User user2330

63 votes

22 answers

44k views

What are the worst notations, in your opinion? [closed]

asked Mar 18, 2010 at 14:49

29 votes

3 answers

7k views

Non finitely-generated subalgebra of a finitely-generated algebra

asked Dec 9, 2010 at 18:05

23 votes

6 answers

7k views

Noether's normalization lemma over a ring A

asked Oct 15, 2010 at 11:41

20 votes

6 answers

3k views

Is a functor which has a left adjoint which is also its right adjoint an equivalence ?

asked Dec 5, 2009 at 22:27

14 votes

2 answers

8k views

Choosing the algebraic independent elements in Noether's normalization lemma

asked Oct 15, 2010 at 11:39

12 votes

4 answers

7k views

Definition of étale for rings

asked Dec 10, 2009 at 13:05

11 votes

2 answers

891 views

Why the roots of unity are the analogs of constants ?

asked Jun 14, 2010 at 13:55

7 votes

7 answers

3k views

A good place where to learn about derived functors

asked Feb 4, 2010 at 14:34

7 votes

2 answers

458 views

A technical question about derivations of sheaves on group schemes

asked Dec 9, 2009 at 17:51

6 votes

7 answers

3k views

Are two sheaves that are locally isomorphic globally isomorphic ?

asked May 12, 2010 at 10:21

4 votes

3 answers

525 views

Is there a reason for defining the differential forms before the vector fields ?

asked Jun 3, 2010 at 18:34

4 votes

3 answers

5k views

Properties stable under base change in algebraic geometry

asked Apr 8, 2010 at 15:56

2 votes

0 answers

749 views

Is there a relation between the tangent bundle of a scheme and the tangent bundle of the associated reduced scheme ?

asked Apr 16, 2010 at 14:02

2 votes

3 answers

835 views

Cohomology of sheaves for sites and Galois cohomology

asked Mar 1, 2010 at 15:18

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14 Questions

What are the worst notations, in your opinion? [closed]

Non finitely-generated subalgebra of a finitely-generated algebra

Noether's normalization lemma over a ring A

Is a functor which has a left adjoint which is also its right adjoint an equivalence ?

Choosing the algebraic independent elements in Noether's normalization lemma

Definition of étale for rings

Why the roots of unity are the analogs of constants ?

A good place where to learn about derived functors

A technical question about derivations of sheaves on group schemes

Are two sheaves that are locally isomorphic globally isomorphic ?

Is there a reason for defining the differential forms before the vector fields ?

Properties stable under base change in algebraic geometry

Is there a relation between the tangent bundle of a scheme and the tangent bundle of the associated reduced scheme ?

Cohomology of sheaves for sites and Galois cohomology