Knots in Collapsible and Non-Collapsible Balls

Electronic Journal Of Combinatorics

Bruno Benedetti¹ 

关键词: knots in triangulations;    shellability;    local constructibility;    non-evasiveness;    collapsibility;    discrete Morse theory;   

DOI  :  

学科分类：离散数学和组合数学

来源: Electronic Journal Of Combinatorics

【 摘 要 】

We construct the first explicit example of a simplicial 3-ball $B_{15,66}$ that is not collapsible. It has only 15 vertices. We exhibit a second 3-ball $B_{12,38}$ with 12 vertices that is collapsible and not shellable, but evasive. Finally, we present th

【 授权许可】

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