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Rasmus
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30
Definition of an algebra over a noncommutative ring
Apr 19, 2010
answer
15
Examples of non-metrizable spaces
Jan 14, 2011
answer
14
Examples of non Quillen-equivalent model categories having equivalent homotopy categories
Jul 4, 2013
question
13
What is the commutative analogue of a C*-subalgebra?
Aug 13, 2010
question
13
The derived category of integral representations of a Dynkin quiver
Apr 25, 2012
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13
Classification of long exact sequences
Aug 16, 2012
answer
12
KK-theory as a stable infinity-category and KU Mod
Aug 7, 2013
answer
11
A characterization of distinguished triangles in triangulated categories.
Feb 1, 2017
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11
Is Tor always torsion?
Jul 13, 2010
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10
Is Hartshorne's definition of the category of varieties natural?
Jul 7, 2010
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Does $G\cong G/H$ imply that $H$ is trivial?
51
Difference between "computation" and "calculation"
50
Why doesn't $0$ being a prime ideal in $\mathbb Z$ imply that $0$ is a prime number?
50
When you cook spaghetti, do you add olive oil to the boiling water?
49
Prove that $\lfloor0.999\dots\rfloor= ?$ $0$ or $1$?