{"title":"对“Lindelöf关于理想”的修正[新西兰数学学报,42,115-120,2012]","authors":"Jiarul Hoque, S. Modak","doi":"10.53733/218","DOIUrl":null,"url":null,"abstract":"We give a counterexample in this amendment to show that there is an error in consideration of the statement \"{\\it if $f : X \\to Y$ and ${\\bf J}$ is an ideal on $Y$, then $f^{-1}({\\bf J}) = \\{f^{-1}(J) : J \\in {\\bf J}\\}$ is an ideal on $X$}\" by Hamlett in his paper \"Lindelöf with respect to an ideal\" [New Zealand J. Math. 42, 115-120, 2012]. We also modify it here in a new way and henceforth put forward correctly all the results that were based on the said statement derived therein.","PeriodicalId":30137,"journal":{"name":"New Zealand Journal of Mathematics","volume":"134 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2023-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Amendment to \\\"Lindelöf with respect to an ideal\\\" [New Zealand J. Math. 42, 115-120, 2012]\",\"authors\":\"Jiarul Hoque, S. Modak\",\"doi\":\"10.53733/218\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We give a counterexample in this amendment to show that there is an error in consideration of the statement \\\"{\\\\it if $f : X \\\\to Y$ and ${\\\\bf J}$ is an ideal on $Y$, then $f^{-1}({\\\\bf J}) = \\\\{f^{-1}(J) : J \\\\in {\\\\bf J}\\\\}$ is an ideal on $X$}\\\" by Hamlett in his paper \\\"Lindelöf with respect to an ideal\\\" [New Zealand J. Math. 42, 115-120, 2012]. We also modify it here in a new way and henceforth put forward correctly all the results that were based on the said statement derived therein.\",\"PeriodicalId\":30137,\"journal\":{\"name\":\"New Zealand Journal of Mathematics\",\"volume\":\"134 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2023-06-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"New Zealand Journal of Mathematics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.53733/218\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"Mathematics\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"New Zealand Journal of Mathematics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.53733/218","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"Mathematics","Score":null,"Total":0}
引用次数: 0
摘要
在此修正中,我们给出了一个反例,说明在考虑Hamlett在他的论文“Lindelöf关于理想”中的命题“{\it if $f: X \to Y$ and ${\bf J}$是$Y$上的理想,那么$f^{-1}({\bf J}) = \{f^{-1}(J): J \in {\bf J}\}$是$X$}上的理想”时存在错误[新西兰数学学报,42,115-120,2012]。我们在这里也对它作了新的修改,从此正确地提出了基于其中所导出的上述陈述的所有结果。
Amendment to "Lindelöf with respect to an ideal" [New Zealand J. Math. 42, 115-120, 2012]
We give a counterexample in this amendment to show that there is an error in consideration of the statement "{\it if $f : X \to Y$ and ${\bf J}$ is an ideal on $Y$, then $f^{-1}({\bf J}) = \{f^{-1}(J) : J \in {\bf J}\}$ is an ideal on $X$}" by Hamlett in his paper "Lindelöf with respect to an ideal" [New Zealand J. Math. 42, 115-120, 2012]. We also modify it here in a new way and henceforth put forward correctly all the results that were based on the said statement derived therein.