Boundary modelling with special representations (Q1335434)

The author discusses the different (mostly book keeping) problems that appear if one switches between different representations of boundaries of objects that are not \(PL\)-manifolds. In particular, he discusses representations where different elements of the parameter plane are mapped onto the same element in space and representations where only one side of an edge belongs to a defined object. Special attention is given to chamfering nonmanifold edges into manifold objects. The paper is descriptive.