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{"title":"关于辛和Hermitian极空间的大偏卵形","authors":"Michela Ceria, Jan De Beule, Francesco Pavese, Valentino Smaldore","doi":"10.1002/jcd.21864","DOIUrl":null,"url":null,"abstract":"<p>In this paper we provide constructive lower bounds on the sizes of the largest partial ovoids of the symplectic polar spaces <math>\n <semantics>\n <mrow>\n <mi>W</mi>\n \n <mrow>\n <mo>(</mo>\n \n <mrow>\n <mn>3</mn>\n \n <mo>,</mo>\n \n <mi>q</mi>\n </mrow>\n \n <mo>)</mo>\n </mrow>\n </mrow>\n <annotation> ${\\mathscr{W}}(3,q)$</annotation>\n </semantics></math>, <math>\n <semantics>\n <mrow>\n <mi>q</mi>\n </mrow>\n <annotation> $q$</annotation>\n </semantics></math> odd square, <math>\n <semantics>\n <mrow>\n <mi>q</mi>\n \n <mo>≢</mo>\n \n <mn>0</mn>\n \n <mrow>\n <mo>(</mo>\n \n <mrow>\n <mi>mod</mi>\n \n <mn>3</mn>\n </mrow>\n \n <mo>)</mo>\n </mrow>\n </mrow>\n <annotation> $q\\not\\equiv 0(\\mathrm{mod}3)$</annotation>\n </semantics></math>, <math>\n <semantics>\n <mrow>\n <mi>W</mi>\n \n <mrow>\n <mo>(</mo>\n \n <mrow>\n <mn>5</mn>\n \n <mo>,</mo>\n \n <mi>q</mi>\n </mrow>\n \n <mo>)</mo>\n </mrow>\n </mrow>\n <annotation> ${\\mathscr{W}}(5,q)$</annotation>\n </semantics></math> and of the Hermitian polar spaces <math>\n <semantics>\n <mrow>\n <mi>ℋ</mi>\n \n <mrow>\n <mo>(</mo>\n \n <mrow>\n <mn>4</mn>\n \n <mo>,</mo>\n \n <msup>\n <mi>q</mi>\n \n <mn>2</mn>\n </msup>\n </mrow>\n \n <mo>)</mo>\n </mrow>\n </mrow>\n <annotation> ${\\rm{ {\\mathcal H} }}(4,{q}^{2})$</annotation>\n </semantics></math>, <math>\n <semantics>\n <mrow>\n <mi>q</mi>\n </mrow>\n <annotation> $q$</annotation>\n </semantics></math> even or <math>\n <semantics>\n <mrow>\n <mi>q</mi>\n </mrow>\n <annotation> $q$</annotation>\n </semantics></math> odd square, <math>\n <semantics>\n <mrow>\n <mi>q</mi>\n \n <mo>≢</mo>\n \n <mn>0</mn>\n \n <mrow>\n <mo>(</mo>\n \n <mrow>\n <mi>mod</mi>\n \n <mn>3</mn>\n </mrow>\n \n <mo>)</mo>\n </mrow>\n </mrow>\n <annotation> $q\\not\\equiv 0(\\mathrm{mod}3)$</annotation>\n </semantics></math>, <math>\n <semantics>\n <mrow>\n <mi>ℋ</mi>\n \n <mrow>\n <mo>(</mo>\n \n <mrow>\n <mn>6</mn>\n \n <mo>,</mo>\n \n <msup>\n <mi>q</mi>\n \n <mn>2</mn>\n </msup>\n </mrow>\n \n <mo>)</mo>\n </mrow>\n </mrow>\n <annotation> ${\\rm{ {\\mathcal H} }}(6,{q}^{2})$</annotation>\n </semantics></math>, <math>\n <semantics>\n <mrow>\n <mi>ℋ</mi>\n \n <mrow>\n <mo>(</mo>\n \n <mrow>\n <mn>8</mn>\n \n <mo>,</mo>\n \n <msup>\n <mi>q</mi>\n \n <mn>2</mn>\n </msup>\n </mrow>\n \n <mo>)</mo>\n </mrow>\n </mrow>\n <annotation> ${\\rm{ {\\mathcal H} }}(8,{q}^{2})$</annotation>\n </semantics></math>.</p>","PeriodicalId":15389,"journal":{"name":"Journal of Combinatorial Designs","volume":"31 1","pages":"5-22"},"PeriodicalIF":0.5000,"publicationDate":"2022-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"On large partial ovoids of symplectic and Hermitian polar spaces\",\"authors\":\"Michela Ceria, Jan De Beule, Francesco Pavese, Valentino Smaldore\",\"doi\":\"10.1002/jcd.21864\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>In this paper we provide constructive lower bounds on the sizes of the largest partial ovoids of the symplectic polar spaces <math>\\n <semantics>\\n <mrow>\\n <mi>W</mi>\\n \\n <mrow>\\n <mo>(</mo>\\n \\n <mrow>\\n <mn>3</mn>\\n \\n <mo>,</mo>\\n \\n <mi>q</mi>\\n </mrow>\\n \\n <mo>)</mo>\\n </mrow>\\n </mrow>\\n <annotation> ${\\\\mathscr{W}}(3,q)$</annotation>\\n </semantics></math>, <math>\\n <semantics>\\n <mrow>\\n <mi>q</mi>\\n </mrow>\\n <annotation> $q$</annotation>\\n </semantics></math> odd square, <math>\\n <semantics>\\n <mrow>\\n <mi>q</mi>\\n \\n <mo>≢</mo>\\n \\n <mn>0</mn>\\n \\n <mrow>\\n <mo>(</mo>\\n \\n <mrow>\\n <mi>mod</mi>\\n \\n <mn>3</mn>\\n </mrow>\\n \\n <mo>)</mo>\\n </mrow>\\n </mrow>\\n <annotation> $q\\\\not\\\\equiv 0(\\\\mathrm{mod}3)$</annotation>\\n </semantics></math>, <math>\\n <semantics>\\n <mrow>\\n <mi>W</mi>\\n \\n <mrow>\\n <mo>(</mo>\\n \\n <mrow>\\n <mn>5</mn>\\n \\n <mo>,</mo>\\n \\n <mi>q</mi>\\n </mrow>\\n \\n <mo>)</mo>\\n </mrow>\\n </mrow>\\n <annotation> ${\\\\mathscr{W}}(5,q)$</annotation>\\n </semantics></math> and of the Hermitian polar spaces <math>\\n <semantics>\\n <mrow>\\n <mi>ℋ</mi>\\n \\n <mrow>\\n <mo>(</mo>\\n \\n <mrow>\\n <mn>4</mn>\\n \\n <mo>,</mo>\\n \\n <msup>\\n <mi>q</mi>\\n \\n <mn>2</mn>\\n </msup>\\n </mrow>\\n \\n <mo>)</mo>\\n </mrow>\\n </mrow>\\n <annotation> ${\\\\rm{ {\\\\mathcal H} }}(4,{q}^{2})$</annotation>\\n </semantics></math>, <math>\\n <semantics>\\n <mrow>\\n <mi>q</mi>\\n </mrow>\\n <annotation> $q$</annotation>\\n </semantics></math> even or <math>\\n <semantics>\\n <mrow>\\n <mi>q</mi>\\n </mrow>\\n <annotation> $q$</annotation>\\n </semantics></math> odd square, <math>\\n <semantics>\\n <mrow>\\n <mi>q</mi>\\n \\n <mo>≢</mo>\\n \\n <mn>0</mn>\\n \\n <mrow>\\n <mo>(</mo>\\n \\n <mrow>\\n <mi>mod</mi>\\n \\n <mn>3</mn>\\n </mrow>\\n \\n <mo>)</mo>\\n </mrow>\\n </mrow>\\n <annotation> $q\\\\not\\\\equiv 0(\\\\mathrm{mod}3)$</annotation>\\n </semantics></math>, <math>\\n <semantics>\\n <mrow>\\n <mi>ℋ</mi>\\n \\n <mrow>\\n <mo>(</mo>\\n \\n <mrow>\\n <mn>6</mn>\\n \\n <mo>,</mo>\\n \\n <msup>\\n <mi>q</mi>\\n \\n <mn>2</mn>\\n </msup>\\n </mrow>\\n \\n <mo>)</mo>\\n </mrow>\\n </mrow>\\n <annotation> ${\\\\rm{ {\\\\mathcal H} }}(6,{q}^{2})$</annotation>\\n </semantics></math>, <math>\\n <semantics>\\n <mrow>\\n <mi>ℋ</mi>\\n \\n <mrow>\\n <mo>(</mo>\\n \\n <mrow>\\n <mn>8</mn>\\n \\n <mo>,</mo>\\n \\n <msup>\\n <mi>q</mi>\\n \\n <mn>2</mn>\\n </msup>\\n </mrow>\\n \\n <mo>)</mo>\\n </mrow>\\n </mrow>\\n <annotation> ${\\\\rm{ {\\\\mathcal H} }}(8,{q}^{2})$</annotation>\\n </semantics></math>.</p>\",\"PeriodicalId\":15389,\"journal\":{\"name\":\"Journal of Combinatorial Designs\",\"volume\":\"31 1\",\"pages\":\"5-22\"},\"PeriodicalIF\":0.5000,\"publicationDate\":\"2022-11-06\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Combinatorial Designs\",\"FirstCategoryId\":\"100\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/jcd.21864\",\"RegionNum\":4,\"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":"Journal of Combinatorial Designs","FirstCategoryId":"100","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/jcd.21864","RegionNum":4,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATHEMATICS","Score":null,"Total":0}
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