The logarithmic K-theoretic Tate conjecture

Let ss be the standard log point over a finite field kk, let XX be a projective vertical log smooth fs log scheme over ss, and define K0log(X)K_0^{\log}(X) as the quotient of K0,lim(X)K_{0,\lim}(X) by the ideal generated by la1l_a-1 for all logarithmic line-bundle classes lal_a. The logarithmic K-theoretic Tate conjecture.

QgrrK0log(X)H2r(X)(r)G\mathbb{Q}_{\ell}\otimes\operatorname{gr}^rK_0^{\log}(X)\overset{\cong}{\longrightarrow}H^{2r}(X)_{\ell}(r)^G

is an isomorphism. This removes the excess classes arising from logarithmic modifications and is a finer version of the degree-2r2r log Tate conjecture; no resolution is stated.

Sources & referencesView supporting material

Primary source

Kazuya Kato, Chikara Nakayama and Sampei Usui, “Logarithmic Tate conjectures over finite fields”, arXiv:2502.16974 (2025).

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