报告题目： Affine structures of semitoric integrable systems 

报告人：唐修棣(北京理工大学)

时间：2024年5月21日，上午10：00～11：00

地点：物质科研楼C1124

It is well known that the moment map of a compact toric integrable system is a Delzant polytope which determines the system. The orbit of the polytope under the integral affine group that is of one-to-one correspondence with the system under fiberwise symplectomorphisms. There is a folklore question whether the singular affine structure on the image of momentum maps still determines a semitoric integrable system. We answer this question negatively and give counterexamples; see arXiv:2401.10881

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