{"title":"有界有限秩的弱紧半拓扑对称逆半群的注释","authors":"O. Gutik","doi":"10.30970/vmm.2021.91.040-053","DOIUrl":null,"url":null,"abstract":"We study feebly compact shift-continuous $T_1$-topologies on the symmetric inverse semigroup $\\mathscr{I}_\\lambda^n$ of finite transformations of the rank $\\leqslant n$. It is proved that such $T_1$-topology is sequentially pracompact if and only if it is feebly compact. Also, we show that every shift-continuous feebly $\\omega$-bounded $T_1$-topology on $\\mathscr{I}_\\lambda^n$ is compact.","PeriodicalId":277870,"journal":{"name":"Visnyk Lvivskogo Universytetu Seriya Mekhaniko-Matematychna","volume":"43 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2022-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A note on feebly compact semitopological symmetric inverse semigroups of a bounded finite rank\",\"authors\":\"O. Gutik\",\"doi\":\"10.30970/vmm.2021.91.040-053\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We study feebly compact shift-continuous $T_1$-topologies on the symmetric inverse semigroup $\\\\mathscr{I}_\\\\lambda^n$ of finite transformations of the rank $\\\\leqslant n$. It is proved that such $T_1$-topology is sequentially pracompact if and only if it is feebly compact. Also, we show that every shift-continuous feebly $\\\\omega$-bounded $T_1$-topology on $\\\\mathscr{I}_\\\\lambda^n$ is compact.\",\"PeriodicalId\":277870,\"journal\":{\"name\":\"Visnyk Lvivskogo Universytetu Seriya Mekhaniko-Matematychna\",\"volume\":\"43 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2022-02-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Visnyk Lvivskogo Universytetu Seriya Mekhaniko-Matematychna\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.30970/vmm.2021.91.040-053\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Visnyk Lvivskogo Universytetu Seriya Mekhaniko-Matematychna","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.30970/vmm.2021.91.040-053","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
A note on feebly compact semitopological symmetric inverse semigroups of a bounded finite rank
We study feebly compact shift-continuous $T_1$-topologies on the symmetric inverse semigroup $\mathscr{I}_\lambda^n$ of finite transformations of the rank $\leqslant n$. It is proved that such $T_1$-topology is sequentially pracompact if and only if it is feebly compact. Also, we show that every shift-continuous feebly $\omega$-bounded $T_1$-topology on $\mathscr{I}_\lambda^n$ is compact.