连锁曲面[Desmic Surface] - 达人(其实～我是卧底，来自外星)

2005/02/09 | 连锁曲面[Desmic Surface]
类别(∑〖数学〗) | 评论(0) | 阅读(20) | 发表于 13:24: Let ,, and be tetrahedra in projective three-space . Then the tetrahedra are said to be desmically related if there exist constants ,, and such that

A desmic surface is then defined as a quartic surface which can be written as

for desmically related tetrahedra ,,and . Desmic surfaces have 12 ordinary double points, which are the vertices of three tetrahedra in three-space (Hunt 1996).; 0