User Greg Muller

366 votes

What are some examples of colorful language in serious mathematics papers?

answered Apr 23, 2010 at 19:54

105 votes

Accepted

How should one think about sheafification and the difference between a sheaf and a presheaf

answered Nov 7, 2010 at 21:49

55 votes

Describe a topic in one sentence.

answered Oct 24, 2009 at 14:40

47 votes

Best algebraic geometry textbook? (other than Hartshorne)

answered Oct 25, 2009 at 13:47

46 votes

How to memorise (understand) Nakayama's lemma and its corollaries?

answered Apr 12, 2011 at 21:57

34 votes

Accepted

What is sheaf cohomology intuitively?

answered Sep 16, 2010 at 22:07

23 votes

Accepted

How much theory works out for "almost commutative" rings?

answered Oct 24, 2009 at 6:00

21 votes

Why would one expect a derived equivalence of categories to hold?

answered Mar 12, 2010 at 21:37

20 votes

Why is the exterior algebra so ubiquitous?

answered Oct 21, 2009 at 17:31

18 votes

What is the "right" definition of a ring?

answered Oct 27, 2009 at 4:59

17 votes

Accepted

Why is algebraic geometry so over-represented on this site?

answered Nov 20, 2009 at 18:36

17 votes

Accepted

When are dual modules free?

answered Nov 8, 2009 at 5:23

17 votes

Can a module be an extension in two really different ways?

answered Oct 14, 2010 at 17:22

15 votes

What, if anything, makes homogeneous polynomials so great?

answered Jun 2, 2010 at 0:09

15 votes

Lecture notes on representations of finite groups

answered Nov 21, 2009 at 19:48

14 votes

Elementary $\mathrm{Ext}^1$ intuition

answered Oct 25, 2009 at 23:42

10 votes

Accepted

Different definitions of the dimension of an algebra

answered Oct 25, 2009 at 23:37

10 votes

Proof a Weyl Algebra isn't isomorphic to a matrix ring over a division ring

answered Nov 8, 2009 at 5:09

10 votes

Accepted

Simple examples for the use of spectral sequences

answered May 3, 2010 at 4:19

10 votes

Applications of Stacks

answered Oct 16, 2010 at 15:38

9 votes

Free resolution dimension?

answered Jun 8, 2010 at 18:03

8 votes

What conditions are needed for $-\otimes_A B$ to be faithful?

answered Dec 2, 2010 at 17:52

8 votes

Proper classes and their consequences

answered Dec 4, 2010 at 21:49

8 votes

Accepted

Do affine schemes form a Mal'cev category?

answered Jan 10, 2011 at 14:15

8 votes

Are cluster variables prime elements?

answered Aug 17, 2011 at 7:05

6 votes

"Understanding" $\mathrm{Gal}(\bar{\mathbb{Q}}/\mathbb{Q})$

answered Oct 27, 2009 at 13:39

6 votes

Why Drinfel'd-Jimbo-type quantum groups?

answered Nov 15, 2009 at 15:46

6 votes

Good introductory references on algebraic stacks?

answered Oct 24, 2009 at 0:22

5 votes

Examples and intuition for arithmetic schemes

answered Oct 20, 2009 at 14:20

5 votes

Idempotents in Rings of Differential Operators

answered Nov 16, 2010 at 17:47

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45 Answers

What are some examples of colorful language in serious mathematics papers?

How should one think about sheafification and the difference between a sheaf and a presheaf

Describe a topic in one sentence.

Best algebraic geometry textbook? (other than Hartshorne)

How to memorise (understand) Nakayama's lemma and its corollaries?

What is sheaf cohomology intuitively?

How much theory works out for "almost commutative" rings?

Why would one expect a derived equivalence of categories to hold?

Why is the exterior algebra so ubiquitous?

What is the "right" definition of a ring?

Why is algebraic geometry so over-represented on this site?

When are dual modules free?

Can a module be an extension in two really different ways?

What, if anything, makes homogeneous polynomials so great?

Lecture notes on representations of finite groups

Elementary $\mathrm{Ext}^1$ intuition

Different definitions of the dimension of an algebra

Proof a Weyl Algebra isn't isomorphic to a matrix ring over a division ring

Simple examples for the use of spectral sequences

Applications of Stacks

Free resolution dimension?

What conditions are needed for $-\otimes_A B$ to be faithful?

Proper classes and their consequences

Do affine schemes form a Mal'cev category?

Are cluster variables prime elements?

"Understanding" $\mathrm{Gal}(\bar{\mathbb{Q}}/\mathbb{Q})$

Why Drinfel'd-Jimbo-type quantum groups?

Good introductory references on algebraic stacks?

Examples and intuition for arithmetic schemes

Idempotents in Rings of Differential Operators