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Action of PGL(2) on Projective Space

jun 5 11 at 4:57 Lavender Honey 6,024●30●69

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Cochains on Eilenberg-MacLane Spaces

may 8 at 16:22 MathOverflow♦ 1●2●3

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Torsors for finite group schemes

nov 20 10 at 15:18 Torsten Ekedahl 17.9k●1●42●68