An inequality on diagonal $F$-thresholds over standard-graded complete intersection rings

Authors: JINJIA LI

Abstract: In a recent paper, De Stefani and N\'{u}\~{n}ez-Betancourt proved that for a standard-graded $F$-pure $k$-algebra $R$, its diagonal $F$-threshold $c(R)$ is always at least $-a(R)$, where $a(R)$ is the $a$-invariant. In this paper, we establish a refinement of this result in the setting of complete intersection rings.

Keywords: Frobenius power, socle, $F$-threshold, $F$-pure threshold, $a$-invariant

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