Classical Mirror Symmetry by Masao Jinzenji

Author:Masao Jinzenji
Language: eng
Format: epub, pdf
Publisher: Springer Singapore, Singapore

(3.12)

This second term is the pull-back of the Khler form of M by the map . Since is a representative of , becomes a topological invariant. Especially if , it becomes

(3.13)

by suitably adjusting the scale of . This d is called the winding number, or degree of the map , and it is a homotopy invariant (the homotopy invariant is a quantity invariant under continuous deformation of the map).

Now, we discuss general characteristics of the A-model derived from the fact that it is invariant under BRST-transformation. First, we represent the correlation function of observable W constructed from fields in the following way:

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