Kohji Yanagawa

activity

20242026

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math.AC2026

Lyubeznik numbers of the face rings of simplicial posets

Kosuke Shibata, Kohji Yanagawa

For a simplicial poset $P$ , Stanley assigned the face ring $A_{P}$ , which is the quotient of the polynomial ring $S := K [t_{x} ∣ x \in P ∖ {0}]$ by the ideal $I_P…

math.AC2026

Toward the theory on local cohomologies at the ideals given by simplicial posets

Kosuke Shibata, Kohji Yanagawa

For a simplicial poset $P$ , Stanley assigned the face ring $A_{P}$ , which is the quotient of the polynomial ring $S := K [t_{x} ∣ x \in P ∖ {0}]$ by the ideal $I_P…