Qiaochu Yuan

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117,712 reputation

7245462

bio	website	math.berkeley.edu/~qchu
	location	Berkeley, CA
	age	22
visits	member for	2 years, 10 months
	seen	9 mins ago
stats	profile views	40,792

I'm a first-year graduate student in pure mathematics at UC Berkeley. You can contact me at qchu[at]math[dot]berkeley[dot]edu.

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1,831 Answers

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255	Mathematical difference between white and black notes in a piano
134	Does Pi contain all possible number combinations?
94	Is it possible to represent every huge number in abbreviated form?
83	Proof that $C\exp(x)$ is the only set of functions for which $f(x) = f'(x)$
82	Is infinity a number?

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117,712 Reputation

+10	Is gcd the right adjoint of something?
+40	How does one show that two functors are not isomorphic?
+10	Normal subgroup if conjugate subgroup is subset
+10	Zero probability and impossibility

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56 Questions

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73	Intuition for the definition of the Gamma function?
42	Quadratic reciprocity via generalized Fibonacci numbers?
35	What's the point of studying topological (as opposed to smooth, PL, or PDiff) manifolds?
29	What structure does the alternating group preserve?
29	What is the spectral theorem for compact self-adjoint operators on a Hilbert space actually for?

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357 Tags

1k abstract-algebra × 255	695 calculus × 73
856 linear-algebra × 190	541 combinatorics × 98
842 number-theory × 113	529 general-topology × 89
712 soft-question × 94	498 category-theory × 121
699 group-theory × 125	427 sequences-and-series × 59

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15 Accounts

$Mathematics Stack Exchange$	Mathematics	117,712 rep	7245462
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$TeX - LaTeX Stack Exchange$	TeX - LaTeX	319 rep	38
	Stack Overflow	308 rep	147
	Arqade	307 rep	29

109 Badges

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Nice Question × 33	Caucus × 3
Enlightened × 152	probability-theory
Nice Answer × 338	functional-analysis
Good Answer × 50	Notable Question × 2
Good Question × 6	general-topology

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5,654 Votes Cast

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