Canad. Math. Bull. 40(1997), 471-474
Printed: Dec 1997
The purposen of this paper is to present a short, self-contained
proof of Euler's relation. The ingredients of this proof are (i) the
principle of inclusion and exclusion of combinatorics and (ii) the
Euler characteristic; a development of the Euler characteristic is included.
52A25 - unknown classification 52A25