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Aguila
  • Member for 6 years, 8 months
  • Last seen more than 2 years ago
791 votes
1 answer
43k views

A proof for $\dim(R[T])=\dim(R)+1$ without prime ideals?

210 votes
10 answers
69k views

Teaching myself differential topology and differential geometry

181 votes
14 answers
12k views

How do you revise material that you already half-know, without getting bored and demotivated?

  • 65.3k
80 votes
5 answers
30k views

What's going on with "compact implies sequentially compact"?

  • 1,935
64 votes
12 answers
39k views

How to prove every closed interval in R is compact?

  • 19.9k
47 votes
4 answers
29k views

Does the complex conjugate of an integral equal the integral of the conjugate?

44 votes
6 answers
22k views

What does a triple integral represent?

43 votes
2 answers
41k views

Simultaneous diagonalization of commuting linear transformations

37 votes
6 answers
40k views

What is the use of moments in statistics?

  • 753
37 votes
8 answers
15k views

How does Cramer's rule work?

  • 1,974
34 votes
1 answer
39k views

The definition of continuously differentiable functions

  • 643
33 votes
4 answers
11k views

Representing the multiplication of two numbers on the real line

  • 4,999
28 votes
5 answers
3k views

Material in a first course in algebraic geometry?

27 votes
6 answers
9k views

Reference for Algebraic Geometry

26 votes
2 answers
10k views

Is complex conjugation needed for valid inner product?

  • 812
20 votes
5 answers
6k views

The Frobenius Coin Problem

  • 471
20 votes
2 answers
7k views

Is fibre product of varieties irreducible (integral)?

  • 2,563
18 votes
3 answers
3k views

Primary ideals of Noetherian rings which are not irreducible

  • 58.4k
17 votes
2 answers
3k views

Finitely generated flat modules that are not projective

  • 53.8k
15 votes
1 answer
2k views

Self-study in real algebraic geometry

  • 22.3k
13 votes
2 answers
1k views

Is the dual of a finitely generated module finitely generated?

11 votes
2 answers
826 views

Associated Prime Ideals in a Noetherian Ring; Exercise 6.4 in Matsumura

  • 2,698
9 votes
3 answers
8k views

Prove $f$ entire and with a pole at infinity to be polynomial

  • 4,356
9 votes
1 answer
1k views

Irreducible component of fibre product of schemes

  • 2,490
8 votes
1 answer
4k views

All Sylow $p$-subgroups of $GL_2(\mathbb F_p)$?

8 votes
4 answers
2k views

A square matrix has the same minimal polynomial over its base field as it has over an extension field

8 votes
1 answer
2k views

Minimal and minimal associated prime ideals

  • 6,877
7 votes
1 answer
1k views

Motivation for Conjugate transpose of a matrix

  • 1,821
6 votes
1 answer
847 views

Finitely generated modules over noetherian rings isomorphic to their double duals

  • 1,409
6 votes
1 answer
934 views

Why is the Skyscraper Sheaf defined as it is?