## Rajat Kanti Nath

Designation :Assistant Professor.

Qualification :M.Sc. (Tezpur University), M.Phil., Ph.D. (North-Eastern Hill University).

Specialization :Finite group theory and character theory of finite groups.

Date of Joining TU :17 August, 2011.

Details of Educational Qualifications:

- HSLC from
Raniganj Higher Secondary School, Raniganj, Dhubri, Assam in1998.

- HS from
Abhayeswari Higher Secondary School, Abhayapuri, Bongaigaon, Assam, in2000.

- B. Sc. in Mathematics (Major) from
Birjhora Mahavidyalaya, Bongaigaon, under Gauhati University, Assam in2004.

- M. Sc. in Mathematics from
Tezpur University, Tezpur, Sonitpur, Assam in2006.

- M. Phil. in Mathematics from
North-Eastern Hill University, Shillong, Meghayalaya in2008.

Title of the Thesis:Commutativity Degree of Finite Groups-A Survey.

Supervisor:Prof. Ashish Kumar Das.

- Ph. D. in Mathematics from
North-Eastern Hill University, Shillong, Meghayalaya in2011.

Title of the Thesis:Commutativity Degree, its Generalizations, and Classification of Finite Groups.

Supervisor:Prof. Ashish Kumar Das.Details of Employment:

(5) 2021 to present: Assistant Professor (Stage III/Level 12), Department of Mathematical Sciences, Tezpur University, Assam.

(4) 2016 to 2020: Assistant Professor (Stage II), Department of Mathematical Sciences, Tezpur University, Assam.

(3) 17th August, 2011 to 4th December, 2015: Assistant Professor (Stage I), Department of Mathematical Sciences, Tezpur University, Assam.

(2) 14th February, 2011 to 6th August, 2011: Post Doctoral Fellow in Mathematics, Harish-Chandra Research Institute, Allahabad.

(1) 26th July, 2010 to 31st January, 2011: Assistant Professor, Department of Basic Sciences, DBCET, Assam Don Bosco University, Assam.

My Ph. D. Students:

Ms. Shrabani Das

Roll. No.:MSP21104 (Admitted on 3rd October, 2021)

Name of the Fellowship:

Area of work:Algebra and Graph Theory.

Mr. Firdous Ee Jannat

Roll. No.:MSP21108 (Admitted on 3rd October, 2021)

Name of the Fellowship:DST-INSPIRE Fellowship

Area of work:Algebra and Graph Theory.

Ms. Monalisha Sharma

Roll. No.:MSP18111 (Admitted on 30th July, 2018)

Name of the Fellowship:DST-INSPIRE Fellowship

Area of work:Algebra and Graph Theory.

Mr. Parthajit Bhowal

Roll. No.:MSP18101 (Admitted on 24th July, 2018)

Name of the Fellowship:CSIR-Junior/Senior Research Fellowship

Area of work:Algebra and Graph Theory.

Dr. Walaa Nabil Taha Fasfous(International Student from Palestine)

Roll. No.:MSP18110 (Admitted on 26th July, 2018; Thesis submitted on 12th February, 2021 and defended on 17th August, 2021)

Name of the Fellowship received:ICCR Scholarship for Foreign Students

Title of the Thesis:Various spectra and energies of commuting graphs of finite groups and rings.

Dr. Parama Dutta

Roll. No.:MSP16002 (Admitted on 19th January, 2016; Thesis submitted on 10th January, 2019 and defended on 9th December, 2019)

Name of the Fellowship received:DST-INSPIRE Fellowship

Title of the Thesis:Generalized commuting probabilities of some finite algebraic structures.

Current Position:Assistant Professor, Department of Mathematics, Lakhimpur Girls' College, Lakhimpur, Assam.(I am also interested in hosting National/International Post-Doctoral Fellows with external funding at Tezpur University.)

List of Publications:

(50) P. Bhowal, P. J. Cameron, R. K. Nath and B. Sambale, Solvable conjugacy class graph of groups, submitted for publication.

(49) P. Bhowal and R. K. Nath, Spectrum and energies of commuting conjugacy class graph of a finite group, submitted for publication.

(48) W. N. T. Fasfous and R. K. Nath, Inequalities involving energy and Laplacian energy of non-commuting graphs of finite groups, submitted for publication.

(47) J. Dutta, D. K. Basnet and R. K. Nath, Commuting probabilities of n-centralizer finite rings, submitted for publication.

(46) G. Arunkumar, P. J. Cameron, R. K. Nath and L. Selvaganesh, Super graphs on groups I,Graphs and Combinatorics, accepted for publication.

(45) J. Dutta, D. K. Basnet and R. K. Nath, Characterizing some rings of finite order,Tamkang Journal of Mathematics, accepted for publication.

(44) M. Sharma and R. K. Nath, Relative g-noncommuting graph of finite groups,Electronic Journal of Graph Theory and Applications, 10 (2022), no. 1, 113–130.

(43) P. Bhowal, D. Nongsiang and R. K. Nath, Non-solvable graphs of finite groups,Bulletin of the Malaysian Mathematical Sciences Society, 45 (2022), no. 3, 1255–1272.

(42) R. Sharafdini, R. K. Nath and R. Darbandi, Energy of commuting graph of finite AC-groups,Proyecciones Journal of Mathematics, 41 (2022), no. 1, 263–273.

(41) P. Bhowal and R. K. Nath, Genus of commuting conjugacy class graph of certain finite groups,Algebraic Structures and Their Applications, 9 (2022), no. 1, 93–108.

(40) M. Sharma, R. K. Nath and Y. Shang, On g-noncommuting graph of a finite group relative to its subgroups,Mathematics, 9 (2021), no. 23, 3147 (13 pages).

(39) W. N. T. Fasfous, R. Sharafdini and R. K. Nath, Common neighborhood spectrum of commuting graphs of finite groups,Algebra and Discrete Mathematics, 32 (2021), no. 1, 33–48.

(38) R. K. Nath, M. Sharma, P. Dutta and Y. Shang, On r-noncommuting graph of finite rings,Axioms, 10 (2021), no. 3, 233 (14 pages).

(37) R. K. Nath, W. N. T. Fasfous, K. C. Das and Y. Shang, Common neighborhood energy of commuting graphs of finite groups,Symmetry, 13 (2021), no. 9, 1651 (12 pages).

(36) P. Bhowal and R. K. Nath, Spectral aspects of commuting conjugacy class graph of finite groups,Algebraic Structures and Their Applications, 8 (2021), no. 2, 67–118.

(35) P. Dutta and R. K. Nath, Various energies of commuting graphs of some super integral groups,Indian Journal of Pure and Applied Mathematics, 52 (2021), no. 1, 1–10.

(34) P. Dutta and R. K. Nath, On r-commuting probability of finite rings,Indian Journal of Mathematics, 62 (2020), no. 3, 287–297.

(33) P. Bhowal, D. Nongsiang and R. K. Nath, Solvable graphs of finite groups,Hacettepe Journal of Mathematics and Statistics, 49 (2020), no. 6, 1955–1964.

(32) W. N. T. Fasfous, R. K. Nath and R. Sharafdini, Various spectra and energies of commuting graphs of finite rings,Hacettepe Journal of Mathematics and Statistics, 49 (2020), no. 6, 1915–1925.

(31) P. Dutta and R. K. Nath, Some bounds for relative autocommutativity degree,Proyecciones Journal of Mathematics, 39 (2020), no. 3, 679–691.

(30) P. Dutta and R. K. Nath, Generalized autocommuting probability of a finite group relative to its subgroups,Hacettepe Journal of Mathematics and Statistics, 49 (2020), no. 1, 389–398.

(29) P. Dutta, B. Bagchi and R. K. Nath, Various energies of commuting graphs of finite nonabelian groups,Khayyam Journal of Mathematics, 6 (2020), no. 1, 27–45.

(28) R. K. Nath, A note on super integral rings,Boletim da Sociedade Paranaense de Matemática, 38 (2020), no. 4, 213–218.

(27) R. K. Nath, On asymptotic commutativity degree of finite groups,Proyecciones Journal of Mathematics, 38 (2019), no. 4, 859–865.

(26) J. Dutta, W. N. T. Fasfous and R. K. Nath, Spectrum and genus of commuting graphs of some classes of finite rings,Acta et Commentationes Universitatis Tartuensis de Mathematica, 23 (2019), no. 1, 5–12.

(25) P. Dutta and R. K. Nath, On relative commuting probability of finite rings,Miskolc Mathematical Notes, 20 (2019), no. 1, 225–232.

(24) P. Dutta and R. K. Nath, On generalized autocommutativity degree of finite groups,Hacettepe Journal of Mathematics and Statistics, 48 (2019), no. 2, 472–478.

(23) J. Dutta, D. K. Basnet and R. K. Nath, A note on n-centralizer finite rings,An. Stiint. Univ. Al. I. Cuza Iasi Mat., LXIV (2018), no. f.1, 161–171.

(22) R. K. Nath and S. K. Prajapati, On the number of solutions of a generalized commutator equation in finite groups,Acta Mathematica Hungarica, 156 (2018), no. 1, 18–37.

(21) P. Dutta and R. K. Nath, On Laplacian energy of non-commuting graphs of finite groups,Journal of Linear and Topological Algebra, 7 (2018), no. 2, 121–132.

(20) P. Dutta, J. Dutta and R. K. Nath, On Laplacian spectrum of non-commuting graphs of finite groups,Indian Journal of Pure and Applied Mathematics, 49 (2018), no. 2, 205–216.

(19) P. Dutta and R. K. Nath, Autocommuting probability of a finite group,Communications in Algebra, 46 (2018), no. 3, 961–969.

(18) P. Dutta and R. K. Nath, A generalization of commuting probability of finite rings,Asian-European Journal of Mathematics, 11 (2018), no. 2, 1850023 (15 pages).

(17) R. K. Nath, Various spectra of commuting graphs of n-centralizer finite groups,International Journal of Engineering, Science and Technology, 10 (2018), no. 2S, 170–172.

(16) J. Dutta and R. K. Nath, Laplacian and signless Laplacian spectrum of commuting graphs of finite groups,Khayyam Journal of Mathematics, 4 (2018), no. 1, 77–87.

(15) J. Dutta, D. K. Basnet and R. K. Nath, On generalized non-commuting graph of a finite ring,Algebra Colloquium, 25 (2018), no. 1, 149–160.

(14) J. Dutta and R. K. Nath, Finite groups whose commuting graphs are integral,Matematički Vesnik, 69 (2017), no. 3, 226–230.

(13) J. Dutta, D. K. Basnet and R. K. Nath, On commuting probability of finite rings,Indagationes Mathematicae, 28 (2017), no. 2, 372–382.

(12) J. Dutta and R. K. Nath, Spectrum of commuting graphs of some classes of finite groups,Matematika, 33 (2017), no. 1, 87–95.

(11) R. K. Nath and M. K. Yadav, On the probability distribution associated to commutator word map in finite groups,International Journal of Algebra and Computation, 25 (2015), no. 7, 1107–1124.

(10) R. K. Nath and M. K. Yadav, Some results on relative commutativity degree,Rendiconti del Circolo Mathematico di Palermo, 64 (2015), no. 2, 229–239.

(9) R. K. Nath, A new class of almost measure preserving maps on finite simple groups,Journal of Algebra and Its Application13 (2014), no. 4, 1350142 (5 pages).

(8) R. K. Nath, Commutativity degree of a class of finite groups and consequences,Bulletin of the Australian Mathematical Society, 88 (2013), no. 3, 448–452.

(7) A. K. Das, R. K. Nath and M. R. Pournaki, A survey on the estimation of commutativity in finite groups,Southeast Asian Bulletin of Mathematics, 37 (2013), no. 2, 161–180.

(6) A. K. Das and R. K. Nath, A generalization of commutativity degree of finite groups,Communications in Algebra, 40 (2012), no. 6, 1974–1981.

(5) R. K. Nath and A. K. Das, On generalized commutativity degree of a finite group,Rocky Mountain Journal of Mathematics, 41 (2011), no. 6, 1987–2000.

(4) A. K. Das and R. K. Nath, A characterization of certain finite groups of odd order,Mathematical Proceedings of the Royal Irish Academy, IIIA (2011), no. 2, 69–78.

(3) R. K. Nath and A. K. Das, On a lower bound of commutativity degree,Rendiconti del Circolo Mathematico di Palermo, 59 (2010), no. 1, 137–141.

(2) A. K. Das and R. K. Nath, On generalized relative commutativity degree of a finite group,International Electronic Journal of Algebra, 7 (2010), 140–151.

(1) A. K. Das and R. K. Nath, On Solutions of a class of equations in a finite group,Communications in Algebra, 37 (2009), no. 11, 3904–3911.

Book Published:

(1) R. K. Nath, Some new directions in Commutativity Degree of finite groups: Recent Developments, LAP LAMBERT Academic Publishing House, Germany, 2011, ISBN No. 978-3-8465-4657-4.

Book Chapter:

(1) J. Dutta and R. K. Nath, Rings having four distinct centralizers, Matrix, M. R. Publication, Assam. Ed. P. Begum. ISBN No. 978-93-85229-38-1, pp. 12–18 (2017).

Session Chaired:

(1) Chaired a Paper Presentation Session in the International Conference on Emerging trends in Pure and Applied Mathematics; organized by Department of Applied Sciences (Mathematics) in association with Department of Mathematical Sciences, Tezpur University during March 12 to 13, 2022.

Selected talks:

(9)Commuting and non-commuting graphs of finite groups and their extensionsdelivered in the 27th Iranian Algebra Seminar, on March 10, 2022.

(8)Various graphs on finite groups arising from commutativitydelivered in the Group Theory Sangam-A Confluence of Group Theorists in India, on February 23, 2021.

(7)Commuting and autocommuting probability of finite groupsdelivered in the National Conference on Green, Sustainable and Evolving Sciences (GSES'2019) and 64th Annual Technical Session of Assam Science Society, June 29, 2019, Cotton University, Guwahati.

(6)Necessity of thinking and imagination in learning Mathematicsdelivered in the Teachers' Orientation Programme on June 27, 2017, MVMSS School, Guwahati.

(5)A series of four lectures on group theorydelivered in the Instructional school 2013 on Group Theory and Linear Algebra, December 17 to 20, 2013, Centre for Applied Mathematics, Central University of Jharkhand, Ranchi.

(4)Commuting probability of finite groupsdelivered in Department of Mathematics, D.H.S.K. College, Dibrugarh on September 21, 2013.

(3)On generalized commutativity degree of finite groupsdelivered in the International Conference on Group Theory and Lie Theory, March 19 to 21, 2012, Harish-Chandra Research Institute, Allahabad.

(2)On commutativity degree of finite groupsdelivered in the Workshop on Algebra and Number Theory, December 22 to 26, 2010, Tezpur University.

(1)Commutativity degree, its generalizations, and classification of finite groupsdelivered in the International Conference on Groups, Actions and Computations, September 10 to 12, 2010, Harish-Chandra Research Institute, Allahabad.

Papers Presented:

(13)g-noncommuting graph of a finite group relative to its subgroups, presented in the 6th Biennial International Group Theory Conference-2021, organized by Department of Mathematics, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu, India in Association with Department of Pure Mathematics, Faculty of Mathematical Sciences, Ferdowsi University of Mashhad, Mashhad, Iran during March 04 to 06, 2021.

(12)Spectrum and energy of non-commuting graphs of finite groups, presented in the International Conference in Algebraic Graph Theory and Applications (ICAGTA 2020) held at Department of Mathematics, Presidency University, Kolkata during November 21 to 22, 2020.

(11)Solvable graphs of finite groups, presented in the International Conference of Mathematical Modelling in Applied Sciences (ICMMAS 2020) held at Department of Mathematics, Dibrugarh University during June 28 to 30, 2020.

(10)Non-solvable graph of finite groups, presented in the ICTS program Group Algebras, Representation and Computation held at ICTS Bangalore during October 14 to 18, 2019.

(9)Spectrum and genus of commuting graphs of some classes of finite rings, presented in the National Seminar on Pure and Applied Mathematics, held at St. Mary's College, Shillong on 19th and 20th September, 2018.

(8)Relative r-noncommuting graph of a finite ring, presented in the International Conference on Discrete Mathematics and its Application to Network Science, held at the Department of Mathematics, BITS Pilani, K. K. Birla Goa Campus from July 7 to 10, 2018.

(7)Various spectra of commuting graphs of n-centralizer finite groups, presented in the National Conference on Advances in Sciences, Engineering and Technology held at GIMT Tezpur, organized by GIMT Tezpur from November 10 to 11, 2017.

(6)Spectral aspects of commuting graphs of n-centralizer finite groups, presented in the National Seminar on Science and Technology for Human Welfare, held at Institute of Advanced Study in Science and Technology (IASST), Guwahati, organized by IASST, Guwahati on February 27, 2017.

(5)On super integral rings, presented in the National Conference on Advances in Mathematical Sciences, held at Gauhati University, organized by Department of Mathematics, Gauhati University from December 22 to 23, 2016.

(4)On a problem posed by Paul Lescot, presented in the National Conference on Mathematics and its Applications, held at Cotton College, organized by the Department of Mathematics, Cotton College and Cotton College State University from October 21 to 22, 2016.

(3)On a lower bound of commutativity degree, presented in the UGC-SAP Workshop on Algebra, Algebraic Topology and Related topics, held at North-Eastern Hill University, Meghalaya, organized by the Department of Mathematics, North-Eastern Hill University, Meghalaya, from March 15 to 20, 2010

(2)Some generalizations of commutativity degree and classifications of finite groups, presented in the National Conference on Recent Trends in Mathematics and its Applications, held at Gauhati University, organized by Assam Science Society and Gauhati University, Assam, India, during September 12 to 13, 2009

(1)Certain generalizations of commutativity degree of finite groups, presented in the 96th Indian science Congress, held at North-Eastern Hill University, Meghalaya, India. Organized by The Indian Science Congress Association, during January 3 to 7, 2009.

Reviewing experience:

Working as reviewer ofMathematical Reviews.Worked as a referee of following journals:

(17) Malaysian Journal of Science

(16) Advances in Applied Mathematics

(15) Heliyon

(14) Filomat

(13) Journal of Algebraic Combinatorics

(12) Bulletin of the Korean Mathematical Society

(11) Journal of Algebra and Its Applications

(10) Discrete Mathematics, Algorithms and Applications

(9) Communications in Algebra

(8) Hacettepe Journal of Mathematics and Statistics

(7) Publicationes Mathematicae Debrecen

(6) Proceedings - Mathematical Sciences

(5) ScienceAsia

(4) International Electronic Journal of Algebra

(3) Journal of Group Theory

(2) Ars Combinatoria, a Canadian Journal of Combinatorics

(1) Graph and Combinatorics.

Conference/ School/ Workshop Attended:

(44) Weeklong Online Workshop/FDP on Online Evaluation Systems organized by Organized by TLC, Tezpur University in association with IQAC, Nowgong College, during June 22 to 28, 2021.

(43) 6th Biennial International Group Theory Conference-2021 (6BIGTC–2021) organized by the Department of Mathematics, School of Advanced Sciences, Vellore Institute of Technology, Vellore, Tamil Nadu, India; in association with Ferdowsi University of Mashhad, Iran; with the academic sponsorship of Ramanujan Mathematical Society, India; during March 04 to 06, 2021.

(42) One Week Online Training on R Programming and LaTeX Typesetting organized by Department of Statistics, Institute of Science, Banaras Hindu University, Varanasi, during January 05 to 10, 2021.

(41) International Conference in Algebraic Graph Theory and Applications (ICAGTA 2020) held at Department of Mathematics, Presidency University, Kolkata during November 21 to 22, 2020.

(40) International Conference of Mathematical Modelling in Applied Sciences (ICMMAS 2020) held at Department of Mathematics, Dibrugarh University during June 28 to 30, 2020.

(39) Pedagogical Training for Mathematics Teachers, organized by MTTS Trust held at Department of Mathematical Sciences, Tezpur University during December 25 to 30, 2019.

(38) ICTS program on Group Algebras, Representation and Computation held at ICTS Bangalore during October 14 to 18, 2019.

(37) Science Academies' Refresher Course on Analysis, organized by the Department of Mathematical Sciences, Tezpur University during February 18 to March 02, 2019.

(36) Industry Academia Conclave (Tezpur University Silver Jubilee Programme) organized by Center for University-Industry Interface, Tezpur University on January 20, 2019.

(35) Sensitization Workshop on development of MOOCS (Massive Open Online Courses) organized by IQAC, Tezpur University on November 16, 2018.

(34) National Seminar on Pure and Applied Mathematics, held at St. Mary's College, Shillong on 19th and 20th September, 2018.

(33) International Conference on Discrete Mathematics and its Application to Network Science, held at the Department of Mathematics, BITS Pilani, K. K. Birla Goa Campus from July 7 to 10, 2018.

(32) Workshop on UGC guidelines of Career Advancement Scheme, organized by IQAC, Tezpur University on June 13, 2018.

(31) Workshop on Revised Framework of NAAC Accreditation, organized by IQAC, Tezpur University on May 4, 2018.

(30) Workshop on Development of Self Learning Materials for open and Distance Mode of Learning, organized by Centre for Open and Distance Learning in collaboration with Teaching Learning Centre, Tezpur University from March 6 to 7, 2018.

(29) Workshop on Cyber Security: Issues and Challenges, held at Dept. of Computer Science and Engineering, Tezpur University, conducted by Dept. of Computer Science and Engineering, Tezpur University from January 29 to 30, 2018.

(28) National Conference on Advances in Sciences, Engineering and Technology held at GIMT Tezpur, organized by GIMT Tezpur from November 10 to 11, 2017.

(27) Pedagogy for Online and Blended Teaching-Learning Process, held at Tezpur University, conducted by IIT Bombay from September 14 to October 12, 2017.

(26) Foundation Program in ICT for Education, held at Tezpur University, conducted by IIT Bombay from August 03 to September 7, 2017.

(25) 112th Orientation Programme, UGC-HRDC, Gauhati University, from May 29 to June 25, 2017.

(24) National Seminar on Science and Technology for Human Welfare, held at Institute of Advanced Study in Science and Technology (IASST), Guwahati, organized by IASST, Guwahati on February 27, 2017.

(23) National Conference on Advances in Mathematical Sciences, held at Gauhati University, organized by Department of Mathematics, Gauhati University from December 22 to 23, 2016.

(22) National Conference on Mathematics and its Applications, held at Cotton College, organized by the Department of Mathematics, Cotton College and Cotton College State University from October 21 to 22, 2016.

(21) School on Analysis and Topology, held at ISI North East Centre, organized by ISI North East Centre and Tezpur University from February 22 to March 04, 2016.

(20) Two-week ISTE STTP on Technical Communication, held at Tezpur University, conducted by IIT Bombay from October 08 to December 05, 2015.

(19) Seminar on Work and Achievement of Prof. Manjul Bhargava: Fields Medalist 2014, organized by Department of Mathematical Sciences, Tezpur University on September 06, 2014.

(18) Workshop on Credit Based Academic System, organized by IQAC, Tezpur University on June 19, 2014.

(17) Workshop on Quality Teaching, organized by IQAC, Tezpur University on July 26, 2012.

(16) International Conference on Group Theory and Lie Theory, held at Harish-Chandra Research Institute, Allahabad, organized by Harish-Chandra Research Institute from March 19 to 21, 2012.

(15) Workshop on Question Paper Setting and API, organized by IQAC, Tezpur University on March 14 to 15, 2012.

(14) Workshop on Analysis, held at Tezpur University, organized by Indian Statistical Institute, Kolkata, and Department of Mathematical Sciences, Tezpur University, January 3 to 9, 2012.

(13) Advanced Training in Mathematics School on Workshop in Group Theory held at Indian Institute of Science Education and Research Mohali. Organized by National Board of Higher Mathematics, India, from 16th May to 21st May, 2011.

(12) International Conference on Group, Action and Computations held at Harish-Chandra Research Institute, Allahabad, organized by International centre for theoretical sciences, Mumbai, from September 10 to 12, 2010.

(11) Professional Enrichment Programme: Interactive Teaching held at Don Bosco College of Engineering and Technology, organized by Assam Don Bosco University, Guwahati, from September 3 to 4, 2010.

(10) UGC-SAP workshop on Algebra, Algebraic Topology and related topics, held at North-Eastern Hill University, Meghalaya, organized by Dept. of Mathematics, NEHU, Meghalaya, from March 15 to 20, 2010.

(9) National Conference on Recent Trends in Mathematics and its Applications, held at Gauhati University, organized by Assam Science Society and Gauhati University, Assam, India, from September 12 to 13, 2009.

(8) Advanced Instructional School in Mathematics on COMBINATORICS & GRAPH THOERY (AIS-CGT), held at Bhaskaracharya Pratishthana, Pune, India. Organized by National Board of Higher Mathematics, India, from 8 May to 4 June, 2009.

(7) Short term visits: Tata Institute of Fundamental Research (TIFR, Mumbai), from June 4 to 12, 2009.

(6) 96th Indian science Congress, held at North-Eastern Hill University, Meghalaya, India. Organized by The Indian Science Congress Association, from January 3 to 7, 2009.

(5) International Workshop and Conference on Surface Mapping Class Groups and Related Topics, held at North-Eastern Hill University, Meghalaya, India. Organized by Department of Mathematics, North-Eastern Hill University, Meghalaya, India, from June 16 to 28, 2008.

(4) CMFT Workshop, 2008, held at Don Bosco Institute, Guwahati, India. Organized by CMFT, Germany, from January 3 to 10, 2008.

(3) Advanced Instructional School in Mathematics on ALGEBRAIC AND ANALYTIC NUMBER THEORY, held at Harish-Chandra Research Institute, Allahabad, India. Organized by National Board of Higher Mathematics, India, from December 3 to 28, 2007.

(2) North-East School on Computational Geometry, held at St. Anthony's College, Meghalaya, India. Organized by Advanced computing & Microelectronics Unit, Indian Statistical Institute, Kolkata, and Department of Computer Science, St. Anthony's College, Meghalaya, India, from November 1 to 3, 2007.

(1) Symposium on Some Recent Advances in Mathematics, held at North-Eastern Hill University, Meghalaya, India. Organized by Department of Mathematics, North-Eastern Hill University, Meghalaya, India, from April 4 to 5, 2007.

Conference/Symposium organized:

(2) International Conference on Emerging trends in Pure and Applied Mathematics; organized by Department of Applied Sciences (Mathematics) in association with Department of Mathematical Sciences, Tezpur University during March 12 to 13, 2022 (jointly with Prof. R. Haloi and Dr. B. K. Bebnath).

(1) A One Day National Symposium on the occasion of National Science Day; organized by Department of Mathematical Sciences, Tezpur University in collaboration with Inscignis-2022 on March 01, 2022 (jointly with Prof. D. K. Basnet and Dr. B. Das).Last updated on May 09, 2022.

Awards and achievements:

(4) Biographical profile published in Marquis Who's Who in the world 2013 (30th Pearl Anniversary Edition)

(3) Post Doctoral Fellowship at Harish-Chandra Research Institute, Allahabad for the year 2011.

(2) Certificate of Appreciation by Government of India, Ministry of Human Resource Development to witness the Republic Day Parade, 2007 from the Prime Minister's Box at Rajpath, New Delhi as a guest of hon'ble Prime Minister of India.

(1) Gold Medal for securing the first position in M. Sc.(Mathematics), Tezpur University in the year 2006.