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Date | 2023-12-06 |
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Speaker | 윤기헌 |

Dept. | 성신여자대학교 |

Room | 27-325 |

Time | 16:00-17:30 |

A construction of symplectic 4-manifold with positive signature is one of the main interest in the geography problem of symplectic 4-manifolds.

A surface bubdle over surface with section is related to a relaltion in surface mapping class group as a product of commutators and boundary parallel Dehn twists and a computation of signature is coming from a local signature formula.

In the tallk we will explain how to construct a surface bundle over surface with positive signature for almost all pair of $(g, h)$ except 18 cases. Most details are based on the article written by Baykur and Korkmaz.

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