(1) USA (Tempa, Florida): International Conference
(August 19-26, 1992): Presented a paper in the First World Congress of Nonlinear Analysts.
(2)
Hungary: Visiting Scientist
(October 15-December 28, 1993) University of Szeged, Szeged
and Eotvos Lorand University , Budapest under Exchange Programme of Indian National Science Academy and Hungarian Academy
of Sciences.
(3) Turkey:
(i) Visiting Professor (September 1- October 29, 2001): Sakarya University (Sakarya) and Y. Y. University (Van) under the
UN Programme UNISTAR-TOKTEN of TUBITAK.
(ii) Visiting Professor (May 25-June 25, 2007): Firat University
(Elazig) and Inonu University (Malatya) under FUBAP.
(iii) Visiting Professor (June 20-July 18, 2010):
Yildiz Tech. Univ., Istanbul Ticaret Univ., Fatih Univ., and Malteppe Univ., Istanbul under TUBITAK.
(iv) International Conference (June 28-July 03, 2011): Plenary talk in the "International Conference on Applied Analysis And
Algebra" at the Yildiz Technical University, Istanbul.
(v) International Conference (June 02-June 05,
2013): Plenary talk in the "International Conference on Applied Analysis And Mathematical Modeling " at the Yildiz Technical
University, Istanbul.
(vi) Visiting Professor (August 19-September 14, 2013): Fatih University, Istanbul
under TUBITAK.
(vii) International Conference (September 12-14, 2013): Plenary talk "Infinite system
of differential equations in some BK spaces" in The Algerian-Turkish International days on Mathematics 2013, Fatih University,
İstanbul, Turkey.
(viii) International Conference (June
08-June 12, 2015): Keynote Speaker in the "International Conference on Applied Analysis And Mathematical Modeling " at the
Yildiz Technical University, Istanbul.
(4) Thailand:
(i) Visiting Professor (August 1-August 31, 2002): Chiang Mai University.
(ii) International Conference (December, 7-9, 2010): Contributed talk in the "International Conference on Mathematical Analysis
(ICMA 2010)" at Bangkok.
(5) Serbia: International Conference
(September 24-28, 2003): Invited talk and chaired a session in the "International Workshop on Modern Functional Analysis,
Operator Operator Theory,Summability and Applications (MFA-03)" at the University of Nis.
(6)
Switzerland: International Conference (July 16-20, 2007): Contributed talk in the "International Congress of Industrial
and Applied Mathematics (ICIAM 07)".
(7) UK: International Conference (July 13-18,
2009): Invited talk in the 7th International ISAAC Congress at Imperial College of London.
(8)
Saudi Arabia:
(i) Visiting Professor (May 16- June
13, 2011): Tabuk University, Tabuk.
(ii) Visiting Professor (May 18- June 04, 2012): Tabuk University,
Tabuk.
(iii) Visiting Professor (May 18- June 03, 2015): Tabuk University, Tabuk, and King Abdulaziz
University, Jeddah.
(9) Malaysia:
(i) Visiting Scientist (August 27- September 25, 2012): University Putra
Malaysia.
(ii) International Conference (May 27-30, 2014):
Invited talk in the International Conference and Workshop on Mathematical Analysis 2014 1 at University Putra Malaysia.
(11) Albania: International Conference (May 30- June 01, 2013): Invited
talk in the "Western Balkan Conference of Mathematical Sciences" at the University of Elbasan, Albania.
(12)
Taiwan: International Conference (December 20--22, 2013): Invited talk in the "International Conference on Nonlinear
Analysis And Optimization" at National Sun Yat-sen University, Kaohsiung,Taiwan.
(13) Kazakhstan: International Conference (September 11--13, 2014): Invited talk in the "Second International Conference
on Analysis And Applied Mathematics" at M. Auezov South Kazakhstan State University, Shymkent, Kazakhstan.