A Note on Heegaard Splittings of Amalgamated 3-Manifolds
Let M be a compact orientable irreducible 3-manifold, and F be an essential connected closed surface in M which cuts M into two manifolds M1 and M2. If Mi has a minimal Heegaard splitting Mi = Vi∪Hi Wi with d(H1) + d(H2) ≥ 2(g(M0 + g(M2) - g(F)) + 1, then g(M) = g(M1) + g(M2) - g(F)....
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Veröffentlicht in: | Chinese annals of mathematics. Serie B 2011-05, Vol.32 (3), p.475-482 |
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Hauptverfasser: | , |
Format: | Artikel |
Sprache: | eng |
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Online-Zugang: | Volltext |
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Zusammenfassung: | Let M be a compact orientable irreducible 3-manifold, and F be an essential connected closed surface in M which cuts M into two manifolds M1 and M2. If Mi has a minimal Heegaard splitting Mi = Vi∪Hi Wi with d(H1) + d(H2) ≥ 2(g(M0 + g(M2) - g(F)) + 1, then g(M) = g(M1) + g(M2) - g(F). |
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ISSN: | 0252-9599 1860-6261 |
DOI: | 10.1007/s11401-011-0641-8 |