The log Tate conjecture for a log Tate curve

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, let m2rm\geq 2r, and let EE be a log Tate curve over ss. Write Hm(X)=Hlogeˊtm(Xs(log),Q)H^m(X)_{\ell}=H^m_{\operatorname{\log\acute{e}t}}(X_{\overline{s}(\log)},\mathbb{Q}_{\ell}). The log Tate curve conjecture. The map

QgrmrK0,lim(X×Em2r)Hm(X)(r)G\mathbb{Q}_{\ell}\otimes\operatorname{gr}^{m-r}K_{0,\lim}(X\times E^{m-2r})\longrightarrow H^m(X)_{\ell}(r)^G

is surjective. The finite-field hypothesis makes the rational K-theory and log étale cohomology independent of the choices defining the log Tate curve; the source gives no resolution.

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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