Skip to main content
Mathematics
David Zhang's user avatar
David Zhang's user avatar
David Zhang's user avatar
David Zhang
  • Member for 11 years, 1 month
  • Last seen more than a week ago
Profile Activity
Stats
8,875
reputation
119k
reached
23
answers
60
questions
Communities
View all
About

Second-year undergraduate student at Vanderbilt University studying math, physics, and computer science.

Badges
View all badges
2
gold badges
39
silver badges
63
bronze badges
Top tags
View all tags
40
Score
4
Posts
5
Posts %
19
Score
6
Posts
7
Posts %
16
Score
7
Posts
8
Posts %
8
Score
7
Posts
8
Posts %
5
Score
9
Posts
11
Posts %
3
Score
6
Posts
7
Posts %
Top posts
View all questions and answers
111
Is the derivative the natural logarithm of the left-shift?
Jun 24, 2013
82
Besides proving new theorems, how can a person contribute to mathematics?
Jan 2, 2015
73
Why does this "miracle method" for matrix inversion work?
Aug 16, 2015
58
Are there any Turing-undecidable problems whose undecidability is independent of the Halting problem?
Jun 16, 2015
50
Is every axiom in the definition of a vector space necessary?
Aug 28, 2015
32
Does every infinite field contain a countably infinite subfield?
Nov 7, 2015
31
Should a high school introductory calculus class teach $\varepsilon$-$\delta$ proofs?
Aug 1, 2013
30
A riddle for 2015
Jan 2, 2015
28
Is there an easy way to see that this simple recurrence is 9-periodic? [duplicate]
Apr 22, 2016
26
Notation of the differential operator
Jul 22, 2015
Top network posts
View all network posts
598
How can I tell if a string repeats itself in Python?
117
Am I morally obligated to pursue a career in medicine?
52
Is there an explicit formula for the hessian of "Determinant"?
32
For positive definite $A,B$ why does $AB+BA$ tend to be positive definite?
29
Generating 250 random points crashes the kernel, but not 249