Skip to main content
MathOverflow
Junyan Xu's user avatar
Junyan Xu's user avatar
Junyan Xu's user avatar
Junyan Xu
  • Member for 14 years, 6 months
  • Last seen this week
  • Bethesda, MD
Profile Activity
Stats
718
reputation
128k
reached
10
answers
4
questions
Communities
View all
Badges
View all badges
1
gold badge
10
silver badges
17
bronze badges
Top tags
View all tags
24
Score
4
Posts
29
Posts %
24
Score
2
Posts
14
Posts %
10
Score
1
Posts
7
Posts %
10
Score
1
Posts
7
Posts %
10
Score
1
Posts
7
Posts %
10
Score
1
Posts
7
Posts %
Top posts
View all questions and answers
24
Examples of theorems where numerical bounds on $\pi$ played a role
May 13
20
Which popular games are the most mathematical?
Oct 7, 2011
10
Which manifolds are homeomorphic to simplicial complexes?
Apr 21, 2011
8
Naturally occurring orderings
Apr 16, 2011
7
Relation between combinatorial manifolds and PL manifolds
Jan 26, 2012
6
bad reduction of a rational surface
Nov 30, 2017
6
Most helpful math resources on the web
Dec 20, 2011
6
Errata for Atiyah–Macdonald
Mar 5, 2013
5
Hall's treatment of algebraic operations
Oct 6, 2011
5
What Are Some Naturally-Occurring High-Degree Polynomials?
Jan 7, 2012
Top network posts
View all network posts
13
Proof of recursive formula for "fusible numbers"
10
If $AB = I$ then $BA = I$
8
Is $\{0,1\}^{\omega_1}$ sequentially compact?
6
Is there a $31$-dimensional manifold with 496 differential structures?
5
"Adding one dimension" to an infinite dimensional topological vector space