Javier Aramayona, Rodrigo De Pool, Rachel Skipper, Jing Tao, Nicholas G. Vlamis, Xiaolei Wu
{"title":"非平面末端持续令人难忘","authors":"Javier Aramayona, Rodrigo De Pool, Rachel Skipper, Jing Tao, Nicholas G. Vlamis, Xiaolei Wu","doi":"arxiv-2409.05502","DOIUrl":null,"url":null,"abstract":"We show that continuous epimorphisms between a class of subgroups of mapping\nclass groups of orientable infinite-genus 2-manifolds with no planar ends are\nalways induced by homeomorphisms. This class of subgroups includes the pure\nmapping class group, the closure of the compactly supported mapping classes,\nand the full mapping class group in the case that the underlying manifold has a\nfinite number of ends or is perfectly self-similar. As a corollary, these\ngroups are Hopfian topological groups.","PeriodicalId":501037,"journal":{"name":"arXiv - MATH - Group Theory","volume":"2 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Non-planar ends are continuously unforgettable\",\"authors\":\"Javier Aramayona, Rodrigo De Pool, Rachel Skipper, Jing Tao, Nicholas G. Vlamis, Xiaolei Wu\",\"doi\":\"arxiv-2409.05502\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"We show that continuous epimorphisms between a class of subgroups of mapping\\nclass groups of orientable infinite-genus 2-manifolds with no planar ends are\\nalways induced by homeomorphisms. This class of subgroups includes the pure\\nmapping class group, the closure of the compactly supported mapping classes,\\nand the full mapping class group in the case that the underlying manifold has a\\nfinite number of ends or is perfectly self-similar. As a corollary, these\\ngroups are Hopfian topological groups.\",\"PeriodicalId\":501037,\"journal\":{\"name\":\"arXiv - MATH - Group Theory\",\"volume\":\"2 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-09-09\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"arXiv - MATH - Group Theory\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/arxiv-2409.05502\",\"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 - MATH - Group Theory","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2409.05502","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
We show that continuous epimorphisms between a class of subgroups of mapping
class groups of orientable infinite-genus 2-manifolds with no planar ends are
always induced by homeomorphisms. This class of subgroups includes the pure
mapping class group, the closure of the compactly supported mapping classes,
and the full mapping class group in the case that the underlying manifold has a
finite number of ends or is perfectly self-similar. As a corollary, these
groups are Hopfian topological groups.