A curve of degree five with non-abelian fundamental group
نویسندگان
چکیده
منابع مشابه
On Irreducible Sextics with Non-abelian Fundamental Group
We calculate the fundamental groups π = π1(P rB) for all irreducible plane sextics B ⊂ P2 with simple singularities for which π is known to admit a dihedral quotient D10. All groups found are shown to be finite, two of them being of large order: 960 and 21600.
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Article history: Received 21 June 2016 Accepted 26 January 2017 Available online 30 January 2017
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We explain how a version of Floer homology can be used as an invariant of symplectic manifolds with b1 > 0. As a concrete example, we look at four-manifolds produced from braids by a surgery construction. The outcome shows that the invariant is nontrivial; however, it is an open question whether it is stronger than the known ones. On a symplectic manifold with nonzero first Betti number, there ...
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ژورنال
عنوان ژورنال: Topology and its Applications
سال: 1997
ISSN: 0166-8641
DOI: 10.1016/s0166-8641(96)00169-1