Riv.Mat.Univ.Parma (5) 1 (1992)


Grafi planari di S3 e movimenti di Whitehead

Pages: 65-75
Received: 6 November 1991
Mathematics Subject Classification: 05C10

Abstract We show that a graph Γ embedded in S sup>3 can be made planar via isotopies and Whitehead moves (including slides), if and only if the fundamental group of its complement is free.