Conference Presentations

Conference Presentation List:

( Use * to denote the speaker)   

1. Wei-Shih Du, On multi-comparatively quasi-contractions: New existence results and applications, Research Institute for Mathematical Sciences (RIMS) Workshop "Study on Nonlinear Analysis and Convex Analysis", Research Institute for Mathematical Sciences, Kyoto University, Room  420, Japan, September 24-26, 2025. (Invited Speaker)

2. Wei-Shih Du, New existence results for essential vectorial lower semicontinuous and adjustability convex vector-valued with their applications, 2025 International Workshop on Nonlinear Analysis and its Applications (iwNAA2025, for short), Atılım University,  Gölbaşı, Ankara, Türkiye, September 3-5, 2025. (Keynote Speaker)

3. Wei-Shih Du, On generalized Meir-Keeler type conditions: New existence results and applications, 2025 Taiwan-Japan Joint Workshop on Nonlinear Analysis and Optimization (TJWNAO2025, for short), Akita Prefectual University (APU),  Yurihonjo, Akita, Japan, June 27-28, 2025. (Invited Speaker)

4. Wei-Shih Du, New existence results and applications for vector-valued functions with essential vectorial semicontinuity and adjustability convexity, Mini Workshop on Nonlinear Analysis and Optimization, Department of Mathematics, National Taiwan Normal University, Taipei, Taiwan, June 20, 2025. (Invited Speaker)

5. Wei-Shih Du, On multi-comparatively quasi-contractions with applications, Mini Optimization Workshop, Department of Mathematics, National Taiwan Normal University, Taipei, Taiwan, June 3, 2025. (Invited Speaker)

6. Wei-Shih Du, New generalizations of integral inequalities and their applications, 2025中華民國數學會年會, Department of Mathematics, National Central University, Taoyuan City, Taiwan, January 14-15, 2025. (Invited Speaker)

7. Wei-Shih Du, On essential vectorial semicontinuity and adjustability convexity: Existence results and applications, Research Institute for Mathematical Sciences (RIMS) Workshop "Study on Nonlinear Analysis and Convex Analysis", Research Institute for Mathematical Sciences, Kyoto University, Room 111, Japan, December 9-11, 2024. (Invited Speaker)

8. Wei-Shih Du, New integral inequalities and generalizations with their applications, Mini-workshop on convex analysis and optimization for young scholars, Toho University, Japan, December 6, 2024. (Invited Speaker)

9. Wei-Shih Du, New existence theorems for vector-valued functions with essential vectorial semicontinuity and adjustability convexity, The 5th International Congress on Natural Sciences with Sisterhood Universities (ICNS 2024, for short), Niigata University, Japan, September 26-28, 2024. (Invited Speaker)

10. Wei-Shih Du, On new integral inequalities, generalizations and applications, International Conference on Applied Mathematics (ICAM 2024, for short), Ton Duc Thang University, Ho Chi Minh City, Vietnam, July 11-13, 2024. (Invited Speaker)

11. Wei-Shih Du, New fixed point theorems and simultaneous generalizations in fixed point theory, 2023 RIMS Workshop on Nonlinear Analysis and Convex Analysis, Research Institute for Mathematical Sciences, Kyoto University, Room 111, Japan, August 28-30, 2023. (Invited Speaker)

12. Wei-Shih Du, On a new integral inequality: Generalizations and applications,  An academic speech at Department of Mathematics, Faculty of Science, Niigata University, Japan, August 25, 2023. (Invited Speaker)

13. Wei-Shih Du, New fixed point theorems and simultaneous generalizations in fixed point theory, An academic speech at Department of Mathematics, Faculty of Science, Niigata University, Japan, August 25, 2023. (Invited Speaker)

14. Wei-Shih Du, Existence and uniqueness of zeros for vector valued functions with K-adjustability convexity and their applications, 2020中華民國數學會年會, Department of Mathematics, Fu Jen Catholic University, New Taipei City, Taiwan, December 5-6, 2020. (Invited Speaker)

15. Wei-Shih Du, New generalizations of Ekeland’s variational principle and well-known fixed point theorems with applications to nonconvex optimization problems, 2018中華民國數學會年會, Department of Mathematics, National Taiwan Normal University, Taipei, Taiwan, December 8-9, 2018. (Invited Speaker)

16. Wei-Shih Du, New generalizations of fixed point theorems of Caristi type and Mizoguchi-Takahashi type and their applications, The Sixth Asian Conference on Nonlinear Analysis and Optimization (NAO-Asia 2018, for short), Okinawa, Japan, November 5-9, 2018. (Invited Speaker)

17. Wei-Shih Du, Some generalizations of fixed point theorems of Caristi type and Mizoguchi-Takahashi type under relaxed conditions, The Eighth International Conference on Nonlinear Analysis and Optimization: Theory, Algorithms and Applications (ICNAO 2018, for short), Kunming City, Yunnan Province, China, July 24-27, 2018. (Invited Speaker)

18. Wei-Shih Du, New best proximity point theorems with applications to simultaneous generalizations of common fixed point theorems, 2017中華民國數學會年會, National Chiayi University, Chiayi, Taiwan, December 9-10, 2017. (Invited Speaker)

19. Wei-Shih Du, Some equivalent formulations of generalized Caristi's fixed-point theorem, 2017 International Conference on Topological Nonlinear Analysis (ICTNA 2017, for short), Guangzhou University, Guangdong, China, June 12-16, 2017.

20. Wei-Shih Du, On generalized Caristi’s fixed point theorem and its equivalence, The fifth Asian conference on Nonlinear Analysis and Optimization (NAO-Asia 2016, for short), Toki Messe, Niigata, Japan, August 1-6, 2016.

21. Wei-Shih Du, New existence results of best proximity points and fixed points for MT(λ)-functions with applications to differential equations, 2015中華民國數學會年會暨數學學術研討會, National University of Kaohsiung, Kaohsiung, Taiwan, December 19-20, 2015.

22. Wei-Shih Du, New existence results of best proximity points and fixed points for MT(λ)-functions, 2015 RIMS Workshop on Nonlinear Analysis and Convex Analysis, Research Institute for Mathematical Sciences, Kyoto University, Room-111, Japan,  September 7-9, 2015. (Invited Speaker)

23. Wei-Shih Du, On new generalizations of Smarzewski's fixed point theorem, The Fifth International Symposium on BANACH and FUNCTION SPACES 2015 (ISBFS 2015, for short), Kyushu Institute of Technology (KIT), Tobata Campus, Kitakyushu, Japan, September 2-6, 2015.

24. Wei-Shih Du, On new generalizations of Smarzewski's fixed point theorem, 2015 Workshop on nonlinear Analysis and Optimization, National Chiayi University, Taiwan, April 28, 2015. (Invited Speaker)

25. Wei-Shih Du, On new generalizations of Smarzewski's fixed point theorem, 2014數學學術研討會暨中華民國數學會年會, National Cheng Kung University, Tainan, Taiwan, December 6-7, 2014. (Invited Speaker) 

26. Wei-Shih Du*, Farshid Khojasteh, Yung-Nan Chiu, Some generalizations of Mizoguchi-Takahashi's fixed point theorem with new local constraints, ICM Satellite Conference 2014: The Fourth Asian Conference on Nonlinear Analysis and Optimization (2014ICM-NAO, for short), National Taiwan Normal University, Taipei, Taiwan, August 5-9, 2014.

27. Wei-Shih Du*, Erdal Karapinar, A note on Caristi type cyclic maps: related results and applications, 2014 Taiwan-Philippines Symposium on Analysis (2014TPSA, for short), National University of Kaohsiung (Garden Villa Hotel), Kaohsiung, Taiwan, March 30 - April 3, 2014. (Invited Speaker)

28. Wei-Shih Du*, Erdal Karapinar, A note on Caristi type cyclic maps: related results and applications, 2014 Workshop on Applied Analysis, Optimization and Their Applications, National Hsinchu University of Education, Hsinchu, Taiwan, March 24, 2014. (Invited Speaker)

29. Wei-Shih Du, New approachs to the existence of fixed points for Caristi type mappings without lower semicontinuity assumptions, The International Conference on Nonlinear Analysis and Optimization (ICNAO2013, for short), National Sun Yat-Sen University, Kaohsiung, Taiwan, December 20-22, 2013.

30. Wei-Shih Du, New existence results and generalizations for coincidence point and fixed point without global completeness, The 9th International Conference on Optimization: Techniques and Applications (ICOTA 9, for short), National Taiwan University of Science and Technology, Taipei, Taiwan, December 12-16, 2013.

31. Wei-Shih Du, On Caristi type maps and generalized distances with applications, 2013數學學術研討會暨中華民國數學會年會, National Sun Yat-Sen University, Kaohsiung, Taiwan, December 6-8, 2013. (Invited Speaker)

32. Wei-Shih Du, New approachs to the study of the existence of common fixed points for families of Caristi type mappings, The Eighth International Conference on Nonlinear Analysis and Convex Analysis (NACA2013, for short), Hirosaki University, Hirosaki, Aomori, Japan, August 2-6, 2013.

33. Wei-Shih Du, New existence results and generalizations for coincidence point and fixed point without global completeness, 2012數學學術研討會暨中華民國數學會年會, National Chiao Tung University, Hsinchu, Taiwan, December 7-9, 2012.

34. Zhenhua He, Wei-Shih Du*, Nonlinear algorithms approach to split common solution problems, 2012 Workshop on Nonlinear Analysis and Optimization, National Army Academy, Chung Li , Taiwan, November 23, 2012. (Invited Speaker)

35. Wei-Shih Du, On approximate coincidence point property and its applications to metric fixed point theory, The third Asian conference on Nonlinear Analysis and Optimization (NAO-Asia2012, for short), Kunibiki Messe, Matsue City, Shimane, Japan, September 2 - 6, 2012.

36. Wei-Shih Du, Some new coincidence point and fixed point theorems for nonlinear multivalued maps, 2012 The International Workshop on Nonlinear Analysis and Convex Analysis (RIMS NACA Workshop 2012, for short), the Research Institute for Mathematical Sciences attached to Kyoto University, Kyoto, Japan, August 29-31, 2012. (Invited Speaker)

37. Wei-Shih Du, On coincidence point and fixed point theorems for nonlinear multivalued maps, The International Conference on Mathematical Inequalities and Nonlinear Functional Analysis with Applications (MINFAA2012, for short), Gyeongsang National University, Chinju, Republic of Korea, July 25-29, 2012.

38. Wei-Shih Du, On directional hidden contractions and their applications, 2012 年數學分析研討會, National Changhua University of Education, Changhua, Taiwan, January 6, 2012. (Invited Speaker)

39. Wei-Shih Du, Fixed point theorems for directional hidden contractions and their applications, 2011 Workshop on Nonlinear Analysis and Optimization: Theory, Method and Applications, National Tsing-Hua University, Hsinchu, Taiwan, December 11-12, 2011.

40. Wei-Shih Du, On coincidence point and fixed point theorems for nonlinear multivalued maps, 2011數學學術研討會暨中華民國數學會年會, Chung Yuan Christian University, Chung Li, Taiwan, December 9-11, 2011.

41. Wei-Shih Du*, Shao-Xuan Zheng, Nonlinear conditions for coincidence point and fixed point theorems, 非線性分析研討會, National Hsinchu University of Education, Hsinchu, Taiwan, November 17, 2011.(Invited Speaker)

42. Wei-Shih Du, On generalized weakly directional contractions and approximate fixed point property with applications, The Seventh International Conference on Nonlinear Analysis and Convex Analysis (NACA2011, for short), Pukyong National University, Busan, Republic of Korea, August 2-5, 2011.

43. Wei-Shih Du, On approximate coincidence point property and its applications, The first International Symposium on Nonlinear Analysis and Convex Analysis, Tienhsiang Youth Activity Center , Tienhsiang, Hualian, Taiwan, March 26‐28, 2011.

44. Wei-Shih Du, Some new results and generalizations in metric fixed point theory, 2010 定點理論研討會, National Hsinchu University of Education, Hsinchu, Taiwan, December 23, 2010. (Invited Speaker)

45. Wei-Shih Du, New cone fixed point theorems for nonlinear multivalued maps with their applications, 2010數學學術研討會暨中華民國數學會年會, National Changhua University of Education, Changhua, Taiwan, December 10-12, 2010.

46. Wei-Shih Du, Some new results and generalizations in metric fixed point theory, The second Asian Conference on Nonlinear Analysis and Optimization (NAO-Asia 2010, for short), Royal Paradise Hotel & Spa, Patong beach, Phuket, Thailand, September 9-12, 2010.

47. Wei-Shih Du, Hybrid inclusion and disclusion systems with applications to equilibria and parametric optimization, The International Conference on Optimization, Simulation and Control (COSC 2010, for short), National University of Mongolia, Ulaanbaatar, Mongolia, July 25-28, 2010.

48. Wei-Shih Du, Some new results and generalizations in metric fixed point theory, The 4th International Conference on Fixed Point Theory, Variational Inequality and It's Approximation Algorithms, ChengduUniversity of Information Technology and Sichuan Agricultural University, Chengdu, China, July 16-19, 2010.

49. Wei-Shih Du, Hybrid inclusion and disclusion systems with applications to equilibria and parametric optimization, 2010 Workshop on Optimization Analysis and its Applications, Chung Yuan Christian University and National Tsing-Hua University, Taiwan, March 19-20, 2010. (Invited Speaker)

50. Wei-Shih Du, A note on cone metric fixed point theory and its equivalence, 2009數學學術研討會暨中華民國數學會年會, National Chung Cheng University, Chiayi, Taiwan, December 4-6, 2009.

51. Wei-Shih Du, Hybrid inclusion and disclusion systems with applications to equilibria and parametric optimization, NSC-NWO joint seminars on Generalized Convexity in Game Theory, National Sun Yat-Sen University, Kaohsiung, Taiwan, August 20, 2009. (Invited Speaker)

52. Lai-Jiu Lin, Wei-Shih Du*,From an abstract maximal element principle to optimization problems, stationary point theorems and common fixed point theorems, The 9th International Conference on Fixed Point Theory and Its Applications (ICFPTA 2009, for short), National Changhua University of Education, Changhua, Taiwan, July 16-22, 2009.

53. Lai-Jiu Lin, Wei-Shih Du*, From an abstract maximal element principle to optimization problems, stationary point theorems and common fixed point theorems, Workshop on Matrices and Operators (矩陣與算子研討會2009), National Sun Yat-Sen University, Kaohsiung, Taiwan, July 3-4, 2009. (Invited Speaker)

54. Wei-Shih Du, The extension of continuity and generalized results for set-valued maps in convex analysis, 2009年分析青苗研討會-悼念蕭勝彥教授(1945~2009), National Central University, Chung Li, Taiwan, May 2, 2009.

55. Wei-Shih Du, On versions of stationary point theorem for generated dynamical system and their applications, The Sixth International Conference on Nonlinear Analysis and Convex Analysis (NACA2009, for short), Tokyo Institute of Technology, Tokyo, Japan, March 27-31, 2009.

56. Wei-Shih Du, On abstract maximal element principles with applications to stationary point theorems for generated dynamical systems and others, International Symposium on Optimization and Optimal Control－Taiwan-Russia Joint Conference (ISO2C, for short), National Sun Yat-Sen University, Kaohsiung, Taiwan, February 2-6, 2009.

57. Wei-Shih Du, On some nonlinear problems induced by an abstract maximal element principle, 2008數學學術研討會暨中華民國數學會年會, National Tsing-Hua University, Hsinchu, Taiwan, December 19-21, 2008.

58. Wei-Shih Du, From an abstract maximal element principle to nonconvex minimizations, fixed point theorems and others in uniform spaces, The 4th Sino-Japanese Optimization Meeting (SJOM 2008, for short), National Cheng Kung University, Tainan, Taiwan, August 27-31, 2008.

59. Wei-Shih Du, On some nonlinear problems induced by an abstract maximal element principle, 9th International Symposium on Generalized Convexity and Generalized Monotonicity 2008 (GCM9, for short), National Sun Yat-Sen University, Kaohsiung, Taiwan, July 21-25, 2008.

60. Lai-Jiu Lin, Wei-Shih Du*, On common quasi-eigenvector problems, 2007數學學術研討會暨中華民國數學會年會, Academia Sinica, Taipei, Taiwan, December 21-24, 2007.

61. Lai-Jiu Lin, Wei-Shih Du*, Some generalizations of Mizoguchi-Takahashi's fixed point theorem, International Symposium on Nonlinear Analysis and Convex Analysis 2007 (ISNACA2007, for short), National Sun Yat-Sen University, Kaohsiung, Taiwan, November 22-24, 2007.

62. Lai-Jiu Lin, Wei-Shih Du*, On common quasi-eigenvector problems, Workshop on Nonlinear Analysis, National Changhua University of Education, Changhua, Taiwan, August 26-27, 2007.

63. Lai-Jiu Lin, Wei-Shih Du*, The equivalence of scalar and vectorial Ekeland's variational principles with applications, The Fifth International Conference on Nonlinear Analysis and Convex Analysis (NACA2007, for short), National Tsing-Hua University, Hsinchu, Taiwan, May 31-June 4, 2007.

64. Lai-Jiu Lin, Wei-Shih Du*, On maximal element theorems, variants of Ekeland's variational principle and their applications, 2007分析研討會, National Taitung University, Taitung, Taiwan, January 22-23, 2007.

65. Lai-Jiu Lin, Wei-Shih Du*, On maximal element theorems, variants of Ekeland's variational principle and their applications, 2006 數學學術研討會暨中華民國數學會年會, National Taiwan Normal University, Taipei, Taiwan, December 8-10, 2006.

66. Lai-Jiu Lin, Wei-Shih Du*, Systems of equilibrium problems with applications to new variants of Ekeland's variational principle, fixed point theorems and parametric optimization problems, 數學分析青苗研討會, National Changhua University of Education, Changhua, Taiwan, October 14-15, 2006.

67. Lai-Jiu Lin, Wei-Shih Du*, Ekeland’s variational principle, minimax theorems and existence theorems of nonconvex equilibria in complete metric spaces, 數學分析青苗研討會, National Changhua University of Education, Changhua, Taiwan, October 14-15, 2006.

68. Lai-Jiu Lin, Wei-Shih Du*, Systems of equilibrium problems with applications to systems of vectorial Ekeland's variational principles and systems of semi-infinite problems, NCTS Workshop on Analysis, National Dong Hwa University, Hualien, Taiwan, January 14-15, 2006.

69. Lai-Jiu Lin, Wei-Shih Du*, Generalized Ekeland’s variational principles and the existence of Nonconvex equilibria and minimax inequalities in complete metric space, The Fourth International Conference on Nonlinear Analysis and Convex Analysis (NACA2005, for short), Okinawa Convention Center, Okinawa, Japan, June 30- July 4, 2005.

70. Lai-Jiu Lin, Wei-Shih Du*, New equivalent formulations of generalized Ekeland's variational principles and the existence of nonconvex equilibria and minimax inequalities in complete metric spaces, NCTS Workshop on Functional Analysis, National SunYat-Sen University, Kaohsiung, Taiwan, December 25-28, 2004.

71. Lai-Jiu Lin, Wei-Shih Du*, Some equivalent formulations of generalized Ekeland's variational principle and their applications, The International Conference on Analysis and its Applications, National Changhua University of Education, Changhua, Taiwan, May 28-31, 2004.