منابع مشابه
Recursion Relations in Semirigid Topological Gravity
A field theoretical realization of topological gravity is discussed in the semirigid geometry context. In particular, its topological nature is given by the relation between deRham cohomology and equivariant BRST cohomology and the fact that all but one of the physical operators are BRST-exact. The puncture equation and the dilaton equation of pure topological gravity are reproduced, following ...
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If a manifold possesses a group action, one can say much about its topology by using equivariant cohomolgy. In particular, the Atiyah-Bott localization formula allows one to derive facts about the manifold’s global properties from knowledge of its fixed loci. Localization has proved to be one of the most important techniques in Gromov-Witten theory. In this case, one studies maps of algebraic c...
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We state and prove a topological recursion relation that expresses any genus-g Gromov-Witten invariant of a projective manifold with at least a (3g − 1)-st power of a cotangent line class in terms of invariants with fewer cotangent line classes. For projective spaces, we prove that these relations together with the Virasoro conditions are sufficient to calculate the full GromovWitten potential....
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$L$-fuzzy rough sets are extensions of the classical rough sets by relaxing theequivalence relations to $L$-relations. The topological structures induced by$L$-fuzzy rough sets have opened up the way for applications of topological factsand methods in granular computing. In this paper, we firstly prove thateach arbitrary $L$-relation can generate an Alexandrov $L$-topology.Based on this fact, w...
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We present new recursion relations for tree amplitudes in gauge theory that give very compact formulas. Our relations give any tree amplitude as a sum over terms constructed from products of two amplitudes of fewer particles multiplied by a Feynman propagator. The two amplitudes in each term are physical, in the sense that all particles are on-shell and momentum conservation is preserved. This ...
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ژورنال
عنوان ژورنال: Journal of Algebraic Geometry
سال: 2010
ISSN: 1056-3911,1534-7486
DOI: 10.1090/s1056-3911-2010-00559-0