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Persistence of Stratifications of Normally Expanded Laminations
Pierre Berger, Université Paris 13, Villetaneuse, France
A publication of the Société Mathématique de France.
Mémoires de la Société Mathématique de France
2013; 113 pp; softcover
Number: 134
ISBN-13: 978-2-85629-767-4
List Price: US$45
Member Price: US$36
Order Code: SMFMEM/134
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This manuscript complements the Hirsch-Pugh-Shub (HPS) theory on persistence of normally hyperbolic laminations and implies several structural stability theorems.

The author generalizes the concept of lamination by defining a new object: the stratification of laminations. It is a stratification whose strata are laminations. The main theorem implies the persistence of some stratifications whose strata are normally expanded. The dynamics is a \(C^r\)-endomorphism of a manifold (which is possibly not invertible and with critical points). The persistence means that any \(C^r\)-perturbation of the dynamics preserves a \(C^r\)-close stratification.

If the stratification consists of a single stratum, the main theorem implies the persistence of normally expanded laminations by endomorphisms, and hence implies the HPS theorem. Another application of this theorem is the persistence, as stratifications, of submanifolds with boundary or corners normally expanded. Several examples are also given in product dynamics.

As diffeomorphisms that satisfy axiom A and the strong transversality condition (AS) defines canonically two stratifications of laminations: the stratification whose strata are the (un)stable sets of basic pieces of the spectral decomposition. The main theorem implies the persistence of some "normally AS" laminations which are not normally hyperbolic and other structural stability theorems.

A publication of the Société Mathématique de France, Marseilles (SMF), distributed by the AMS in the U.S., Canada, and Mexico. Orders from other countries should be sent to the SMF. Members of the SMF receive a 30% discount from list.


Graduate students and research mathematicians interested in laminations.

Table of Contents

  • Introduction
  • Geometry of stratication of laminations
  • Persistence of stratications of laminations
  • Proof of the persistence of stratications
  • A. Analysis on laminations and on trellis
  • B. Adapted metric
  • C. Plaque-expansiveness
  • D. Preservation of leaves and of laminations
  • Bibliography
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