Vol. 55, No. 2, 1974

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Deforming p. l. homeomorphisms on a convex polygonal 2-disk

Chung-Wu Ho

Vol. 55 (1974), No. 2, 427–439
Abstract

It is shown that for each p.l. homeomorphism f on a convex polygonal disk which is pointwise fixed on the boundary of the disk, there exists a triangulation K of the disk such that f may be obtained by successively moving the vertices of K (with the motion being extended linearly to each triangle of K) in a finite number of steps such that no triangles will be collapsed in the process of motion. An algebraic interpretation of this result is also given.

Mathematical Subject Classification
Primary: 57C15
Secondary: 57A05
Milestones
Received: 26 February 1974
Published: 1 December 1974
Authors
Chung-Wu Ho