Unusual formulae for the Euler characteristic
几何拓扑
2007-05-23 v1
摘要
Everyone knows that the Euler characteristic of a combinatorial manifold is given by the alternating sum of its numbers of simplices. It is shown that there are other linear combinations of the numbers of simplices which are combinatorial invariants, but that all such invariants are multiples of the Euler characteristic.
引用
@article{arxiv.math/0201178,
title = {Unusual formulae for the Euler characteristic},
author = {Justin Roberts},
journal= {arXiv preprint arXiv:math/0201178},
year = {2007}
}
备注
To appear in Journal of Knot Theory and its Ramifications