- "I always love to begin a journey on Sundays, because I shall have the prayers of the church, to preserve all that travel by land, or by water"
**Jonathan Swift**

- 1973 Invited lectures at the Conference on the Finite Element Method, University of Calgary.
- 1974 Research collaboration with Professor B N Sahney at the University of Calgary.
- 1975 Member of the international committee for Conference on Approximation Theory, University of Calgary, and gave an invited paper.
- 1976 Research collaboration with Professor A S B Holland and Professor B N Sahney at the University of Calgary.
- 1977 Gave seminar at the University of Hong Kong.
- 1978 Research collaboration with Professor E W Cheney, University of Texas at Austin.
- 1978 Member of the international committee for NATO ASI on Polynomial and Spline Approximation at the University of Calgary, and gave a paper.
- 1979 Series of invited lectures given as a main speaker to the 3rd Summer School on Computing Techniques in Physics, at the invitation of the European Physical Society and the Czechoslovak Academy of Science, held at Roznov, Czechoslovakia.
- 1979 Research collaboration with Professor A S B Holland at the University of Calgary.
- 1980 Gave paper at Conference on Approximation Theory, University of Texas at Austin.
- 1981 Gave paper at Workshop on Computational Problems in Complex Analysis held at Stanford University.
- 1982 Gave paper at International Conference on Approximation Theory, University of Edmonton.
- 1983 Gave series of lectures as Visiting Professor at the University of Missouri at Rolla and at St Louis.
- 1983 Research collaboration with Professor B L Chalmers at the University of California Riverside.
- 1983 Member of the international committee of NATO ASI, Memorial University, St John's, Newfoundland, and gave an invited paper.
- 1984 Gave paper at 1st International Conference on Fibonacci Numbers, University of Patras, Greece.
- 1985 Gave paper at the Conference on the Constructive Theory of Functions, Varna, Bulgaria.
- 1985 Gave paper at the American Math.Society Summer Meeting, University of Wyoming.
- 1985 Gave a series of invited lectures at Tianjin Normal University, China.
- 1985 Research collaboration with Professor S L Lee at Universiti Sains Malaysia.
- 1986 Gave seminars at the Bulgarian Academy of Sciences, Sofia.
- 1986 Research collaboration with Professor S L Lee at Universiti Sains Malaysia.
- 1987 Gave paper at the Conference on the Constructive Theory of Functions, Varna, Bulgaria.
- 1987 Research collaboration with Professor S L Lee at Universiti Sains Malaysia.
- 1988 Gave paper at the International Conference on Numerical Mathematics, Singapore.
- 1988 Gave paper at 3rd International Conference on Fibonacci Numbers, University of Pisa.
- 1988 Gave invited lectures at Xi'an Jiaotong University, Dalian University of Technology and Tianjin Normal University.
- 1988 Research collaboration with Professor S L Lee at Universiti Sains Malaysia.
- 1989 Gave seminars at the Universities of Lisbon and Coimbra.
- 1989 Visited the Bulgarian Academy of Sciences, Sofia.
- 1989 Research collaboration with Professor S L Lee at the National University of Singapore.
- 1989 Research collaboration with Professor D Elliott at the University of Tasmania.
- 1990 Gave paper at the 4th International Conference on Fibonacci Numbers, Wake Forest University, North Carolina.
- 1990 Research collaboration with Professor S L Lee at National University of Singapore.
- 1991 Member of the international committee for the NATO ASI on Approximation Theory and Spline Functions held at Maratea, Italy, and gave four lectures as a main speaker.
- 1991 Gave paper at the Conference on the Constructive Theory of Functions, Druzhba, Bulgaria.
- 1991 Series of invited lectures as a main speaker to the 9th Summer School on Computing Techniques in Physics at the invitation of the European Physical Society and the Czechoslovak Academy of Science, held in Moravia, Czechoslovakia.
- 1992 Research collaboration with Dr L Brutman at the University of Haifa, Israel.
- 1992 Research collaboration with Professor S L Lee at the National University of Singapore.
- 1994 Research collaboration with Professor Z F Kocak at Ege University, Bornova-Izmir, Turkey and gave postgraduate course on approximation theory.
- 1994 Member of the international committee for the NATO ASI on Approximation Theory and Spline Functions held at Maratea, Italy and gave three lectures as a main speaker.
- 1994 Member of the international committee for the 6th International Conference on Fibonacci Numbers, Washington State University and gave a paper.
- 1994 Gave seminars at Dokuz Eylul University, Izmir, Turkey.
- 1995 Research collaboration with Professor A Sri Ranga at UNESP, Campus de São José do Rio Preto; gave seminars there and also at USP Sao Carlos.
- 1995 Main speaker at the XVIII Congresso Nacional de Matematica Aplicada e Computacional, Curitiba, Brasil.
- 1997 Gave a talk at the Conference on the Occasion of David Elliott's 65th Birthday at the University of Tasmania.
- 1997 Gave seminars at the National University of Singapore, the Universiti Sains Malaysia (Penang) and the University of Malaya (Kuala Lumpur).