### Heegaard gradient and virtual fibers.

Maher, Joseph (2005)

Geometry & Topology

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Maher, Joseph (2005)

Geometry & Topology

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Eudave-Muñoz, Mario, Shor, Jeremy (2001)

Algebraic & Geometric Topology

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Li, Tao (2002)

Geometry & Topology

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Lee Rudolph (1985)

Revista Matemática Iberoamericana

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King, Simon A. (2001)

Geometry & Topology

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Krushkal, Vyacheslav S., Quinn, Frank (2000)

Geometry & Topology

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Burton, Benjamin A. (2004)

Experimental Mathematics

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Alexander Degtyarev, Vlatcheslav Kharlamov (1997)

Revista Matemática de la Universidad Complutense de Madrid

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We present a brief overview of the classification of real Enriques surfaces completed recently and make an attempt to systemize the known classification results for other special types of surfaces. Emphasis is also given to the particular tools used and to the general phenomena discovered; in particular, we prove two new congruence type prohibitions on the Euler characteristic of the real part of a real algebraic surface.

Kuperberg, Greg (2003)

Algebraic & Geometric Topology

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Georgi Ganchev, Vesselka Mihova (2013)

Open Mathematics

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On any space-like Weingarten surface in the three-dimensional Minkowski space we introduce locally natural principal parameters and prove that such a surface is determined uniquely up to motion by a special invariant function, which satisfies a natural non-linear partial differential equation. This result can be interpreted as a solution to the Lund-Regge reduction problem for space-like Weingarten surfaces in Minkowski space. We apply this theory to linear fractional space-like Weingarten...

Atsuhiro Nakamoto, Seiya Negami, Kyoji Ohba, Yusuke Suzuki (2016)

Discussiones Mathematicae Graph Theory

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The looseness of a triangulation G on a closed surface F2, denoted by ξ (G), is defined as the minimum number k such that for any surjection c : V (G) → {1, 2, . . . , k + 3}, there is a face uvw of G with c(u), c(v) and c(w) all distinct. We shall bound ξ (G) for triangulations G on closed surfaces by the independence number of G denoted by α(G). In particular, for a triangulation G on the sphere, we have [...] and this bound is sharp. For a triangulation G on a non-spherical surface...

Sedgwick, Eric (2001)

Algebraic & Geometric Topology

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Mellor, Blake, Melvin, Paul (2003)

Algebraic & Geometric Topology

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