Alex Mathers

Member for 8 years, 2 months
Last seen this week

mathweb.ucsd.edu/~amathers
San Diego, CA, USA

Summary

Reputation

17,816

17.8k
15.2k
12.5k

2020
2021
2022
2023

Next tag badge

abstract-algebra

334/400 score

125/80 answers

Badges

2

26

70

Newest

Popular Question

Next badge

48/80

Deputy

Answers

View all 436 answers

Score Activity Newest

31

What is an easy example of non-Noetherian domain?

Jun 9, 2016

27

What is the use of the chain rule?

Jul 2, 2015

24

What is the original source of "fiber" in mathematics?

Nov 6, 2017

20

How does advancing through the math major work?

Feb 11, 2016

14

Are basis elements of a topology always open?

Apr 23, 2017

Questions

View all 79 questions

Score Activity Newest Views

12

Show a scheme is integral if and only if it is irreducible and reduced.

Jan 4, 2017

11

Prove that a free group of rank $\ge2$ is centerless and torsion-free

Apr 24, 2016

10

Is it possible to find a complex vector bundle on $S^2$ with nonzero first Chern class, which is trivial as a real vector bundle?

Mar 29, 2017

8

Show $R$ is right-Artinian but not left-Artinian

Nov 16, 2015

7

Is there a rigorous way of saying, "if $G$ and $H$ are isomorphic then $G$ and $H$ share all the same properties"?

May 12, 2016

Tags

View all 218 tags

abstract-algebra

334

Score

140

posts

algebraic-geometry

152

Score

76

posts

linear-algebra

136

Score

60

posts

ring-theory

134

Score

53

posts

commutative-algebra

122

Score

54

posts

Reputation

+10

$G$ infinite where every non trivial proper subgroup is maximal, show $G$ is simple

+10

What does mean by "algebraic closure of $\mathbb Q$ in $\mathbb Q_p$"?

+10

Exercise 5.20 from John Lee's ISM. Every open subset of a immersed submanifold $S$ in the subspace topology is also open in the submanifold topology

+10

Is it possible to find a complex vector bundle on $S^2$ with nonzero first Chern class, which is trivial as a real vector bundle?

Badges

View all badges

2

gold badges

Electorate

Apr 18, 2016
Fanatic

Jun 25, 2016

26

silver badges

Sportsmanship

Jun 15, 2016
Booster

Jun 30, 2021
Pundit

Jan 29, 2020

70

bronze badges

commutative-algebra

Oct 14, 2021
algebraic-geometry

Apr 7, 2020
ring-theory

Sep 22, 2020

Accounts

17.8k
2
26
70

456
3
14

151
1

Meta Stack Exchange

101
1

Proof Assistants

101
1

Active bounties (0)

Active Offered Earned

This user has no active bounties

Votes cast

1,840

upvotes

103

downvotes

1,049

question votes

894

answer votes

1

this month