THEORY AND APPLICATIONS OF CATEGORIES
|
2017年
/
32卷
关键词:
metric spaces;
synthetic differential geometry;
D O I:
暂无
中图分类号:
O29 [应用数学];
学科分类号:
070104 ;
摘要:
We present an axiomatic theory, based on the notions of metric space and space with a (first order) neighbour relation. The axiomatics implies a synthetic proof of Huygens' principle of wave fronts, as envelopes of a family of spheres. A model of the axiomatics is presented in terms of synthetic differential geometry (SDG)(1).