Improving the intersection of polyhedra in $3$-manifolds
Robert Craggs · Illinois Journal of Mathematics · 1968
CRAGGSthat no arc of diameter less than connects ap to pb without intersecting D. An equivalent condition is that for any simple closed curve J in E containing a neighborhood of p in ab there are simple closed curves in D arbitrarily near p which link J.Here the linking is homology linking with Z2 coefficients which is a symmetric form of linking.In [6, Sections 1-3] it is shown that the first condition implies the second, and the other implication follows from argu-