Some past events: 

• Speaker in the Words and Transcendence - I (August 7-12, 2023), KSOM, Kozhikode

• Speaker in the 32nd Journées Arithmétiques (July 3--7, 2023), Université de Lorraine, Nancy, France

• Speaker in the NCMW- Jacobi forms (December 12--24, 2022), IIT Guwahati

• Speaker in the 5th EU/US Workshop on Automorphic Forms and Related Topics (August 1-13, 2022), University of Sarajevo, Bosnia and Herzegovina
  

• Speaker  in the National Conference on Mathematical Analysis and its applications, GIET, Gunupur (June 11-12, 2022)

• Speaker in the Discussion Meeting on Basic Sciences (DiMBS) April 6-8, 2022, HBNI, Mumbai Slides
  

• Speaker in the 2nd international webinar on Recent Development on Number Theory (October 1--4, 2021), KIIT, Bhubaneswar
  

• Speaker in the International Conference on Number Theory and Algebra (online) (December 22-23, 2020), IIT BHU, Varanasi
  

• Speaker in the Workshop on Additive Combinatorics (February 24--March 06, 2020), ICTS, Bengaluru

• Speaker in the Seminar on "On the number of representations of a natural number by certain quadratic forms", (January 4, 2020), HRI, Prayagraj
  

• Speaker in the Seminar on "Rankin-Cohen brackets on modular forms and certain Dirichlet series",  (November 19, 2019)  IIT, Guwahati
  

• Short Talk in the Value distribution of zeta and L-functions and related topics (Zetavalue2019) (March 21--27,  2019), RIKEN, Wako, Japan

• Speaker in the International Conference on Number Theory, (March 11--13, 2019), School of Mathematical Sciences, IISER, Thiruvananthapuram

• Speaker in the International Conference on Number Theory (December 10--14, 2018), KSOM, Calicut

• Speaker in the School on Modular Forms (October 3--14, 2018), KSOM, Calicut

• Speaker in the Seminar on "Rankin-Cohen brackets on modular forms and certain Dirichlet series",  (July 11, 2018) Mahidol University International College, Bangkok
  

• Speaker in the Discussion meeting on Modular Forms (February 12--24, 2018), KSOM, Calicut

• Speaker in the Conference on Number Theory: Arithmetic, Diophantine and Transcedence, December 22-25, 2017, IIT, Ropar

• Speaker in the XXXémes Journées Arithmétiques, (July 3--7, 2017), University de Caen, France

• Speaker in the Combinatorics and Number Theory Meet (February 19-23, 2017), HRI, Allahabad, India
  

• Speaker in the NISER Symposium, Indian National Science Academy (INSA) Anniversary Meeting (December 28-30, 2016), NISER, Bhubaneswar, India
  

• Speaker in the International Conference on Number Theory (August 17-21, 2016), KSOM, Calicut, India
  

• Speaker in the 3rd EU/US Workshop on Automorphic Forms and Related Topics (July 18-22, 2016), University of Sarajevo, Bosnia and Herzegovina
  

• Speaker in the Number Theory Symposium, 31st Annual Conference of the Ramanujan Math. Soc. (June 18--21, 2016), Tiruchirapalli, India
  

• Speaker in the 30th Automorphic forms Workshop, (March 7-10, 2016), Wake Forest University, Winston-Salem, USA
  

• Speaker in the Workshop on Automorphic Forms (February 10-16, 2016), KSOM, Kozhikode, India

• Speaker in the 29th Automorphic Forms Workshop (March 2-5, 2015), University of Michigan, Ann Arbour, USA
  

• Speaker in the International Conference on Automorphic Forms (February 13-14, 2015), KSOM, Kozhikode, India

• Speaker in the International Conference on Automorphic Forms and Number Theory (August 30- September 3, 2013), KSOM, Kozhikode, India

• Contributed Speaker in the The Legacy of Srinivasa Ramanujan (December 17-22, 2012), University of Delhi, India

• Speaker in the Workshop on Modular Forms (October 3-19, 2012), KSOM, Kozhikode, India

• Speaker in the 26th Automorphic Forms Workshop (April 26-29, 2012), University of British Columbia, Vancouver, Canada

• Speaker in the Bhubaneswar Symposium on Noncommutative Geometry, Mathematical Physics and Number Theory (January 12-16, 2011), IMA, Bhubaneswar, India
  

• Speaker in the Summer School on Quasimodular Forms, (June 20-26, 2010) Clermont-Ferrand, France
  

• Visit NISER, Bhubaneswar, December 14-18, 2009

• Workshop on the theory of Jacobi forms and Siegel modular forms, (November 23- December 5, 2009) Vivekananda College/ IMSc, Chennai, India
  

• Speaker in the  26émes Journées Arithmétiques XXVI,  (July 6-10, 2009) Saint-Étienne, France
  

• Speaker in the  23rd Annual Workshop on Automorphic Forms and Related Topics, (March 10-13, 2009) Bucknell University, USA,   Slides

• Talk in the K-Theory, Quadratic Forms and Number Theory Seminar  (February 4, 2009), School Of Mathematical Sciences, UCD, Dublin, Ireland

• Speaker in the Workshop in Arithmetic Geometry (September 24-October 5, 2007),  Chennai Mathematical Institute, India
  

• Speaker in the Jacobi Forms and Applications (May 7-11, 2007),  CIRM, Luminy, France      Photo 1,  Photo 2, Photo 3 . Slides

• Speaker in the International Conference on Number Theory and Applications (December 27-29, 2006), RKM Vivekananda College, India
  

• Speaker in the International Conference on Number Theory (December 1-5, 2006),  Harish-Chandra Research Institute, Allahabad, India Slides

Conferences/ Workshops participated:

• Conference on "Motives and Automorphic Forms" in Honour of Günter Harder's 85th Birthday (March 06--10, 2023), Max Planck Institute for Mathematics, Bonn, Germany
  

• 5th EU/US Workshop on Automorphic Forms and Related Topics (August 1-13, 2022), University of Sarajevo, Bosnia and Herzegovina

• Modular forms: An online conference in honour of Prof. B. Ramakrishnan’s 60th Birthday (September 17–19, 2021), IMSc, Chennai
  

• Workshop on Additive Combinatorics (February 24--March 06, 2020), ICTS, Bengaluru, India
  

• Sphere Packing, October 31--November 6, 2019, ICTS, Bengaluru, India
  

• Value distribution of zeta and L-functions and related topics (Zetavalue2019) (March 21--27,  2019), RIKEN, Wako, Japan

• Conference on Number Theory: Arithmetic, Diophantine and Transcedence, December 22-25, 2017, IIT, Ropar, India
  

• GIAN course "Transcendental Numbers and Special values of Dircichlet Series"" (December 16--21, 2017), IIT, Ropar , India
  

• XXXémes Journées Arithmétiques (July 3--7, 2017), Universite de Caen, France

• Indefinite Theta functions and Applications in Physics and Geometry (June 6--9, 2017), Hamilton Mathematics Institute, Trinity College Dublin, Ireland

• Combinatorics and Number Theory Meet (February 19-23, 2017), HRI, Allahabad, India
  

• School and Workshop on Modular Forms and Black Holes (January 5--14, 2017), NISER, Bhubaneswar, India
  

• Discussion Meeting on Automorphic Forms (December 21--27, 2016), NISER, Bhubaneswar, India
  

• Indian National Science Academy (INSA) Anniversary Meeting (December 28--30, 2016), NISER, Bhubaneswar, India
  

• International Conference on Number Theory (August 17--21, 2016), KSOM, Calicut, India
  

• 3rd EU/US Workshop on Automorphic Forms and Related Topics (July 18--22, 2016), University of Sarajevo, Bosnia and Herzegovina

• Workshop on Bianchi Modularity (July 11--15, 0216), University of Luxembourg, Luxembourg

• 31st Annual Conference of the Ramanujan Math. Soc. (June 18--21, 2016), Tiruchirapalli, India

• 30th Automorphic forms Workshop, (March 7-10, 2016), Wake Forest University, Winston-Salem, USA

• Workshop on Automorphic Forms (February 10-16, 2016), KSOM, Kozhikode, India

• 29th Automorphic Forms Workshop (March 2-5, 2015), University of Michigan, Ann Arbour, USA

• International Conference on Automorphic Forms (February 13-14, 2015), KSOM, Kozhikode, India

• Advanced School and Workshop on L-functions and modular forms (September 1-12, 2014),  ICTP, Trieste, Italy

• Conference on Analytic Theory of  Automorphic Forms (December 9-13, 2013), IMSc, Chennai, India

• International Conference on Automorphic forms and Number Theory, August 30- September 3, 2013, KSOM, Calicut, India
  

• 40th Annual  Odisha Mathematical Society Conference (December 29-30, 2012), Sambalpur University, Sambalpur, India
  

• The Legacy of Srinivasa Ramanujan  (December 17-22, 2012), University of Delhi, India

• Workshop on Modular Forms (October 3-19, 2012), Kerala School of Mathematics, Kozhikode, India

• 26th Automorphic Forms Workshop (April 26-29, 2012), University of British Columbia, Vancouver, Canada

• International Colloquium on Automorphic Representations and L-functions} (Jan 3-12, 2012), TIFR, Mumbai, India
  

• International  meeting on Number Theory, Celebrating the 60th Birthday of Professor R. Balasubramanian (Dec 15-20, 2011), HRI, Allahabad, India
  

• School and Conference on Modular Forms and Mock Modular Forms and their applications in Arithmetic, Geometry and Physics (Feb 28-March 18, 2011), ICTP, Italy

• Prospects in q-series and modular forms (July 14-16, 2010) UCD, Dublin, Ireland

• Summer School on Quasimodular Forms (June 20-26, 2010) Clermont-Ferrand, France

• Workshop on the theory of Jacobi forms and Siegel modular forms (November 23- December 5, 2009), Chennai, India

•  XXVI Journ\'{e}es Arithm\'{e}tiques (July 6-10, 2009) Saint-\'{E}tienne, France

• Activit\'{e}s Additives et Analytiques} (June 30- July 4, 2009), Lille, France

• Mock theta functions and applications in combinatorics, algebraic geometry, and mathematical physics (May 25-29, 2009) Max Planck Institute for Mathematics, Bonn, Germany

• UCD-Nottingham Number Theory Day (May 2, 2009), University of Nottingham, England
  

• 23rd Annual Workshop on Automorphic Forms and Related Topics (March 10-13, 2009), Bucknell University, USA

• International Colloquium on Cycles, Motives and Shimura Varieties (Jan 3-12, 2008), TIFR, Mumbai, India

• Advanced Instructional School in Analytic and Algebraic Number Theory (Dec 3-28, 2007), HRI, Allahabad, India

• Workshop on Arithmetic Geometry (Sept 24-Oct 05, 2007), Chennai Mathematical Institute, Chennai, India

• Jacobi Forms and Applications (May 7-11, 2007), CIRM, Luminy, France

• School and Conference on Analytic Number Theory (April 23-May 04, 2007), ICTP, Italy

• International  Conference on Number Theory and Cryptography (Feb 23-27, 2007), HRI, Allahabad, India
  

• International  Conference on Number Theory and Applications (Dec 27-29, 2006), RKM Vivekananda College, Chennai, India
  

• International  Conference on Number Theory (Dec 1-5, 2006), HRI, Allahabad, India
  

• India-UK Number Theory Conference (Sept 18-23, 2006),  IMSc, Chennai, India
  

• 33rd Annual  Odisha Mathematical Society Conference (Feb 4-5, 2006), Sambalpur University, Sambalpur, India
  

• International Conference on Number Theory and Mathematical Physics (December 20-22, 2005), Srinivas Ramanujan Center, Kumbakonam, India
  

• AMS-INDIA Conference (December 17-20, 2003),  IISc, Bangalore, India
  

Expository Lectures/ Talks:

• Teachers' Training Programme in Mathematics (November 2--5, 2023), NISER Bhubaneswar

• Sums of squares  and modular forms (Webinar), GIET, Gunupur (December 1, 2020)
  

• Supercongruences (Webinar), GM University Sambalpur (November 20, 2020)
  

• Representations of integers as sums of squares and modular forms (Webninar), Anchal College, Padampur (November 16, 2020)

• Representations of integers as sums of squares, Faculty Development Program on Multidisplinary approach of Mathematics as enginneering applications-2019, CVRCE, Bhubaneswar (December 23-28, 2019)

• Modular forms and certain applications, Faculty Development Program on Multidisplinary approach of Mathematics as enginneering applications-2019, CVRCE, Bhubaneswar (December 23-28, 2019)

• Advanced Foundation School (AFS- I),  May 6--June 1, 2019, HRI, Prayagraj

• Ramanujan and Mathematics (on the occasion of National Mathematics Day), EATM,  Khordha (December 22, 2018)
  

• Ramanujan and Mathematics (on the occasion of National Mathematics Day), Regional Science Center, Bhubaneswar (December 22, 2018)
  

• Prime numbers, Orientation Program in Mathematics, Anchal College, Padampur (November 17, 2018)
  

• Prime Numbrs, Orientation Program in Mathematics, Bandhu Ashram, Lankapada, Jagatsinghpur (November 11, 2018)
  

• Finite Group Representations (4 lectures),  Refresher Course for College Teachers, KSOM,  Calicut  (September 6--9, 2018)

• Sum of Sets in Number Theory, Orientation Program in Mathematics, Larambha College, Larambha (September 29, 2018)
  

• Group Theory (24 lectures) at TPM, NISER, Bhubaneswar (May-June, 2018)

• Representations of integers as sums of squares and modular forms, UGC State level Seminar on "Recent trends in Mathematics and it's applications",  B. B. Auto. Mahavidyala, Chandikhole (March 24, 2018)
  

• Symmetry in Sciences (4 lectures) at Refreshers Course in Basic Sciences, Sambalpur University (March 16--17, 2018)
  

• Ramanujan and Tau function, Faculty Development Program on Computational Mathematical Methods and their application in enginneering -2016, CVRCE, Bhubaneswar (December 12-18, 2016)
  

• Group Theory (6 lectures) at SOPM, NISER, Bhubaneswar (June, 2015)
  

• Groups and Symmetry (6 lectures) at AFS-I, NISER, Bhubaneswar (December 2014)
  

• Complex Analysis in Number Theory (4 lectures) at TEW on Complex Analysis, Vivekananda College, Burdwan (December 27-31, 2013)  

• Symmetry (2 lectures) at Workshop in Excitement in Physics, North Odisha University, Baripada (June 3-7,  2013)

• Representations of integers as sums of squares and modular forms, UGC aided Seminar, F. M. College, Balasore (March 17, 2012)