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Relative Koszul coresolutions and relative Betti numbers

ѧߣHideto Asashiba

ߵλԴѧ/ѧ ߵоԺ

ʱ䣺2024118  14:30-16:30

ص㣺¥209

ժҪLet G be a finitely generated right A-module for a finite-dimensional algebra A over a fieled k, and I the additive closure of G. We will define an I-relative Koszul coresolution K^.(V ) of an indecomposable direct summand V of G, and show that for a finitely generated A-module M, the I-relative i-th Betti number for M at V is given as the k-dimension of the i-th homology of the I-relative Koszul complex K_V(M)_. := Hom_A(K^.(V), M) of M at V for all i 0. This is applied to investigate the minimal interval resolution/coresolution of a persistence module M, e.g., to check the interval decomposability of M, and to compute the interval approximation of M

ѧ߼Hideto AsashibaձԴѧݽڣѧѧоѧоԱ2024ձѧѧĻߡڵȼ۵Ĺ췽оȡһϵӰĽйGrothendieckĵȼ۵ĽAdv. Math. 235(2013), 134-160ڵȼۡȶȼGabriel طоǰصλǹ΢ִַη2ĵճϺGrothendieckĺѾɣһǽһоⷽ⡣ϣHideto AsashibaڣϣHideto Asashibaڵȼ븲۵ijɹľ飬õȼڸоȺۡ

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