منابع مشابه
Notes on Certain ( 0 , 2 ) Correlation Functions
In this paper we shall describe some correlation function computations in perturbative heterotic strings that, for example, in certain circumstances can lend themselves to a heterotic generalization of quantum cohomology calculations. Ordinary quantum chiral rings reflect worldsheet instanton corrections to correlation functions involving products of elements of Dolbeault cohomology groups on t...
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These lectures, given at the 1992 Trieste Spring School, are devoted to some selected topics in N=2 σ-models on Calabi-Yau manifolds and the associated N=2 superconformal field theories. The first lecture is devoted to the “special geometry” of the moduli space of c = 9 N=2 superconformal field theories. An important role is played by the extended chiral algebra which appears in theories with i...
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We present explicit formulae for the eccentric connectivity index and Wiener index of 2-dimensional square and comb lattices with open ends. The formulae for these indices of 2-dimensional square lattices with ends closed at themselves are also derived. The index for closed ends case divided by the same index for open ends case in the limit N →&infin defines a novel quantity we call compression...
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These notes survey some basic results in toric varieties over a field F , with examples and applications. A computer algebra package (written by the author) is described which deals with both affine and projective toric varieties in any number of dimensions (written in both MAGMA [MAGMA] and GAP [GAP]). Among other things, the package implements the desingularization procedure, constructs some ...
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ژورنال
عنوان ژورنال: SEIBUTSU BUTSURI KAGAKU
سال: 1958
ISSN: 0031-9082,1349-9785
DOI: 10.2198/sbk.5.47