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Mathematics
Lee Mosher's user avatar
Lee Mosher's user avatar
Lee Mosher's user avatar
Lee Mosher
  • Member for 12 years, 9 months
  • Last seen this week
  • Rutgers University, Newark
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Mathematics professor at Rutgers University in Newark. Researcher in Topology, Geometry, and Geometric Group Theory. Currently specializing in the large scale geometry of $Out(F_n)$, the outer automorphism group of a free group of finite rank $n$.

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40
Why is Rationals w.r.t addition not an Isomorphism to Rationals w.r.t. multiplication?
May 22, 2015
answer
36
Repeatedly taking differences on a polynomial yields the factorial of its degree?
Jun 12, 2017
answer
36
Why are primes considered to be the "building blocks" of the integers?
Jan 11, 2015
answer
34
Is formal truth in mathematical logic a generalization of everyday, intuitive truth?
May 12, 2016
answer
33
The integral of a function on manifold and differential form
Jun 17, 2016
answer
33
Are there surfaces with more than two sides?
Apr 12, 2014
answer
31
Why is Banach–Tarski's paradox so interesting?
Sep 28, 2014
answer
30
When can a homomorphism be determined entirely by its generators
Aug 19, 2015
answer
26
Triangulation of Torus
Oct 1, 2014
answer
25
How to think about a quotient sets modulo an equivalence relation, and well-defined functions on the quotient set.
Jul 26, 2021
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Is it a "rule" of Math Stack Exchange that when asking a question, it's **never** good just to state the question?
18
Non-experts closing questions
14
Is "playing dumb" considered un-helpful?
11
Curious about exceptionally timely answers
7
If a question author receives an answer needing some editing, can the answer be edited by the question author so the answer author gets full credit?
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When has discrete understanding preceded continuous?
52
What is the point of teaching variance?
45
Conjugacy classes of $\mathrm{SL}_2(\mathbb{Z})$
40
In the United States, how do you get car insurance (auto liability) which is valid no matter what car you are driving?
40
Connected sum of topological manifolds