{"title":"论可元空间上 $C_p$ 空间之间的均匀连续投射","authors":"A. Eysen, A. Leiderman, V. Valov","doi":"arxiv-2408.01870","DOIUrl":null,"url":null,"abstract":"Let $X$ and $Y$ be metrizable spaces and suppose that there exists a\nuniformly continuous surjection $T: C_{p}(X) \\to C_{p}(Y)$ (resp., $T:\nC_{p}^*(X) \\to C_{p}^*(Y)$), where $C_{p}(X)$ (resp., $C_{p}^*(X)$) denotes the\nspace of all real-valued continuous (resp., continuous and bounded) functions\non $X$ endowed with the pointwise convergence topology. We show that if additionally $T$ is an inversely bounded mapping and $X$ has\nsome dimensional-like property $\\mathcal P$, then so does $Y$. For example,\nthis is true if $\\mathcal P$ is one of the following properties:\nzero-dimensionality, countable-dimensionality or strong\ncountable-dimensionality. Also, we consider other properties $\\mathcal P$: of being a scattered, or a\nstrongly $\\sigma$-scattered space, or being a $\\Delta_1$-space (see [17]). Our\nresults strengthen and extend several results from [6], [13], [17].","PeriodicalId":501314,"journal":{"name":"arXiv - MATH - General Topology","volume":"65 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-08-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"On uniformly continuous surjections between $C_p$-spaces over metrizable spaces\",\"authors\":\"A. Eysen, A. Leiderman, V. Valov\",\"doi\":\"arxiv-2408.01870\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Let $X$ and $Y$ be metrizable spaces and suppose that there exists a\\nuniformly continuous surjection $T: C_{p}(X) \\\\to C_{p}(Y)$ (resp., $T:\\nC_{p}^*(X) \\\\to C_{p}^*(Y)$), where $C_{p}(X)$ (resp., $C_{p}^*(X)$) denotes the\\nspace of all real-valued continuous (resp., continuous and bounded) functions\\non $X$ endowed with the pointwise convergence topology. We show that if additionally $T$ is an inversely bounded mapping and $X$ has\\nsome dimensional-like property $\\\\mathcal P$, then so does $Y$. For example,\\nthis is true if $\\\\mathcal P$ is one of the following properties:\\nzero-dimensionality, countable-dimensionality or strong\\ncountable-dimensionality. Also, we consider other properties $\\\\mathcal P$: of being a scattered, or a\\nstrongly $\\\\sigma$-scattered space, or being a $\\\\Delta_1$-space (see [17]). Our\\nresults strengthen and extend several results from [6], [13], [17].\",\"PeriodicalId\":501314,\"journal\":{\"name\":\"arXiv - MATH - General Topology\",\"volume\":\"65 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-08-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"arXiv - MATH - General Topology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/arxiv-2408.01870\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - MATH - General Topology","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2408.01870","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
On uniformly continuous surjections between $C_p$-spaces over metrizable spaces
Let $X$ and $Y$ be metrizable spaces and suppose that there exists a
uniformly continuous surjection $T: C_{p}(X) \to C_{p}(Y)$ (resp., $T:
C_{p}^*(X) \to C_{p}^*(Y)$), where $C_{p}(X)$ (resp., $C_{p}^*(X)$) denotes the
space of all real-valued continuous (resp., continuous and bounded) functions
on $X$ endowed with the pointwise convergence topology. We show that if additionally $T$ is an inversely bounded mapping and $X$ has
some dimensional-like property $\mathcal P$, then so does $Y$. For example,
this is true if $\mathcal P$ is one of the following properties:
zero-dimensionality, countable-dimensionality or strong
countable-dimensionality. Also, we consider other properties $\mathcal P$: of being a scattered, or a
strongly $\sigma$-scattered space, or being a $\Delta_1$-space (see [17]). Our
results strengthen and extend several results from [6], [13], [17].