VISIT & TALK
VISIT:
44. Department of Mathematics, University of Sharjah, Sharjah, UAE (26.01.2020--02.02.2020).
43. School of Mathematics and Statistics, Qinghai Normal University, China (03.01.2020--14.01.2020).
42. School of Mathematics and Statistics, Qinghai Normal University, China (04.07.2019--11.07.2019).
41. Department of Studies in Mathematics, University of Mysore, Mysuru-570006, India (26.06.2019--03.07.2019).
40. Department of Mathematics, Kuwait university, Kuwait (20.04.2019--27.04.2019).
39. Faculty of Mathematics and Statistics, Central China Normal University, Wuhan 430079, PR China (07.01.2019--10.01.2019).
38. School of Mathematics and Information Science, Yantai University, Yantai, 264005, P. R. China (03.01.2019--07.01.2019).
37. School of Science, Zhejiang University of Science and Technology, Hangzhou, Zhejiang, PR China (28.12.2018--03.01.2019).
36. Faculty of Mathematics and Physics, Huaiyin Institute of Technology, Huai’an, Jiangsu 223003, PR China (24.12.2018--28.12.2018).
35. School of Science, Zhejiang University of Science and Technology, Hangzhou, Zhejiang, PR China (19.12.2018--24.12.2018).
34. Department of Mathematics, University of Tarbiat Modares, Tehran, Iran (9.05.2018--13.05.2018)
33. School of Mathematics and Statistics, Qinghai Normal University, China (24.01.2018--29.01.2018)
32. School of Mathematics and Information Science, Yantai University, China (18.01.2018--23.01.2018)
31. College of Science, Nanjing University of Aeronautics & Astronautics, China (15.01.2018--18.01.2018)
30. School of Mathematics and Statistics, Qinghai Normal University, China (23.12.2017--15.01.2018)
29. CGANT, The University of Jember, Indonesia (26.11.2017--04.12.2017)
28. GERAD and HEC Montreal, Montreal QC, Canada (27.01.2017--26.02.2017)
27. Department of Mathematics, Mongolian National University of Education, Ulaanbaatar, Mongolia (21.08.2016--28.08.2016)
26. Center of Combinatorics, Nankai University, Tianjin, China (09.07.2016--14.07.2016)
25. Department of Mathematics, Shanghai University, Shanghai, China (01.07.2016--01.07.2016)
24. Department of Mathematics, East China University of Science and Technology, Shanghai, China (28.06.2016--03.07.2016)
23. Kragujevac University, Kragujevac, Serbia (21.05.2016--25.05.2016)
22. Universidade Federal do Rio de Janeiro, Brazil (18.02.2016--29.02.2016)
21. Instituto de Matemtica, UFRGS Avenida Bento Gonalves, Porto Alegre, RS, Brazil (11.02.2016--18.02.2016)
20. Department of Mathematics, Delaware University, USA (01.02.2016--10.02.2016)
19. Department of Mathematics, University of Kashan, Kashan, Iran (22.08.2015--24.08.2015)
18. Department of Mathematics, Shahid Rajaee, Teacher Training University, Tehran, Iran (19.08.2015--22.08.2015)
17. Department of Mathematics, Universiti of Putra Malaysia, Kuala Lumpur, Malaysia (24.06.2015--30.06.2015)
16. Department of Mathematics, South China normal University, Guangzhou, China (12.01.2015--12.01.2015)
15. Department of Mathematics, South China Agricultural University, Guangzhou, China (11.01.2015--18.01.2015)
14. Department of Mathematics, Shanghai University, Shanghai, China (08.01.2015--08.01.2015)
13. Department of Mathematics, East China University of Science and Technology, Shanghai, China (04.01.2015--11.01.2015)
12. Department of Mathematics, Yantai University, Yantai, China (27.12.2014--04.01.2015)
11.Dept. of Mathematics, Nanjing University of Aeronautics & Astronautics, China (23.12.2014--27.12.2014,18.01.2015--22.01.2015)
10. Department of Mathematics, Beijing Institute of Technology, Beijing, China (28.11.2014--01.12.2014)
9. Dept. of Mathematics, Nanjing University of Aeronautics & Astronautics, China (28.05.2014--01.06.2014)
8. Dept. of mathematics, Uludag University, Bursa, Turkey (16.08.2013--25.08.2013)
7. Vijayanagara Sri Krishnadevaraya University, Bellary, India (23.02.2013--25.02.2013)
6. Dept. of Mathematics, Nanjing University of Aeronautics & Astronautics, China (17.01.2013--05.02.2013)
5. Dept. of mathematics, Uludag University, Bursa, Turkey (22.08.2012--31.08.2012)
4. Dept. of mathematics, Selcuk University, Konya, Turkey (13.08.2012--21.08.2012).
3. Indian Statistical Institute, Kolkata, India (18.01.2011--30.01.2011).
2. The Institute of Mathematical Sciences (IMSc), India, (22.01.2008--01.02.2008).
1. Indian Statistical Institute, New Delhi, India (18.02.2007--24.02.2007).
Conference Talk/Invited Talk:
22. On eigenvalues of adjacency, Laplacian, Signless Laplacian and $A_{\alpha}$ matrix of graphs, Qinghai Normal University, Xining, P. R. China (10.01.2020).
21. On Independence Number and Metric Dimension of trees, CID 2019, 18th Workshop on Graph Theory, Piechowice, Poland (15.09.2019--20.09.2019).
20. Laplacian eigenvalues to Laplacian energy, 2019 The Workshop on the theory of graph spectra and hypergraphs, Qinghai, PR China (05.07.2019--06.07.2019).
19. On Laplacian eigenvalues and Laplacian energy of graphs, Department of Studies in Mathematics, University of Mysore, Mysuru-570006, India (27.06.2019--29.06.2019).
18. On Laplacian eigenvalues and Laplacian energy of graphs, 2018 Workshop on Graph Theory and its Applications, Hangzhou Jijin Hotel, School of Science, Zhejiang University of Science and Technology, Hangzhou, Zhejiang, PR China (21.12.2018--22.12.2018).
17. Comparison between topological indices of graphs, The Eight Conference And Workshop on Mathematical Chemistry (ECWMC 2018), University of Tarbiat Modares, Tehran, Iran (10.05.2018--11.05.2018)
16. On Laplacian eigenvalues and Laplacian energy of graphs, The First International Conference Combinatoric, Graph Theory and
Network Topology 2017, The University of Jember, Indonesia (24.11.2017--26.11.2017).
15. On energy, Laplacian energy and signless Laplacian energy of graphs, 12th Annual Meeting of the IAMC & 2016 ICMC, Nankai University, Tianjin, China (04.07.2016--08.07.2016).
14. On (Signless) Laplacian eigenvalues of graphs, Spectra of graphs and applications 2016, May 1820, 2016, Serbian Academy of Sciences and Arts, Belgrade, Serbia (18.05.2016--20.05.2016).
13. On Laplacian eigenvalues of graphs, 46th Annual Iranian Mathematics Conference (AIMC 46), Yazd University, Yazd, Iran (24.08.2015--29.08.2015).
12. Proof of conjectures on the distance signless Laplacian eigenvalues of graphs, Renmin University, Beijing, China (28.11.2014--30.11.2014) (The First International Conference on Big Data & Applied Stat.)
11. On Kirchhoff index, Laplacian energy and Laplacian-energy-like invariant of graphs, KSIAM, Jeju, South Korea (20.11.2014--23.11.2014)
10. Relation between energy of different matrices from graph, Shanghai Jio-Tang University, Shanghai, China (24.05.2014--28.05.2014) (The Eight Shanghai Conference on Combinatorics May 24th May 28, 2014 Shanghai)
9. Eigenvalues of graph matrices and graph parameters, Moscow State University, Russia (26.01.2014--02.02.2014) (Moscow Workshop on Combinatorics and Number Theory)
8. Relation between eigenvalues of the graph matrices and the graph parameters, Tohuku University, Japan (28.11.2013--01.12.2013).
7. Sharp bounds on the energy of graphs, Balikesir University, Turkey (12.08.2013--15.08.2013).
6. Eigenvalues and graph parameters, NCAAM, Reva Institute of Technology and Management, Bangalore, India (22.02.2013).
5. The number of spanning trees of a graph, Bursa Conference, Turkey (23.08.2012).
4. On conjectures involving second largest signless Laplacian eigenvalue of graphs, KMS-AMS meeting, Seoul, Korea, December 2009.
3. Bounds on the degree distance of a graph, Combinatorics workshop, Sungkyunkwan Unibversity, Korea, August 2008.
2. On the conjecture for certain Laplacian integral spectrum of graphs, International Conference on Linear Algebra, Shanghai University, Shanghai, China, July 2007.
1. Laplacian Spectrum of a Graph, Workshop on Graph Theory and Combinatorics in Ballarat University, Australia, October 2004.
Talk:
35. On the properties of the topological indices of graphs, Department of Mathematics, University of Sharjah, Sharjah, UAE (29.01.2020).
34. Comparison between topological indices of graphs, Kuwait College of Science and Technology, Kuwait (25.04.2019).