Triangulating topological spaces

  • Authors:
  • Herbert Edelsbrunner;Nimish R. Shah

  • Affiliations:
  • -;-

  • Venue:
  • SCG '94 Proceedings of the tenth annual symposium on Computational geometry
  • Year:
  • 1994

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Abstract

Given a subspaceX⊆Rd and a finite set S⊆Rd, we introduce the Delaunay simplicial complex, DX, restricted by X. Its simplices are spanned by subsetsT⊆S for which the common intersection of Voronoi cells meets X in a non-empty set. By the nerve theorem,⋃DX and X are homotopy equivalent if all such sets are contractible. This paper shows that ⋃DX and X are homeomorphic if the sets can be further subdivided in a certain way so they form a regular CW complex.