Dense globally F-split type conjecture for varieties with int-amplified endomorphisms

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Let XX be a normal projective variety over an algebraically closed field kk of characteristic zero. An endomorphism f ⁣:XXf\colon X\to X is int-amplified if there exists an ample Cartier divisor HH on XX such that fHHf^*H-H is ample. The variety XX is of dense globally FF-split type if its reduction modulo pp is globally FF-split for infinitely many primes pp. Dense globally FF-split type conjecture. If XX admits an int-amplified endomorphism, then XX is of dense globally FF-split type. An affirmative answer to Schwede and Smith's question whether varieties of dense globally FF-split type are of Calabi–Yau type would imply the preceding Calabi–Yau type conjecture; this statement is open in the general setting.

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Sources & referencesView supporting material

Primary source

Shou Yoshikawa, “Global F-splitting of surfaces admitting an int-amplified endomorphim”, arXiv:1911.01181 (2019).

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