Mirror Symmetry



Mirror Symmetry

Slogan: the symplectic geometry of a Calabi-Yau should have “the same” enmerative invariants as those in the complex-analytic geometry of its mirror. The homological mirror symmetry conjecture predicts a correspondence between the derived category of coherent sheaves of a variety and the symplectic data (packaged in the Fukaya category) of its mirror object.

attachments/Pasted%20image%2020220514194013.png

Lagrangian submanifolds

For \(X\) a Calabi-Yau - A-side: the Fukaya category of \(X\) corresponds to \(A{\hbox{-}}\)branes on \(X\), so roughly Lagrangian submanifolds equipped with a flat bundle. - B-side: DCoh of \(X\) corresponds to \(B{\hbox{-}}\)branes on \(X\).

attachments/Pasted%20image%2020220323185429.png

Other field theories replace \(X\) with a Fano.

For Fanos

attachments/Pasted%20image%2020220514194046.png attachments/Pasted%20image%2020220514194102.png

Importance of toric structure: attachments/Pasted%20image%2020220514194136.png

Examples

Showing an congruence of Weil zeta functions for a K3 attachments/Pasted%20image%2020220516171456.png

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