| Invited
talks |
| |
| |
Conformal Spaces. Geometry Seminar,
Department of Mathematics, University of Toronto, Canada, February 1979 |
| Cone Preserving Mappings. Workshop in Geometry
and Algebra, Technical University of Munich, W. Germany, February 1980 |
| Characterizations of Lorentz Transformations. Geometry
Colloquium, Mathematics Institute, University of Hannover, W. Germany,
June 1980 |
| Characterizations of Spacetime Transformations. Mathematics
Colloquium. York University, Toronto, Canada, February 1983 |
| Characterization Theorems on Metric Vector Spaces.
Geometry Seminar, Department of Mathematics, University of Toronto,
Canada, September 1985 |
| Some Characterizations of Euclidean Motions. Mathematics
Colloquium, University of Oldenburg, W. Germany, November 1985 |
| Transformations Preserving Null Line Sections of
a Domain. Mathematics Colloquium, University of Duisburg, W. Germany,
November 1985 |
| Mappings Preserving Null Line Sections of a Domain.
Mathematics Colloquium, University of Hannover,W. Germany, November
1985 |
| A Characterization of Conformal Metric Vector Space
Transformations. Geometry Workshop,Technical University of Munich, W. Germany,
November 1985 |
| A Characterization of Conformal Transformations for
a Space of Arbitrary Signature. Geometry Seminar, University of Rome,
Italy, November 1985 |
| Transformations Preserving Null Line Sections of
a Domain. University of Florence, Italy, November 1985 |
| Some Beckman-Quarles Type Characterization Problems
from Euclidean Geometry. Catholic University of the Sacred Heart, Brescia,
Italy, November 1985 |
| Characterizations of Geometric Mappings Under Mild
Hypotheses. Geometry Workshop, University of Hamburg, W. Germany,
November 1985 |
| Application of Metric Vector Space Geometry to the
Derivation of Spacetime Transformations. University of Guelph, Canada,
March 1987 |
| Metric Vector Spaces and Spacetime Geometry. University
of Winnipeg, Canada, March 1987 |
| Relative Infinity in Geometry and Spacetime Geometry.
University of Victoria, Canada, July 1990 |
| Infinite But Not Absolute. Geometry Colloquium,
University of Toronto, January 1991 |
| Relative Infinity in Classical Geometry and Relative
Infinity in Spacetime Geometry (2 talks). Geometry Workshop, University
of Hamburg, Germany, May 1991 (as a visiting Blaschke Professor) |
| Centres of Triangles. Geometry Colloquium, University
of Hamburg, Germany, June 1992 |
| Euclidean Triangle Geometry via Complex Triangle
Functions. University of Victoria, Canada, August 1993 |
| A generalization of Napoleon's theorem to n-gons.
Geometry Workshop, University of Hamburg, Germany, July 1994 |
| The Universe is 25 Billion Years Old, or How to Get
Interesting Physics from Classical Inversive Geometry. Simon Fraser
University, Burnaby, Canada, February 1996 |
| Geometry, Computers and the Internet. University
of Hamburg, Germany, June 1997 |
| Conference
talks, etc. |
| |
| |
Conformal Minkowski Space. Conference
on the Foundations of Geometry, Mathematical Research Institute at Oberwolfach,
W. Germany, May 1980 |
| NATO Advanced Study Institute Summer School on "Geometry
- von Staudt's Point of View"; Bad Windsheim, W. Germany, July
1980 (no talk) |
| A Physical Characterization of Conformal Transformations
of Minkowski Spacetime. Conference on Combinatorial Geometries and Their
Applications, Rome, June 1981 |
| The Beckman-Quarles Theorem in Minkowski Space for
a Spacelike Square- Distance. Tenth Austrian Conference of Mathematicians,
Innsbruck, September 1981 |
| Transformations of de Sitter and Einstein Cylinder
Spacetimes Preserving Separation. Conference on the Foundations of Geometry,
Mathematical Research Institute at Oberwolfach, W. Germany, October
1982 |
| Transformations Preserving Unit Triangles. Conference
on the Foundations of Geometry, Mathematical Research Institute at Oberwolfach,
W. Germany, October 1985 |
| Relative Infinity in de Sitter Spacetime Geometry.
Combinatorics '86, La Mendola, Italy, July 1986 |
| Spacetime Geometry via Metric Vector Space Models.
Annual Meeting of the German Mathematical Association, Berlin, W. Germany,
September 1987 |
| A Beckman-Quarles-Type Theorem for Coxeter's Inversive
Distance. Conference on the Foundations of Geometry, Mathematical Research
Institute at Oberwolfach, W. Germany, December 1988 |
| The Effect of a Relative Infinity on
Cosmological Redshifts. Conference on Relativity and Astrophysics, Victoria,
Canada, May 1989 (poster) |
| Relative Infinity in Geometry. Third International
Conference on Geometry. Thessaloniki, Greece, May 1991 |
| The Preservation of Causality on FLRW Spacetimes.
Geometry Conference in Hamburg, Germany, July 1992 |
| Geometric Centres of Triangles. St. Andrews Colloquium,
St Andrews, Scotland, July 1992 |
| Centre Functions for Triangles. Conference on
the Foundations of Geometry, Mathematical Research Institute at Oberwolfach,
Germany, January 1993 |
| Zeeman's Theorem on Robertson-Walker Spacetimes.
Fifth Canadian Conference on General Relativity and Relativistic Astrophysics,
Waterloo, Canada, May 1993 |
| A generalization of Napoleon's theorem to n-gons.
(poster) International Congress of Mathematicians, Zürich, August
1994 |
| In addition to the
talks listed above, I have also presented contributed talks to the regular
meetings of the Canadian Mathematical Society and the American Mathematical
Society. |