Nontriviality of the Nori fundamental group of fake projective planes in positive characteristic
Nontriviality of the Nori fundamental group of fake projective planes in positive characteristic
Let be a fake projective plane over an algebraically closed field of characteristic , meaning a smooth projective surface with the same Betti numbers as the projective plane and satisfying , , and . Let denote its Nori fundamental group scheme. Nontriviality conjecture. One should have
In characteristic zero, the corresponding nontriviality follows from the preceding argument, whereas the positive-characteristic assertion is presented as a conjectural extension and is not resolved here.
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Sources & referencesView supporting material
Primary source
Kirti Joshi, “On surfaces satisfying q=0,p_g=0,c_1^2=9”, arXiv:2508.12339 (2025).
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