Designation

Reader-F

Joining Date

Expiry of Tenure

Research Area

Functional Analysis

Education

**B.Sc.**: From Scottish Church College, University of Calcutta, India in 2006.**M.Sc.**: From the Indian Institute of Technology Guwahati, India in 2009.- Project title:
*Chain Conditions on Rings and Modules.* - Supervisor: Professor Anupam Saikia.

- Project title:
**Dr. rer. nat.**: From the Georg-August-Universität Göttingen, Germany in 2013.- Thesis Title: C*
*-quantum groups with projection*. - Supervisor: Professor Ralf Meyer.

- Thesis Title: C*

**Postdoctoral positions:**

- Visiting Scientist in the Statistics and Mathematics Unit, Indian Statistical Institute Kolkata during July -- September, 2016 and September -- December 2014, with Debashish Goswami.
- Fields-Ontario Postdoctoral fellow in the
- Fields Institute during January -- June, 2014.
- Department of Mathematics and Statistics, University of Ottawa during January -- June, 2015 with Benoît Collins.
- School of Mathematics and Statistics, Carleton University during July, 2015 -- June, 2016 with Matthias Neufang.

- Postdoctoral fellow in the DFG Reserch Training Group 1493 at the Mathematisches Institut, Georg-August-Universität Göttingen during October -- December, 2013 with Ralf Meyer.

**Employment:**

- Reader-F in the School of Mathematical Sciences (SMS), National Institute of Science Education and Research (NISER) Bhubaneswar, from July 2019.
- Assistant Professor in the School of Mathematical Sciences (SMS), National Institute of Science Education and Research (NISER) Bhubaneswar, from September 2016 to June 2019.

Research Interest

Topological Quantum Groups, Noncommutative Geometry, Operator Algebras.

Awards

- Indian National Science Academy (INSA) Medal for Young Scientists in 2020.
- Early Career Research Award (ECRA) by Science and Engineering Research Board (SERB), Department of Department of Science and Technology (DST), Govt. of India in 2017.
- NBHM postdoctoral fellowship in 2016 (not availed).
- Inspire faculty award by Department of Department of Science and Technology (DST), Govt. of India in 2016 (Session-I).
- Fields–Ontario Postdoctoral fellowship from The Fields Institute during January 2014 to June 2016 (with an academic leave from July to December 2014).
- Start-Up postdoctoral scholarship from he DFG research training group 1493 “Mathematical Structures in Modern Quantum Physics” at the Georg-August-Universität Göttingen during October 2013 to December 2013.
- Doctoral stipend from the DFG research training group 1493 “Mathematical Structures in Modern Quantum Physics” at the Georg-August-Universität Göttingen during October 2010 to September 2013.
- Qualification stipend from the DFG research training group 1493 “Mathematical Structures in Modern Quantum Physics” at the Georg-August-Universität Göttingen during October 2009 to September 2010.
- UGC-CSIR (NET) fellowship in Mathematical Sciences with Rank-30 in 2009.
- Institute Silver Medal on 11th convocation in 2009 for securing the 1st position in M.Sc. Mathematics and Computing.
- Merit-cum-means scholarship for securing first position in the first year of M.Sc. during 2008-2009 (not availed).
- Institute merit scholarship for securing first position in the first year of M.Sc. during 2008-2009.

Publications

- Ralf Meyer, Sutanu Roy, Stanisław Lech Woronowicz,
*Homomorphisms of quantum groups*, Münster J. of Math.**5**(2012), 1-24. - Ralf Meyer, Sutanu Roy, Stanisław Lech Woronowicz,
*Quantum group-twisted tensor products of C*-algebras*, Internat. J. of Math.**25**(2014), no.2 1450019, 37. - Sutanu Roy,
*Haagerup property for Drinfeld doubles*, Math. Proc. R. Ir. Acad.**115A**(2015), no. 1, 9. - Sutanu Roy,
*The Drinfeld double for C*-algebraic quantum groups*, J. Operator Theory**74**(2015), no. 2, 485--515. - Ralf Meyer, Sutanu Roy, Stanisław Lech Woronowicz,
*Quantum group-twisted tensor products of C*-algebras-II*, J. Noncommut. Geom.**10**(2016), no. 3, 459-888. - Paweł Kasprzak, Ralf Meyer, Sutanu Roy, Stanisław Lech Woronowicz,
*Braided quantum SU(2) groups***10**(2016), no. 4, 1611-1625. - Frank Roumen, Sutanu Roy,
*Duality for convex monoids*, Order**34**(2017), no. 2, 349–362. - Ralf Meyer, Sutanu Roy, Stanisław Lech Woronowicz,
*Semidirect products of C*-quantum groups: multiplicative unitaries approach*, Commun. Math. Phys.**351**(2017), no. 1, 249-282. - Debashish Goswami, Sutanu Roy,
*Faithful actions of locally compact quantum groups on classical spaces*, Lett. Math. Phys.**107**(2017), no. 7, 1375-1390 - Sutanu Roy, Thomas Timmermann,
*The maximal quantum group-twisted tensor product of C*-algebras*, J. Noncommut. Geom.**12**(2018), no. 1, 279-330 - Sutanu Roy, Stanisław Lech Woronowicz,
*Landstad-Vaes theory for locally compact quantum groups*, Internat. J. of Math.**29**(2018), no. 4, 1850028, 36 pp. - Jyotishman Bhowmick, Arnab Mandal, Sutanu Roy, Adam Skalski,
*Quantum symmetries of the twisted tensor products of C*-algebras*, Commun. Math. Phys.**368**(2019), no. 3, 1051-1085 - Ralf Meyer, Sutanu Roy,
*Braided multiplicative unitaries as regular objects*, Adv. Stud. Pure Math.**80**(2019), 151--178 - Deeptak Biswas, Kishan Deka, Amaresh Jaiswal, Sutanu Roy,
*Viscosity, nonconformal equation of state, and sound velocity in Landau hydrodynamics*, Phys. Rev. C**102**(2020), no. 1, 014912 - Sumana Bhattacharyya, Amaresh Jaiswal, Sutanu Roy,
*Chemical freeze-out systematics of thermal model analysis using hadron yield ratios*, Phys. Rev. C**103**(2021), no. 2, 024905 - Deeptak Biswas, Kishan Deka, Amaresh Jaiswal, Sutanu Roy,
*Dynamics of QCD matter-current status*, Internat. J. Modern Phys. E, 30 (2021), no. 02, 2130001 - Atibur Rahaman, Sutanu Roy,
*Quantum E(2) groups for complex deformation parameters*, Rev. Math. Phys.**33**(2021), no. 6, 2150021, 28 pp. - Ralf Meyer, Sutanu Roy, Braided free orthogonal quantum groups, Int. Math. Res. Not. IMRN
**12**(2022), 8890-8915 - Sutanu Roy, Braided quantum groups and their Bosonizations in the C*-algebraic framework, Int. Math. Res. Not. IMRN posted on 2022, (to appear in print)

Preprints

- Anshu, Suvrajit Bhattacharjee, Atibur Rahaman, Sutanu Roy,
*Anyonic quantum symmetries of finite spaces*[**arXiv:2207.08153**] - Suvrajit Bhattacharjee, Soumalya Joardar, Sutanu Roy,
*Braided quantum symmetries of graph C*-algebras*[**arXiv:2201.09885**] - Sutanu Roy,
*Homogeneous quantum symmetries of finite spaces over the circle group*[**arXiv:2105.01556v2**] - David Bücher, Sutanu Roy,
*Regularity for braided multiplicative unitaries*[arXiv:1411.4611]

Teaching

- MAT1325 3X - Calculus II and an Introduction to Analysis, May–August, 2015 at the University of Ottawa.
- M311 - Numerical Analysis, Even Semester 2016-2017 at NISER.
- M101 - Mathematics I, Odd Semester 2017-2018 at NISER.
- M311 - Numerical Analysis, Even Semester 2018-2018 at NISER.
- M101 - Mathematics I, Odd Semester 2018-2019 at NISER.
- M205 - Linear Algebra, Even Semester 2018-2019 at NISER.
- M401 - Functional Analysis, Odd Semester 2019-2020 at NISER.
- M453 - Advance Linear Algebra, Odd Semester 2019-2020 at NISER.
- M204 - Metric Spaces, Even Semester 2019-2020 at NISER.
- M401 - Functional Analysis, Odd Semester 2020-2021 at NISER.
- M204 - Metric Spaces, Even Semester 2020-2021 at NISER.
- M453 - Advance Linear Algebra, Odd Semester 2021-2022 at NISER.
- M557 - Operator Algebras, Even Semester 2021-2022 at NISER.
- M604 - Analysis-II, Odd Semester 2022-2023 at NISER

Responsibility

- Member, UGCS SMS.
- Member, Purchase Committee, SMS.
- Convener, Faculty Screening Committee, SMS.
- Warden, Bhagirathi Hostel

Project/Thesis Guidance

**Current group members:**- Atibur Rahaman (doctoral student currently ongoing from August 2017).
- Dr Anshu (Postdoctoral fellow currently ongoing from September 2020)

**Former members:**- Swadeepta Mandal [wrote M.Sc. thesis on 2022].
- Anagha Nair [wrote M.Sc. thesis on 2022].
- K Prahlad Narasimhan (jointly with Aritra Banik) [wrote M.Sc. thesis on 2022].
- Sai Sriharsha Indukuri [M.Sc. project students during 7th and 8th semester]
- Subhashree Patra (Project Assistant under SERB ECRA for one year from September, 2019)
- Seetalsmita Samal (Project Assistant under SERB ECRA for one year from September, 2019)
- Dr. Arnab Mandal (NISER PDF during February— August, 2017 and SERB-NPDF during September, 2017—August, 2017)
- Dr. Gayatri Pany (Research Associate under INSPIRE Faculty project during October 2017—April 2018)

Academic Presentations

**Conference/Workshop talks:**

**Invited***On braided compact quantum groups,*

Virtual Math Fest 2020, Institute of Mathematical Sciences Chennai, India, July 20, 2020.*Quantum E(2) groups and beyond,*

IISER-NISER Mathematics Webmeet 2020 (Operator Algebra/Theory session), Indian Institute of Science Education and Research Mohali, India, July 17, 2020.*Quantum E(2) groups for complex deformation parameter,*

Conference on Functional Analysis (CFA @IITB 2019), Indian Institute of Technology Bombay, India, October 18, 2019.*Braided quantum E(2) groups,*

Recent Advances in Operator Theory and Operator Algebras 2018 (OTOA 2018), Indian Statistical Institute Bangalore, India, December 14, 2018.*Braided compact quantum groups,*

2nd Inter IISER-NISER Math Meet 2018 (Analysis session), Indian Institute of Science Education and Research Bhopal, India, July 7, 2018.*Braided quantum group structure on quantum plane*, XXXVI Workshop on Geometric Methods in Physics, Białowież, Poland, July 6, 2017.*Braided C*-quantum groups and quantum plane*, Non-Commutative Analysis, Institute of Mathematical Sciences Chennai, India, February 7, 2017.*Braided free orthogonal quantum groups*, Recent Advances in Operator Theory and Operator Algebras (OTOA) 2016, Indian Statistical Institute Bangalore, India, December 19, 2016.*Intrinsic groups of double crossed products,*Workshop on Dynamical Systems and Operator Algebras, University of Ottawa, Canada, May 31, 2016.*Duality for convex monoids,*Winter meeting of the Canadian Mathematical Society in the Operator algebra session, Montreal, Canada, December 7, 2015.*Faithful actions of locally compact quantum groups on classical spaces,*Banach Algebras and Applications and Retrospective Meeting for the 2014 Thematic Program on Abstract Harmonic Analysis, Banach and Operator Algebras, Fields Institute, Canada, August 8, 2015.*Slices of braided multiplicative unitaries,*Summer meeting of the Canadian Mathematical Society in the C*–algebra session, Charlottetown, Canada, June 6, 2015.*Quasitriangular quantum group twisted tensor product of C*-algebras,*Fields workshop on Recent Developments in Quantum Groups, Operator Algebras and Applications, University of Ottawa, Canada, February 6, 2015.*The Haagerup property of the generalised Drinfel’d double,*Workshop on Operator Spaces, Locally Compact Quantum Groups and Amenability (Thematic Program on Abstract Harmonic Analysis, Banach and Operator Algebras), Fields Institute Toronto, Canada, May 29, 2014.*Quantum group with projection,*Quantum Geometry and matter, SISSA-Trieste, Italy, April 10, 2013.*Quasitriangular quantum groups and coaction category,*10th Geometry and Physics Conference "Quantum Geometry", Crete, Greece, August 7, 2012.*Homomorphisms of Quantum Groups,*Operator Algebras and Quantum Groups - conference in honor of S.L. Woronowicz’s seventieth birthday, Warsaw, Poland, September 20, 2011.

**Contributed***Homogeneous quantum symmetries of finite quantum spaces over the circle group,*

Quantum Groups and Algebraic Quantum Field Theory, A special session of the conference International Workshop on Operator Theory and its Applications (IWOTA), Lancaster, UK, August 20, 2021.*Quantum symmetries of the twisted tensor products of C*-algebras,*

"Noncommutative Geometry: Physical and Mathematical Aspects of Quantum Space- Time and Matter", SNBNCBS, Kolkata, India, November 29, 2018.*Quantum symmetries of the twisted tensor products of C*-algebras,*

18th Workshop: Noncommutative Probability, Operator Algebras, Random Matrices and Related Topics, with Applications, Będlewo, Poland, July 18, 2018.*Braided commutative representations of C*-algebras,*Canadian Operator Algebra Symposium (COSy), Fields Institute Toronto, Canada, June 23, 2014.*C*-Quantum group with projection*(Poster), SFB-Workshop Groups, Dynamical Systems and C*-Algebras, Münster, Germany, August 21, 2013.*Quasitriangular C*-quantum groups and braiding (Poster),*6th European congress of Mathematics, Krakow, Poland, July 3–4, 2012.*Semidirect product of C*-Quantum Groups,*Master class on Quantum Groups, Copenhagen, Denmark, March 8, 2012.*Homomorphisms of Quantum Groups,*7th International Conference Quantum Theory and Symmetries, Prague, Czech Republic, August 11, 2011.*Homomorphisms of Quantum Groups*, XXX Workshop on Geometric Methods in Physics, Białowież, Poland, June 26, 2011.

**Talks at the outreach events**

- A tale of a rotating needle of length one, at NISER Bhubaneswar on April 8, 2022.

**Seminars:**

**2022.**- Braided quantum symmetries of graph C*-algebras, APRG Seminar, Indian Institute of Science Bangalore, 8 June.
- Braided quantum symmetries of finite spaces, Mathematics Colloquium, TIFR Centre For Applicable Mathematics Bangalore, 7 June.
- Braided quantum symmetries of graph C*-algebras, Virtual quantum symmetry seminar, Department of Mathematics, Ohio State University, USA, 8 March.

**2021.**- Homogeneous quantum symmetries of finite spaces over the circle group, APRG Seminar (virtual), Indian Institute of Science Bangalore, November 17.

**2020.***Contraction and bosonisation*, Tokyo-Kyoto Joint Online Operator Algebra Seminar, November 12.*Compact quantum groups and their semidirect products*, Topological Groups, September 29.*Quantum group contraction and bosonisation*, Webinars on Operator Theory and Operator Algebras, September 16.

**2019.***Braided compact quantum groups: motivation and examples*, Department of Mathematics and Statistics, Indian Institute of Science Education and Research Kolkata, India, July 22.*Braided Quantum Groups in C*-algebraic framework*, School of Mathematics, Tata Institute of Fundamental Research Mumbai, India, May 24.*Quantum plane and duality*, Department of Mathematics, Indian Institute of Technology Bombay, India, February 22.

**2018.***Symmetries and Quantum Groups*, Center for Theoretical Studies, Indian Institute of Technology Kharagpur, India, November 26.*From CCR to quantum groups*, Center for Theoretical Studies, Indian Institute of Technology Kharagpur, India, August 24.*Semidirect product of groups and beyond*, Department of Mathematics, Indian Institute of Technology Guwahati, India, May 23.*Semidirect product of groups and beyond*, The Institute of Mathematical Sciences Chennai, India, March 19.*Quantum Symmetries of twisted tensor product of C*- algebras*, Stat-Math Unit, Indian Statistical Institute Kolkata, India, February 2.

**2016.***Semidirect product of compact quantum groups,*Department of Mathematics, Indian Institute of Science Education and Research Mohali, India, August 12.*Braided quantum SU(2) groups,*Stat–Math Unit, Indian Statistical Institute Delhi, India, August 8.*Multiplicative unitaries for locally compact groups,*Stat–Math Unit, Indian Statistical Institute, Kolkata, India, July 18.*Braided quantum SU(2) groups,*Operator algebra seminar, Fields Institute Toronto, Canada, June 7.*Semidirect product of compact quantum groups,*Department of Mathematics, Indian Institute of Technology Madras, India, May 10.*Braided quantum SU(2) groups,*Oberseminar AG-Speicher, Faculty of Mathematics, Universität des Saarlandes, Germany, February 16.*Landstad–Vaes theory for locally compact quantum groups,*Mathematics Institut, Georg-August-Universität Göttingen, Germany, February 10.*Quantum group-twisted tensor product of C*-algebras*, Analysis Seminar, University of Ottawa, Canada, January 13.

**2015.***Faithful actions of locally compact quantum groups on spaces,*Department of Mathematics and Statistics, University of New Brunswick, Canada, December 3.*Braided C*-quantum groups,*The Institute of Mathematical Sciences Chennai, India, November 9.*Landstad–Vaes theory for locally compact quantum groups,*Department of Mathematics, Indian Institute of Science Banglore, India, November 6.*Faithful actions of locally compact quantum groups on classical spaces,*Department of Mathematics, Indian Institute of Science Education and Research Bhopal, India, October 15.*The Drinfeld double for C*-algebraic quantum groups,*Stat–Math Unit, Indian Statistical Institute, Kolkata, India, March 13.*From Hopf algebras to locally compact quantum groups,*Logic seminar, Department of Mathematics and Statistics, University of Ottawa, Canada, February 27.

**2014.***Brided quantum SU(2) groups*Tata Institute of Fundamental Research, Mumbai, India, November 28.*A brief introduction to braided multiplicative unitaries*Department of Mathematics, Indian Institute of Technology, Delhi, India, October 17.*The Haagerup property of the Drinfeld doubles,*School of Physical Sciences, Jawaharlal Nehru University, India, October 16.*Quantum group-twisted tensor product of C*-algebras,*Department of Mathematics and Statistics, University of Ottawa, Canada, March 4.*Quantum group-twisted tensor product of C*-algebras,*Department of Pure Mathematics, University of Waterloo, Canada, February 20.*Quantum group-twisted tensor product of C*-algebras,*Operator algebra seminar, Fields Institute Toronto, Canada, February 6.

**2013.***Twisted tensor product of C*-algebras,*Stat–Math Unit, Indian Statistical Institute Delhi, India, October 25.*Associative twisted tensor product of C*-algebras*Department of Mathematics*,*Shiv Nadar University, India, October 10.*From locally compact groups to C*-quantum groups: multiplicative unitary approach,*Department of Mathematics, Indian Institute of Technology Ropar, India, October 9.*On braided multiplicative unitaries,*Department of Mathematical Methods in Physics, University of Warsaw, Poland, May 23.*Quantum groups with a projection,*Mathematical Institute of the Polish Academy of Sciences Warsaw, Poland, May 20.*Twisted tensor product of C*-algebras,*Department of Mathematics, Indian Institute of Science Education and Research Kolkata, India, April 3.*On braided multiplicative unitaries,*Stat–Math Unit, Indian Statistical Institute Kolkata, India, March 20.*On canonical commutation relation,*Department of Mathematics, Indian Institute of Technology Guwahati, India, March 19.*Twisted tensor product of C*-algebras,*Graduate School of Mathematical Sciences, The University of Tokyo, Japan, March 15.

**2012.***Universal Coefficient Theorems and assembly maps in KK-theory,*Oberseminar AG-Meyer, Mathematics Institut, Georg-August-Universität Göttingen, Germany, November 29.

**2011.***Category of locally compact quantum groups,*Chennai Mathematical Institute, India, December 20.*An overview of Grothendieck group construction and it’s application,*Indian Institute of Technology Guwahati, India, October 13.*Homomorphisms of quantum groups,*Colloquium of Gk 1493: "Mathematische Strukturen in der modernen Quantenphysik", Mathematics Institute, University of Göttingen, Germany, May 26.*Homomorphisms of quantum groups,*Department of Mathematical Methods in Physics, University of Warsaw, Poland, March 17.

**2010.***Morphisms of quantum groups via linking unitaries,*Indian Institute of Technology Guwahati, India, October 7.*Morphisms of quantum groups via linking unitaries,*Participant seminar talk at 7th Focused Semester: Quantum groups, Université de Caen, France, September 16.

Academic Visits

**Research Stays:**- Indian Institute of Science, from 1 to 12 June, 2022 hosted by Tirthankar Bhattacharyya.
- Theoretical Statistics and Mathematics Unit, Indian Statistical Institute Kolkata, from 9 to 13 May, 2022 hosted by Debashish Goswami.
- Theoretical Statistics and Mathematics Unit, Indian Statistical Institute Kolkata, from December 23, 2019 to January 1, 2020 hosted by Debashish Goswami.
- Theoretical Statistics and Mathematics Unit, Indian Statistical Institute Kolkata, from September 30 to October 5, 2019 hosted by Jyotishman Bhowmick.
- Department of Mathematics and Statistics, Indian Institute of Science Education and Research Kolkata, from July 22 to 23, 2019 hosted by Md. Ali Zinna.
- Department of Mathematics, Presidency University Kolkata, from June 6 to 14, 2019 hosted by Arnab Mandal.
- School of Mathematics, Tata Institute of Fundamental Research Mumbai, from May 26 to 31, 2019 hosted by Anish Ghosh.
- Theoretical Statistics and Mathematics Unit, Indian Statistical Institute Kolkata, from May 13 to 17, 2019 hosted by Debashish Goswami.
- Theoretical Statistics and Mathematics Unit, Indian Statistical Institute Kolkata, from April 17 to 19, 2019 hosted by Debashish Goswami.
- Mathematisches Institut, Georg-August-Universität Göttingen from February 25 to March 1, 2019 hosted by Ralf Meyer.
- Department of Mathematics, Indian Institute of Technology Bombay, from February 21 to 23, 2019 hosted by Bata Krishna Das.
- Theoretical Statistics and Mathematics Unit, Indian Statistical Institute Delhi, from December 24 to 28, 2018 hosted by Arup Kumar Pal.
- Jawaharlal Nehru Centre for Advanced Scientific Research, from December 10 to 13, 2018 hosted by Soumalya Joardar.
- Center for Theoretical Studies, Indian Institute of Technology Kharagpur from November 23 to 26, 2018 hosted by Sayan Kar.
- Theoretical Statistics and Mathematics Unit, Indian Statistical Institute Kolkata, from November 7 to 9, 2018 hosted by Debashish Goswami.
- Center for Theoretical Studies, Indian Institute of Technology Kharagpur from August 22 to 25, 2018 hosted by Bibhas Adhikari.
- Theoretical Statistics and Mathematics Unit, Indian Statistical Institute Kolkata, from August 14 to 17, 2018 hosted by Debashish Goswami.
- Instytut Matematyczny Polskiej Akademii Nauk Warsaw from July 9 to 13, 2018 hosted by Stanisław Lech Woronowicz.
- Theoretical Statistics and Mathematics Unit, Indian Statistical Institute Kolkata, from June 25 to July 3, 2018 hosted by Jyotishman Bhowmick.
- Department of Mathematics, Indian Institute of Technology Guwahati, from May 21 to 25, 2018 hosted by Arup Chattopadhyay.
- Theoretical Statistics and Mathematics Unit, Indian Statistical Institute Kolkata, from May 16 to 18, 2018 hosted by Debashish Goswami.
- The Institute of Mathematical Sciences Chennai, India, from March 24 to April 1, 2018 hosted by Partha Sarathi Chakraborty.
- Theoretical Statistics and Mathematics Unit, Indian Statistical Institute Kolkata, from February 24 to March 4, 2018 hosted by Debashish Goswami.
- Theoretical Statistics and Mathematics Unit, Indian Statistical Institute Kolkata, from December 11 to 15, 2017 hosted by Debashish Goswami.
- Theoretical Statistics and Mathematics Unit, Indian Statistical Institute Kolkata, from October 3 to 6, 2017 hosted by Swagato Kumar Ray.
- Instytut Matematyczny Polskiej Akademii Nauk Warsaw from July 28 to 30, 2017 invited by Stanisław Lech Woronowicz.
- Theoretical Statistics and Mathematics Unit, Indian Statistical Institute Kolkata, from June 5 to 11, 2017 invited by Jyotishman Bhowmick.
- Theoretical Statistics and Mathematics Unit, Indian Statistical Institute Delhi, from May 15 to 19, 2017 invited by Arup Kumar Pal.
- Theoretical Statistics and Mathematics Unit, Indian Statistical Institute Kolkata, from April 24 to 27, 2017 invited by Debashish Goswami.
- Theoretical Statistics and Mathematics Unit, Indian Statistical Institute Delhi, from August 4 to 10, 2016 invited by Arup Kumar Pal.
- Theoretical Statistics and Mathematics Unit, Indian Statistical Institute Kolkata, from March 28 to May 20, 2016 invited by Debashish Goswami.
- Faculty of Mathematics, Saarland University from February 14 to 18, 2016 hosted by Moritz Weber.
- Mathematisches Institut, Georg-August-Universität Göttingenfrom February 1 to 14, 2016 hosted by Ralf Meyer.
- Department of Mathematics and Statistics, University of New Brunswick from November 29 to December 3, 2015 hosted by Dan Kucerovsky.
- Research in Pairs (jointly with Stanisław Lech Woronowicz) at the Mathematisches Forschungsinstitut Oberwolfach from August 3 to 30, 2014.
- Visiting Researcher at the Mathematisches Institut, Georg-August-Universität Göttingen from July 1 to 29, 2014 hosted by Ralf Meyer.
- Several one week or two weeks research stays at the Fachbereich Mathematik und Informatik,Westfälische Wilhelms-Universität Münster between August 2013 and January 2016 hosted by Thomas Timmermann.
- Graduate School of Mathematical Sciences, The University of Tokyo from February 17 to March 16, 2013 hosted by Yasuyuki Kawahigashi.
- Several one week research visits to the IMPAN and Katedra Metod Mathematycznych Fizyki, University of Warsaw between March, 2010 and May, 2013 hosted by Stanisław Lech Woronowicz.
- Several one week and one month research visit to the Theoretical Statistics and Mathematics Unit, Indian Statistical Institute Kolkata, between December, 2010 and March, 2015 hosted by Debashish Goswami.

**Conference and Workshop participations (without presentations):**- Workshop on New Directions in Inverse Semigroups, Ottawa, Canada, 2016.
- Winter school on Isomorphism conjecture and Geometry of Groups, Münster, Germany,January 2016.
- Noncommutative Geometry and Spectral Invariants, Montreal, Canada, 2015.
- Noncommutative geometry and quantum groups, Oslo, Norway, 2012.
- EU-NCG 4th Annual Meeting, Bucharest, Romania, April, 2011.
- K-Theory, C*-Algebras and Index Theory, Göttingen, Germany, November 2010.
- Workshop on Quantum groups and physics, Caen, France, September 2010.
- Conference Quantum Groups, Clermont-Ferrand, France, August-September 2010.
- 8th Annual Spring Institute on Noncommutative Geometry and Operator Algebra -Von Neumann Algebras, Vanderbilt University, Nashville, USA, May 2010.
- Workshop on Multiplicity Conjectures, Resolution of Singularities and Toric Geometry, Indian Institute of Technology Madras, India, December 2008 – January 2009.
- Research Workshop in Optimization Theory and Applications, Indian Institute of Technology Kanpur, India September 2008.

Sponsored Projects

- MATRICS by by Science and Engineering Research Board (SERB), Department of Department of Science and Technology (DST), Govt. of India in 2017. Duration: December 2020 -- December 2023.
- Early Career Research Award (ECRA) by Science and Engineering Research Board (SERB), Department of Department of Science and Technology (DST), Govt. of India in 2017. Duration: March 2018 -- March 2021.
- Inspire faculty award by Department of Department of Science and Technology (DST), Govt. of India in 2016 (Session-I). Duration: December 2016 -- December 2021.