{"title":"I-surfaces from surfaces with one exceptional unimodal point","authors":"Sönke Rollenske, Diana Torres","doi":"10.1002/mana.202300218","DOIUrl":null,"url":null,"abstract":"<p>We complement recent work of Gallardo, Pearlstein, Schaffler, and Zhang, showing that the stable surfaces with <span></span><math>\n <semantics>\n <mrow>\n <msubsup>\n <mi>K</mi>\n <mi>X</mi>\n <mn>2</mn>\n </msubsup>\n <mo>=</mo>\n <mn>1</mn>\n </mrow>\n <annotation>$K_X^2 =1$</annotation>\n </semantics></math> and <span></span><math>\n <semantics>\n <mrow>\n <mi>χ</mi>\n <mo>(</mo>\n <msub>\n <mi>O</mi>\n <mi>X</mi>\n </msub>\n <mo>)</mo>\n <mo>=</mo>\n <mn>3</mn>\n </mrow>\n <annotation>$\\chi (\\mathcal {O}_X) = 3$</annotation>\n </semantics></math> they construct are indeed the only ones arising from imposing an exceptional unimodal double point.</p><p>In addition, we explicitly describe the birational type of the surfaces constructed from singularities of type <span></span><math>\n <semantics>\n <msub>\n <mi>E</mi>\n <mn>12</mn>\n </msub>\n <annotation>$E_{12}$</annotation>\n </semantics></math>, <span></span><math>\n <semantics>\n <msub>\n <mi>E</mi>\n <mn>13</mn>\n </msub>\n <annotation>$E_{13}$</annotation>\n </semantics></math>, <span></span><math>\n <semantics>\n <msub>\n <mi>E</mi>\n <mn>14</mn>\n </msub>\n <annotation>$E_{14}$</annotation>\n </semantics></math>.</p>","PeriodicalId":49853,"journal":{"name":"Mathematische Nachrichten","volume":"297 6","pages":"2175-2197"},"PeriodicalIF":0.8000,"publicationDate":"2024-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/mana.202300218","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Mathematische Nachrichten","FirstCategoryId":"100","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/mana.202300218","RegionNum":3,"RegionCategory":"数学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATHEMATICS","Score":null,"Total":0}
引用次数: 0
Abstract
We complement recent work of Gallardo, Pearlstein, Schaffler, and Zhang, showing that the stable surfaces with and they construct are indeed the only ones arising from imposing an exceptional unimodal double point.
In addition, we explicitly describe the birational type of the surfaces constructed from singularities of type , , .
期刊介绍:
Mathematische Nachrichten - Mathematical News publishes original papers on new results and methods that hold prospect for substantial progress in mathematics and its applications. All branches of analysis, algebra, number theory, geometry and topology, flow mechanics and theoretical aspects of stochastics are given special emphasis. Mathematische Nachrichten is indexed/abstracted in Current Contents/Physical, Chemical and Earth Sciences; Mathematical Review; Zentralblatt für Mathematik; Math Database on STN International, INSPEC; Science Citation Index