{"title":"选择的本地反思","authors":"C. Ryan-Smith","doi":"10.1007/s10474-025-01533-3","DOIUrl":null,"url":null,"abstract":"<div><p>Under the assumption of small violations of choice with seed \n<span>\\(S\\)</span> <span>\\((SVC(S))\\)</span>, the failure of many choice principles reflect to local properties of <span>\\(S\\)</span>, which can be a helpful characterisation for preservation proofs. We demonstrate the reflections of <span>\\(DC\\)</span>, <span>\\(AC_\\lambda\\)</span>, <span>\\(PP\\)</span>, and other important forms of choice. As a consequence, we show that if <span>\\(S\\)</span> is infinite then <span>\\(S\\)</span> can be partitioned into <span>\\(\\omega\\)</span> many non-empty subsets.</p></div>","PeriodicalId":50894,"journal":{"name":"Acta Mathematica Hungarica","volume":"176 1","pages":"244 - 257"},"PeriodicalIF":0.6000,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10474-025-01533-3.pdf","citationCount":"0","resultStr":"{\"title\":\"Local reflections of choice\",\"authors\":\"C. Ryan-Smith\",\"doi\":\"10.1007/s10474-025-01533-3\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Under the assumption of small violations of choice with seed \\n<span>\\\\(S\\\\)</span> <span>\\\\((SVC(S))\\\\)</span>, the failure of many choice principles reflect to local properties of <span>\\\\(S\\\\)</span>, which can be a helpful characterisation for preservation proofs. We demonstrate the reflections of <span>\\\\(DC\\\\)</span>, <span>\\\\(AC_\\\\lambda\\\\)</span>, <span>\\\\(PP\\\\)</span>, and other important forms of choice. As a consequence, we show that if <span>\\\\(S\\\\)</span> is infinite then <span>\\\\(S\\\\)</span> can be partitioned into <span>\\\\(\\\\omega\\\\)</span> many non-empty subsets.</p></div>\",\"PeriodicalId\":50894,\"journal\":{\"name\":\"Acta Mathematica Hungarica\",\"volume\":\"176 1\",\"pages\":\"244 - 257\"},\"PeriodicalIF\":0.6000,\"publicationDate\":\"2025-06-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1007/s10474-025-01533-3.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Acta Mathematica Hungarica\",\"FirstCategoryId\":\"100\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10474-025-01533-3\",\"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":"Acta Mathematica Hungarica","FirstCategoryId":"100","ListUrlMain":"https://link.springer.com/article/10.1007/s10474-025-01533-3","RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATHEMATICS","Score":null,"Total":0}
Under the assumption of small violations of choice with seed
\(S\)\((SVC(S))\), the failure of many choice principles reflect to local properties of \(S\), which can be a helpful characterisation for preservation proofs. We demonstrate the reflections of \(DC\), \(AC_\lambda\), \(PP\), and other important forms of choice. As a consequence, we show that if \(S\) is infinite then \(S\) can be partitioned into \(\omega\) many non-empty subsets.
期刊介绍:
Acta Mathematica Hungarica is devoted to publishing research articles of top quality in all areas of pure and applied mathematics as well as in theoretical computer science. The journal is published yearly in three volumes (two issues per volume, in total 6 issues) in both print and electronic formats. Acta Mathematica Hungarica (formerly Acta Mathematica Academiae Scientiarum Hungaricae) was founded in 1950 by the Hungarian Academy of Sciences.