{"title":"辛地去除参数化射线","authors":"B. Stratmann","doi":"10.4310/jsg.2022.v20.n2.a4","DOIUrl":null,"url":null,"abstract":"Extracting isolated rays from a symplectic manifold result in a manifold symplectomorphic to the initial one. The same holds for higher dimensional parametrized rays under an additional condition. More precisely, let $(M,\\omega)$ be a symplectic manifold. Let $[0,\\infty)\\times Q\\subset\\mathbb{R}\\times Q$ be considered as parametrized rays $[0,\\infty)$ and let $\\varphi:[-1,\\infty)\\times Q\\to M$ be an injective, proper, continuous map immersive on $(-1,\\infty)\\times Q$. If for the standard vector field $\\frac{\\partial}{\\partial t}$ on $\\mathbb{R}$ and any further vector field $\\nu$ tangent to $(-1,\\infty)\\times Q$ the equation $\\varphi^*\\omega(\\frac{\\partial}{\\partial t},\\nu)=0$ holds then $M$ and $M\\setminus \\varphi([0,\\infty)\\times Q)$ are symplectomorphic.","PeriodicalId":50029,"journal":{"name":"Journal of Symplectic Geometry","volume":"105 6","pages":""},"PeriodicalIF":0.6000,"publicationDate":"2020-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":"{\"title\":\"Removing parametrized rays symplectically\",\"authors\":\"B. Stratmann\",\"doi\":\"10.4310/jsg.2022.v20.n2.a4\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Extracting isolated rays from a symplectic manifold result in a manifold symplectomorphic to the initial one. The same holds for higher dimensional parametrized rays under an additional condition. More precisely, let $(M,\\\\omega)$ be a symplectic manifold. Let $[0,\\\\infty)\\\\times Q\\\\subset\\\\mathbb{R}\\\\times Q$ be considered as parametrized rays $[0,\\\\infty)$ and let $\\\\varphi:[-1,\\\\infty)\\\\times Q\\\\to M$ be an injective, proper, continuous map immersive on $(-1,\\\\infty)\\\\times Q$. If for the standard vector field $\\\\frac{\\\\partial}{\\\\partial t}$ on $\\\\mathbb{R}$ and any further vector field $\\\\nu$ tangent to $(-1,\\\\infty)\\\\times Q$ the equation $\\\\varphi^*\\\\omega(\\\\frac{\\\\partial}{\\\\partial t},\\\\nu)=0$ holds then $M$ and $M\\\\setminus \\\\varphi([0,\\\\infty)\\\\times Q)$ are symplectomorphic.\",\"PeriodicalId\":50029,\"journal\":{\"name\":\"Journal of Symplectic Geometry\",\"volume\":\"105 6\",\"pages\":\"\"},\"PeriodicalIF\":0.6000,\"publicationDate\":\"2020-09-11\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Symplectic Geometry\",\"FirstCategoryId\":\"100\",\"ListUrlMain\":\"https://doi.org/10.4310/jsg.2022.v20.n2.a4\",\"RegionNum\":3,\"RegionCategory\":\"数学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MATHEMATICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Symplectic Geometry","FirstCategoryId":"100","ListUrlMain":"https://doi.org/10.4310/jsg.2022.v20.n2.a4","RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATHEMATICS","Score":null,"Total":0}
Extracting isolated rays from a symplectic manifold result in a manifold symplectomorphic to the initial one. The same holds for higher dimensional parametrized rays under an additional condition. More precisely, let $(M,\omega)$ be a symplectic manifold. Let $[0,\infty)\times Q\subset\mathbb{R}\times Q$ be considered as parametrized rays $[0,\infty)$ and let $\varphi:[-1,\infty)\times Q\to M$ be an injective, proper, continuous map immersive on $(-1,\infty)\times Q$. If for the standard vector field $\frac{\partial}{\partial t}$ on $\mathbb{R}$ and any further vector field $\nu$ tangent to $(-1,\infty)\times Q$ the equation $\varphi^*\omega(\frac{\partial}{\partial t},\nu)=0$ holds then $M$ and $M\setminus \varphi([0,\infty)\times Q)$ are symplectomorphic.
期刊介绍:
Publishes high quality papers on all aspects of symplectic geometry, with its deep roots in mathematics, going back to Huygens’ study of optics and to the Hamilton Jacobi formulation of mechanics. Nearly all branches of mathematics are treated, including many parts of dynamical systems, representation theory, combinatorics, packing problems, algebraic geometry, and differential topology.