principal kinematic formula;
translative integral geometry;
set of positive reach;
differentiable extension;
fractal set;
D O I:
10.1023/A:1004912401199
中图分类号:
O1 [数学];
学科分类号:
0701 ;
070101 ;
摘要:
An example of a pair of sets of positive reach is presented, violating a condition assuring the intersection of these sets to have positive reach for almost all translations of one of these sets. The same condition ensures the validity of a translative formula proved recently in Geom. Dedicata 57 (1995), 259-283.