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# Questions

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### Famous mathematical quotes [closed]

feb 1 11 at 5:06 J. H. S. 2,4151231

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### “Philosophical” meaning of the Yoneda Lemma

feb 25 at 13:07 Tom Leinster 13.5k14082

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### Explanation for the Chern character

mar 17 10 at 6:20 Peter Teichner 1,226148

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### Explanation for the Thom-Pontryagin construction (and its generalisations)

jul 21 10 at 18:12 Daniel Moskovich 10.9k136105

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### Definition and meaning of the conductor of an elliptic curve

jul 14 at 3:00 REINZELLE MARTIN 1

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### Describing the universal covering map for the twice punctured complex plane

jan 11 at 2:43 Aakumadula 2,8851513

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### Is Li(x) the best possible approximation to the prime-counting function?

jul 4 10 at 18:36 Will Jagy 12.5k12645

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### Cohomology of sheaves in different Grothendieck topologies

sep 26 at 11:01 Thomas Geisser 47145

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### Are all Galois cohomology groups also étale cohomology groups?

jun 19 10 at 13:39 Sam Derbyshire 2,59132144

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