Improves the theorem “A finite poset is dismantlable if and only if it is dismantlable by irreducibles”, obtains a new theorem “A finite poset is homotopic dismantlable if and only if it is dismantlable by star irreducibles” and proves the equivalence of these theorems.
就Fixed Point in Poset中的定理“有限偏序集P是可拆的充要条件为P是不可约可拆”进行了改进,得到了P是同伦可拆的充要条件为P是星形不可约可拆,并且证明了这两个充要条件等价,极大地简化了不可约可拆的判别
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