CORRADO TANASI
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.