39

Questions
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25
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7
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Why forgetful functors usually have LEFT adjoint?

jan 1 10 at 19:04 Reid Barton 14.4k●1●28●85

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16
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3
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Why is the decomposition theorem awesome?

dec 9 09 at 4:52 Ben Webster♦ 20.7k●1●44●114

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Which algebraic varieties admit a morphism to a curve?

aug 15 10 at 7:28 ABayer 1,474●1●9●17

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Why are finiteness conditions important (and how to recognize them)?

apr 3 12 at 17:42 Ostap Chervak 222●1●4●10

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Is there a “knot theory” for graphs?

oct 31 11 at 21:08 Roberto Frigerio 1,849●5●14

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2
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What’s the easiest example of a morphism of topoi that is not from that of a site?

apr 17 12 at 15:43 Filippo Alberto Edoardo 1,682●5●12

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5
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Why does the (S2) property of a ring correspond to the Hartogs phenomenon?

oct 13 at 1:41 Sándor Kovács 23.8k●2●52●73

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4
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How does one motivates the method of separation of variables when teaching PDE’s?

nov 16 10 at 13:54 Bob Terrell 428●1●6

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Does the derived category remember the homological dimension?

mar 5 11 at 19:18 Mariano Suárez-Alvarez 30.6k●7●68●153

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1
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Reverse Engineering to find deformation problem (from cohomology groups)?

apr 11 11 at 8:17 Stefan Waldmann 2,816●1●7●22

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