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تسجيل مستخدم جديدCellular resolutions from mapping cones
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One can iteratively obtain a free resolution of any monomial ideal $I$ by considering the mapping cone of the map of complexes associated to adding one generator at a time. Herzog and Takayama have shown that this procedure yields a minimal resolution if $I$ has linear quotients, in which case the mapping cone in each step cones a Koszul complex onto the previously constructed resolution. Here we consider cellular realizations of these resolutions. Extending a construction of Mermin we describe a regular CW-complex that supports the resolutions of Herzog and Takayama in the case that $I$ has a `regular decomposition function. By varying the choice of chain map we recover other known cellular resolutions, including the `box of complexes resolutions of Corso, Nagel, and Reiner and the related `homomorphism complex resolutions of Dochtermann and Engstrom. Other choices yield combinatorially distinct complexes with interesting structure, and suggests a notion of a `space of cellular resolutions.
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