报告人：唐修棣（北京理工大学）
时间：2024年5月21日 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.
