Vol. 225, No. 1, 2006

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The simplest branched surfaces for a foliation

Sandra Shields

Vol. 225 (2006), No. 1, 177–198
Abstract

Given a foliation F of a closed 3-manifold and a Smale flow ϕ transverse to F, we associate a “simplest” branched surface with the pair (F,ϕ), which is unique up to two combinatorial moves. We show that all branched surfaces constructed from F and ϕ can be obtained from the simplest model by applying a finite sequence of these moves chosen so that each intermediate branched surface also carries F. This is used to partition foliations transverse to the same flow into countably many equivalence classes.

Keywords
branched surface, foliation, transverse flow
Mathematical Subject Classification 2000
Primary: 57R30, 57M50
Secondary: 57M10, 57M20, 57N10
Milestones
Received: 4 May 2004
Revised: 5 November 2005
Accepted: 17 March 2006
Published: 1 May 2006
Authors
Sandra Shields
College of Charleston
66 George Street
Charleston SC
29424-1001