1. "Banach limits and matrix transfomations", at Eotvos Lorand University, Budapest, **Hungary**
(November 29, 1993).

2.
"Almost convergence and related concepts", at Bolyai Institute, University of Szeged, **Hungary
**(December 9, 1993).

3. "Matrix
transformations and core theorems",

at Sakarya
University, Sakarya, **Turkey** (October 8, 2001).

4. " Double
sequences and matrix transformations",

at
Yüzüncü Yil University, Van, **Turkey **(October 18, 2001).

The following
talks (5-10) were given at Chiang Mai University, Chiang Mai,**Thailand** in a two day Seminar on "Summability Methods
and Matrix Transformation", (August 26-27, 2002)

5. "Summability
methods (Classical and Modern)"

6. "*FK*-spaces
and matrix transformations"

7. "Köthe-Toeplitz duals of classical sequence spaces"

8. "The
spaces related to *lp* and matrix transformations"

9. "Banach
limits and almost convergence"

10. "Measures
of noncompactness and applications to sequence spaces and matrix transformations"

--------------------------------------------------------------

11. "Almost
strongly regular matrices and a core theorem for double sequences" at
the University of Niş, **Yugoslavia**
(September 27, 2003).

12. "Some
geometric properties of some new sequence spaces" at Firat University, **Turkey **(June
8, 2007).

13. "Statistical
Summability Methods" at Firat University, **Turkey** (June 15, 2007).

14. "Geometric properties of a Banach sequence space m*(**φ**,p)* related to *l**p*"
at the University of Zurich, **Switzerland** (July 16, 2007 ).

15. "Sequence spaces of invariant means and some matrix transformations" at Imperial College London, **UK**
(July 13-18, 2009).

16.
"Some topological concepts in IFNS" at Yildiz Technical University, Istanbul, **Turkey** (July
01, 2010).

17. "Almost convergence and related methods" at Istanbul Commerce University, Istanbul, **Turkey**
(July 05, 2010).

18. "Matrix transfprmations and compact operators" at Fatih University,
Istanbul, **Turkey** (July 12, 2010).

19. "Hausdorff measure of noncompactness" at Maltepe
University, Istanbul, **Turkey** (July 15, 2010).

20. "Applications of the Hausdorff
measure of noncompactness in some new sequence spaces" at the Chulalongkorn University, Bangkok, **Thailand**
(December 7, 2010).

21. "Korovkin type approximation theorem for almost convergence
and statistical convergence" at King Abdul Aziz University, Jeddah, KSA (May 17, 2011)

22. "Compactness
by the Hausdorff measure of noncompactness" in "Mathematics Day" at King Abdul Aziz University, Jeddah, KSA (May 29, 2011)

23. "Lacunary statistical convergence and approximation" in the "Work Shop on Mathematical Analysis" at Tabuk University,
Tabuk, KSA (May 31, 2011)

24. "Compact operators on some BK spaces related to the l_{p} spaces" in the
"International Conference on Applied Analysis And Algebra" at the Yildiz Technical University, Istanbul, Turkey (June 30,
2011)

25. "Almost convergence and matrix transformations" in the "International Conference on Fixed
Point Theory And Applications" at Tabuk University, Tabuk, KSA (May 26--27, 2012)

26. "Statistical convergence"
at University Putra Malaysia, Malaysia (September 14, 2012)

The following talks (27)-(29) were given
at University Putra Malaysia in a one day Workshop on "Sequence Spaces And Convergence Problems", ( September 18, 2012 ):

27. "FK Spaces"

28. "Applications of the measure of noncompactness in matrix transformations on some
sequence spaces"

29. "Almost convergence and compact operators"

30. National Conference
(March 15-March 16, 2013): Keynote Speaker in the "National Conference on Algebra, Analysis And Applications" at the Shri
Mata Vaishno Devi University, Katra, Jammu.

31. "Korovkin type approximation theorems through almost
convergence and statistical convergence" in the "Western Balkan Conference of Mathematical Sciences" at the University of
Elbasan, Albania (May 30- June 01, 2013).

32. "Almost conservative matrices and compact operators" in
the "International Conference on Applied Analysis And Mathematical Modeling " at the Yildiz Technical University, Istanbul
(June 02-June 05, 2013).

33. Talk "Statistical approximation" at Afyon University, Turkey (August 27,
2013).

34. Talk "Generalized equi-statistical convergence of positive linear operators" at Sakarya University,
Turkey (September 05, 2013).

35. Keynote Speaker "Infinite system of differential equations in some
BK spaces" in The Algerian-Turkish International days on Mathematics 2013 (September 12-14, 2013) Fatih University, İstanbul,
Turkey.

36. Invited Speaker "Compact matrix operators between some sequence spaces" in the International
Conference on Nonlinear Analysis And Optimization (December, 20-22, 2013) at National Sun Yat-sen University, Kaohsiung, Taiwan.

37.
Invited Speaker in the International Conference and Workshop on Mathematical Analysis 2014 (May 27-30, 2014) at University
Putra Malaysia.

38. Invited Speaker "On some applications of measures of noncompactnesst " in the Second International Conference on Analysis
And Applied Mathematics (September 11--13, 2014) at M. Auezov South Kazakhstan State University, Shymkent, Kazakhstan.

39.
Invited Talk "Measures of Noncompactness And Applications" in the International Conference on Algebra, Geometry, Analysis
And Their Applications (November 27--29, 2014) at Jamia Millia Islamia, New Delhi.

40. Invited Talk
"Measures of Noncompactness And Applications to Differetial And Integral equations" (Feb. 19, 2015) at South Asian University,
New Delhi.

41. Plenary Talk "Compact Operators by Measures of Noncompactness" in the National Seminar
on Topological Algebraic Analysis (May 14--16, 2015) at University of Jammu, J & K.

42. Invited
Talk "Measures of Noncompactness And Their Applications" in the International Workshop on Algebra and Analysis (May 31--June
02, 2015) at University of Tabuk, Saudi Arabia.

43. Invited Talk "Some Summability Methods And Korovkin
Type Theorems" in the International Workshop on Algebra and Analysis (May 31--June 02, 2015) at University of Tabuk, Saudi
Arabia.

44. Keynote Speaker "Measures of Noncompactness With Applications to Differential Equations"
in the International Conference on Applied Analysis And Mathematical Modeling (June 08--12, 2015) at the Yildiz Technical
University, Istanbul.