User Peter Arndt - MathOverflow

Peter Arndt

Member for 14 years, 6 months
Last seen more than a week ago

Mail:firstname.lastnameatpost…
Düsseldorf, Germany

136 Answers

Score Activity Newest

59 votes

Most interesting mathematics mistake?

answered Oct 21, 2009 at 17:05

44 votes

Accepted

Map of Number Theory

answered Jan 27, 2010 at 16:13

38 votes

K(F_1) = sphere spectrum?

answered Oct 21, 2009 at 12:43

38 votes

Extremely messy proofs

answered Mar 16, 2011 at 16:46

33 votes

What is sheaf cohomology intuitively?

answered Sep 17, 2010 at 10:39

28 votes

Connections between various generalized algebraic geometries (Toen-Vaquié, Durov, Diers, Lurie)?

answered Feb 29, 2012 at 0:33

26 votes

Accepted

Heuristic explanation of why we lose projectives in sheaves.

answered Dec 3, 2009 at 12:54

26 votes

Accepted

What does the classifying space of a category classify?

answered May 7, 2010 at 14:43

25 votes

What is the proper initiation to the theory of motives for a new student of algebraic geometry?

answered Jun 20, 2010 at 10:38

25 votes

Accepted

Several Topos theory questions

answered Oct 28, 2009 at 22:28

23 votes

Awfully sophisticated proof for simple facts

answered Oct 18, 2010 at 16:57

22 votes

When are two proofs of the same theorem really different proofs

answered Nov 2, 2009 at 17:33

22 votes

Fundamental Examples

answered Nov 11, 2009 at 12:17

22 votes

MaxSpec, Spec, ... "RadSpec"? Or, why not look at all radical ideals?

answered Feb 6, 2010 at 0:41

20 votes

How can I really motivate the Zariski topology on a scheme?

answered Feb 6, 2010 at 0:36

19 votes

"Philosophical" meaning of the Yoneda Lemma

answered Oct 29, 2009 at 3:06

19 votes

quadratic forms over fields of characteristic 2

answered Mar 21, 2012 at 0:07

17 votes

Is there a high-concept explanation for why "simplicial" leads to "homotopy-theoretic"?

answered Mar 16, 2011 at 1:43

17 votes

Sheaf cohomology and injective resolutions

answered Oct 19, 2009 at 12:46

16 votes

Is the category commutative monoids cartesian closed?

answered Mar 22, 2010 at 14:52

15 votes

What is the "universal problem" that motivates the definition of homotopy limits/colimits (and more generally "derived" functors)?

answered Sep 8, 2010 at 13:25

14 votes

Approaches to Riemann hypothesis using methods outside number theory

answered Aug 6, 2010 at 8:30

14 votes

The category of abelian group objects

answered Nov 9, 2010 at 14:16

14 votes

Analogue to covering space for higher homotopy groups?

answered Oct 20, 2009 at 22:24

13 votes

Finite type/finite morphism

answered Oct 21, 2009 at 12:25

13 votes

"Algebraic" topologies like the Zariski topology?

answered Jun 16, 2010 at 16:57

13 votes

How do you become a good listener?

answered Feb 20, 2010 at 20:06

13 votes

What are the different theories that the motivic fundamental group attempts to unify?

answered Jul 29, 2011 at 19:29

13 votes

Widely accepted mathematical results that were later shown to be wrong?

answered Oct 24, 2010 at 19:40

12 votes

Accepted

Which languages could appear on Weil's Rosetta Stone?

answered Sep 8, 2010 at 19:58

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