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Questions
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Biographic Data/Stories about André Néron

apr 6 10 at 23:30 François G. Dorais♦ 22.4k●2●48●113

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Is there a connected $k$-group scheme $G$ such that $G_{red}$ is not a subgroup?

jul 26 at 9:17 Olivier Benoist 2,708●10●18

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Sequences of Squares with all square differences

aug 23 11 at 13:13 joro 4,230●1●10●31