{"title":"对经典凸性理论的新认识","authors":"V. Milman, Liran Rotem","doi":"10.15407/mag16.03.291","DOIUrl":null,"url":null,"abstract":"Let $B_{x}\\subseteq\\mathbb{R}^{n}$ denote the Euclidean ball with diameter $[0,x]$, i.e. with with center at $\\frac{x}{2}$ and radius $\\frac{\\left|x\\right|}{2}$. We call such a ball a petal. A flower $F$ is any union of petals, i.e. $F=\\bigcup_{x\\in A}B_{x}$ for any set $A\\subseteq\\mathbb{R}^{n}$. We showed in previous work that the family of all flowers $\\mathcal{F}$ is in 1-1 correspondence with $\\mathcal{K}_{0}$ - the family of all convex bodies containing $0$. Actually, there are two essentially different such correspondences. We demonstrate a number of different non-linear constructions on $\\mathcal{F}$ and $\\mathcal{K}_{0}$. Towards this goal we further develop the theory of flowers.","PeriodicalId":8426,"journal":{"name":"arXiv: Functional Analysis","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2020-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":"{\"title\":\"Novel View on Classical Convexity Theory\",\"authors\":\"V. Milman, Liran Rotem\",\"doi\":\"10.15407/mag16.03.291\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Let $B_{x}\\\\subseteq\\\\mathbb{R}^{n}$ denote the Euclidean ball with diameter $[0,x]$, i.e. with with center at $\\\\frac{x}{2}$ and radius $\\\\frac{\\\\left|x\\\\right|}{2}$. We call such a ball a petal. A flower $F$ is any union of petals, i.e. $F=\\\\bigcup_{x\\\\in A}B_{x}$ for any set $A\\\\subseteq\\\\mathbb{R}^{n}$. We showed in previous work that the family of all flowers $\\\\mathcal{F}$ is in 1-1 correspondence with $\\\\mathcal{K}_{0}$ - the family of all convex bodies containing $0$. Actually, there are two essentially different such correspondences. We demonstrate a number of different non-linear constructions on $\\\\mathcal{F}$ and $\\\\mathcal{K}_{0}$. Towards this goal we further develop the theory of flowers.\",\"PeriodicalId\":8426,\"journal\":{\"name\":\"arXiv: Functional Analysis\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2020-05-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"arXiv: Functional Analysis\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.15407/mag16.03.291\",\"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: Functional Analysis","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.15407/mag16.03.291","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Let $B_{x}\subseteq\mathbb{R}^{n}$ denote the Euclidean ball with diameter $[0,x]$, i.e. with with center at $\frac{x}{2}$ and radius $\frac{\left|x\right|}{2}$. We call such a ball a petal. A flower $F$ is any union of petals, i.e. $F=\bigcup_{x\in A}B_{x}$ for any set $A\subseteq\mathbb{R}^{n}$. We showed in previous work that the family of all flowers $\mathcal{F}$ is in 1-1 correspondence with $\mathcal{K}_{0}$ - the family of all convex bodies containing $0$. Actually, there are two essentially different such correspondences. We demonstrate a number of different non-linear constructions on $\mathcal{F}$ and $\mathcal{K}_{0}$. Towards this goal we further develop the theory of flowers.