1-formes ferm6es singuli6res et groupe fondamental - download pdf or read online

By Levitt G.

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Am. Math. Soc. : Normal subgroups with infinite cyclic quotient. Math. Sci. : Sur l'isotopie des formes fermhes en dimension 3. Invent. Math. : Foliations by planes. : On fibering certain 3-manifolds, Topology of 3-manifolds and related topics. : A norm for the homology of 3-manifolds. Mere. Am. Math. Soc. : The geometry and topology of 3-manifolds. : On fibering certain foliated manifolds over S 1.

Math. : Isotopie de formes fermSes en dimension trois. Invent. Malb. : A geometric invariant for discrete groups. : Travaux de Thurston sur les surfaces. : Fibrations over S 1 with pseudo-Anosov monodromy. : Realizing group automorphisms, in Group actions on manifolds. Contemp. Math. : VariSt6s feuillet6es. Ann. Sci. Norm. Super. Pisa, C1. , IV. Ser. : 3-manifolds. Ann. Math. Stud. 86 (1976) Princeton Univ. : Ergodicity of foliations with singularities. : On codimension one foliations defined by closed one forms with singularities.

4. Soit ~ une forme de rang >=2 dont le lieu singulier est de codimension >=3. Les conditions suivantes sont ~quivalentes: 1) La classe de cohomologie [co]~Hl(M, PQ est complete. 2) II existe ceP~ tel que, pour chacun des ouverts A4. . et Mc,§ la composante (unique) sur laquelle f n'est pas born~e engendre ~ I M (c'est alors vrai V c). 3) N(og) n'est pas vide, et tout chemin d'int~grale nulle & extr~mit~s dans N(o~) est homotope f u n chemin contenu dans une feuille. 4) N (~o) n' est pas vide, et sur le rev6tement universel M on a f - l ( c ) ~ - I ( N ( ~ ) ) connexe pour tout c~P~.

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1-formes ferm6es singuli6res et groupe fondamental by Levitt G.


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