its applications (ama2013), 2527 June 2013, India at NIT, Hamirpur.
 “On Hesitant fuzzy relations and Hesitant soft relations” Guest Lecture(s) in the Theme Meeting on ‘FUZZY AND INTERVAL BASED UNCERTAINTY MODELING (FIUM2013)’ during 1820 July, 2013 at NIT, Rourkela.
 “A Novel Soft theoretic AHP Model for Project Management in MultiCriteria Decision Making Problem” at the International Conference on “Facets of Uncertainties and Applications” jointly held by ORSICalcutta Chapter, Dept. of Applied Mathematics, Calcutta University and Ramakrishna Institute of Culture, Kolkata, Dec. 57, 2013.
 “Some results on approximation theory and invariant points” at the 80^{th} Annual Conference of Indian Mathematical Society held at ISM, Dhanbad, Dec 2730, 2014.
 “Applications of fixed point results in Best and simultaneous approximation theory and results on invariant points” at the 9th International Conference on Nonlinear Analysis and Convex Analysis” held by Dept. of Mathematics, Faculty of Science Naresuan University at Chiang Rai, Thailand, Jan 2125, 2015.
 “Some results on fixed points of weak contractions for non compatible mappings via E.A. like property” at the International Conference on Recent Advances in Mathematical Biology, Analysis and Application at the Dept. of Applied Mathematics, AMU, Aligarh, June 46, 2015.
 "A Technique of Nonlinear Analysis : Fixed Point Theory" at the National Seminar on ANALYSIS and APPLICATIONS : celebrating 100 years of the General Theory of Relativity held at West Bengal State University, Barasatduring March 1011, 2016.
 “Fuzzy Informative Evidence Theory and Application in Project Selection Problem” at the World Conference on Soft Computing (WConSC2016), held at University of California, Berkeley (USA) during May 2225, 2016.
 “Intuitionistic Fuzzy Rough Set Approach for Attribute Reduction” at the National Conference on Discrete Mathematics and Computing held at College of Engg. Vatakara, Kozikode during Feb 2021, 2017.
 “Fuzzy Sets and Applications” at Dept. of CSE & IT, MITS, Gwalior in TIQEP II program, March 1, 2017.
 “Fuzzy Cognitive Maps” at the International Training Workshop/ STC on ‘Fuzzy Logic with Applications, IIT (BHU), Varanasi during March 2025, 2017.
 "Classical and Fuzzy Clustering” at the International Training Workshop/ STC on ‘Fuzzy Logic with Applications , IIT (BHU), Varanasi during March 2025, 2017.
 “Common Fixed Point Results in Cone Metric Spaces Using Altering Distance Function” at the STC/ Workshop on Fixed Point Theory and Dynamical Systems, IIT (BHU), Varanasi during Nov 2030, 2017.
 “Common fixed point results for weakly commuting maps by alternating distances” at the STC/Workshop on Fixed Point Theory and Dynamical Systems, , IIT (BHU), Varanasi during Nov 2030, 2017.
 “Solution of simultaneous equations in Hausdorff space and a common fixed point theorem” at the STC/Workshop on Fixed Point Theory and Dynamical Systems, , IIT (BHU), Varanasi during Nov 2030, 2017.
 “Concepts of soft sets, soft relation, fuzzy soft relation and Applications” at the International Conference on Mathematics and Computing, IIT (BHU), Varanasi, Jan 912, 2018.
 “Different Aspects of Modeling: Concepts of soft sets, soft relation, fuzzy soft relation and Applications” at the National Training Programme on The Art of Mathematical Modeling as Teaching Pedagogy held at St. Aloysius (Autonomous) College, Jabalpur during Feb 910, 2018.
 “Concepts of soft sets, soft relation, fuzzy soft relation and Applications” at the Short Term Training Program on Numerical Computations and Optimization Techniques held at JEC Jabalpur during Feb 610, 2018.
 “Triangular Fuzzy Numbers and Their Properties” at the International Workshop on Modeling, Simulation and Soft Computing" held at Department of Mathematics, NIT, Silchar during Aug 1014, 2018.
 “Rough set theory” at the "International Workshop on Modeling, Simulation and Soft Computing" held at Department of Mathematics, NIT, Silchar during Aug 1014, 2018.
o INVITED LECTURES AS RESOURCE PERSON AT REFRESHER COURSES
1. Three lectures on ‘Boolean Algebra and Applications’ at the 7th refresher course in Mathematics at Gauhati University, Dec.1517, 2001.
2. Six lectures on ‘Boolean Algebra and Applications and Fuzzy Sets’ at the 3rd refresher course in Mathematics at Manipur University, Dec. 1821,
2001.
3. Three lectures on ‘Analysis’ at the 7th refresher course in Mathematics at Manipur University, June 47, 2002.
4. Three lectures on ‘Boolean Algebra and Applications’ at the 1st refresher course in Mathematics at Assam University, Nov.14 Dec 4, 2002.
5. Panel Discussion on ‘Mathematics Education and Research in North East India’ on the occasion of Mathematics Day held at IIT, Guwahati, Aug 21, 2004.
6. Acted as resource person in the ‘Workshop on Research Methodology in Basic Sciences’ held at Assam University during Nov 1317, 2006.
7. Delivered four lectures on “Number Theory” at Advance training program at the Dept. of Mathematics, Gauhati University during Dec. 22 23,
2006.
8. Four lectures on ‘Fuzzy Set Theory and Soft Set Theory’ at the refresher course in Computer Science at Kalyani University, Jan.727, 2008.
o PARTICIPATED and PRESENTED
1. "Generalization of Leader’s fixed point principle" at the 48th Annual Conference of I.M.S held at Bhagalpur University from Dec 2628, 1982.
2. "Some results on comparison principle and generalized nonlinear contractions in abstract spaces" at the ‘International Symposiumon Modern
Analysis and its Applications’ held at I.I.T. Delhi between Dec. 2124, 1983.
3. "Nonlinear mappings in metric and Hausdorff spaces and their common fixed point" at the 71st session of I.S.C.A. held at Ranchi University
between Jan 36, 1984.
4. "A note on a fixed point result of Ray" at the 72th session of I.S.C.A. held at Lucknow University between Jan. 38, 1985.
5. "Fixed point principle for a pair of operators and some related results at the 50th Annual Conference of I.M.S. held at S.P. University,
BallabhVidyanagar between Feb. 68, 1985.
6. "A common fixed point result for two nonself mappings" at the 73rd session of I.S.C.A. held at Delhi University between Jan. 38, 1986.
7. "Common fixed point results for asymptotically commuting mappings in uniformly convex Banach spaces" at the 53rd Annual Conference of
I.M.S. held at Gorakhpur University between Dec. 29. 29, 1987 and Jan 1, 1988.
8. Attended ‘National Seminar on Analysis and Its Applications’ held at Burdwan University between Dec. 2729, 1994.
9. "Convergence of modified Mann type of iterates and fixed point" at the 62th Annual Conference of I.M.S. held at I.I.T. Kanpur between Dec. 22
25, 1996.
10. "A step towards optimization of agricultural products in the district of Cachar" at the North East Regional Conference on Mathematics held by
Assam Academy of Mathematics at Gauhati University between Apl. 2526, 1997.
11. "Recent concepts on the theory of common fixed points and few results" at the ‘International Conf. on Geometry, Analysis and Applications’
organised by Dept. of Mathematics, B.H.U, Varanasi, Aug 2124, 2000.
12. Attended the ‘Conference on Functional Analysis and Its Applications’ organised by Theoretical Statistics and Mathematics Division, I.S.I.,
Kolkata, June 1315, 2001.
13. "Some common fixed point results on fizzy metric spaces" at the conf. of ISFUMIP on ‘Fuzzy set Theory and its Mathematical Aspects and
Applications’ held at B.H.U., Varanasi , Dec 2628’ 2002.
14. Attended the Ist ‘International Conference on Pattern Recognition and Machine Intelligence’ organized by Machine Intelligence Unit of ISI,
Kolkata during Dec. 2022, 2005.
15. "Handwritten character recognition using fuzzy membership function" at the ‘National Conference & Workshop on High Performance Computing
& Applications’ organized by Dept. of Computer Science, BHU, Varanasi, Feb 911’ 2009.
16. “An Introduction towards Automated Parameterization Reduction of Soft Set” at the 3rd IEEE International Conference on Recent
Advances in Information Technology (RAIT2016) held at ISM Dhanbad during March 35, 2016.
Conferences/Workshop/Short Term Courses Organized
i) National Conference on ‘Recent Developments in Mathematics and Applications’ during March 1416’ 2001 at Assam University, Silchar
ii) Winter School on Image Processing and Analysis’ during Jan 1822, 2007 at Assam University, Silchar (in collaboration with ISI, Kolkata).
iii) National Conference on 'Recent Trends in Mathematical Modeling and Simulation' during March 1820, 2010 at the Department of Applied
Mathematics, Institute of Technology, Banaras Hindu University, Varanasi.
iv) National Conference on 'Mathematical Modeling and Computer Simulation' during March 2527, 2011 at the Department of Applied Mathematics,
Institute of Technology, Banaras Hindu University, Varanasi.
v) National Conference on 'Mathematical Modeling and Computer Simulation' during March 2325, 2012 at the Department of Applied Mathematics,
Institute of Technology, Banaras Hindu University, Varanasi.
vi) National Workshop on Mathematical Modelling& Computer Simulation (jointly with Prof. S. Das) under the aegis of the TeachingLearning
Cell, IIT(BHU) during March 2021, 2015.
vii) International Training Workshop/ STC on ‘Fuzzy Logic with Applications’ during March 2025, 2017.
viii) STC/Workshop on ‘Fixed Point Theory and Dynamical Systems’ during Nov 2030, 2017.
x) International Conference on Mathematics and Computing (jointly with Dr. D Ghosh), IIT (BHU), Varanasi, Jan 912, 2018.
o AWARDS
CSIR  SRF : Aug 1983  Sept 1985.
National Merit Scholarship : 1974  75 to 1977 78.
o MEMBERSHIP OF ACADEMIC BODIES
Indian Mathematical Society (Life Member)
Calcutta Mathematical Society (Life Member)
Bharata Ganita Parisad (LU) (Life Member)
Assam Academy of Mathematics (GU) (Life Member)