# abstract

Homological Mirror Symmetry (minicourse) | |

Topic: | Logarithmic Gromov-Witten invariants |

Speaker: | Helge Ruddat |

Affiliation: | Johannes Gutenberg-Universität Mainz; Member, School of Mathematics |

Date: | Wednesday, October 26 |

Time/Room: | 10:45am - 12:00pm/S-101 |

Logarithmic Gromov-Witten invariants generalize usual and relative Gromov-Witten invariants and were first suggested by Siebert and then recently introduced by Gross-Siebert and Abramovich-Chen. Applications include more general degeneration formulas and the intrinsic construction of mirror duals to a log Calabi-Yau pair $(X,D)$. The key results so far are log stable reduction and the existence of a natural virtual fundamental class as well as by means of the notion of "basicness" the algebraicity and quasi-compactness of the associated moduli spaces. I will explain the key features of these interesting invariants that closely relate to tropical curves.