tetrapharmakon

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Name tetrapharmakon
Member for 2 years
Seen 2 days ago
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Location Padua, Italy
Age 25
14

Questions
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Is {Ø,{Ø},{Ø,{Ø}}, … } the only known universe?

jul 31 10 at 17:09 Andreas Blass 32.9k●4●54●109

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9
votes
3
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755
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Fundamental group of R^2 minus the (ir)rationals

nov 20 10 at 22:44 Jeremy Brazas 1,516●1●5●12

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5
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2k
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Flux through a Mobius strip

jan 9 11 at 3:04 KConrad 16.9k●3●61●117

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8
votes
2
answers
731
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Does $\pi_1$ have a right adjoint?

nov 8 10 at 22:30 Jeremy Brazas 1,516●1●5●12

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4
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answers
335
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Is the subobject functor really a presheaf?

sep 3 10 at 10:24 Peter Arndt 6,868●18●42

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1
3
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0
answers
149
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“orthogonal” and “parallel” morphisms?

mar 17 11 at 17:05 tetrapharmakon 869●2●11

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2
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A fibrant-objects structure on Top

apr 1 at 20:32 David White 4,858●1●20●27

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