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visits member for 4 years, 9 months
seen Aug 13 '12 at 8:14

May
11
awarded  Nice Answer
Mar
10
awarded  Popular Question
Dec
12
answered Breaking down an impartial game into Nim equivalent
May
2
awarded  Nice Answer
Oct
19
revised Is there order to the number of groups of different orders?
edited body
Oct
19
comment Examples of common false beliefs in mathematics
Correcting that misunderstanding is crucial to prove that an accumulation point of a net is always the limit of some subnet, which does not hold for sequences.
Oct
16
answered Surprising behaviour of polynomial that generates the series 1,2,4,8,…2^(k-1)
Sep
11
awarded  Nice Answer
Aug
17
comment What are your favorite puzzles/toys for introducing new mathematical concepts to students?
There is also projective set, a version designed by a graduate student at Waterloo, which requires recognizing lines in five-dimensional projective space over the field with 2 elements.
Aug
17
comment What are your favorite puzzles/toys for introducing new mathematical concepts to students?
The 15 puzzle is a good way of introducing groupoids.
Jun
28
answered Do names given to math concepts have a role in common mistakes by students?
Jun
16
awarded  Critic
Jun
8
comment What are your experiences of handouts in mathematics lectures?
Victor, I agree. What I actually mean is that I want my one hour lecture plus $n-1$ hours reading the book/notes to be more useful for the student than $n$ hours reading the book/notes.
Jun
8
comment Do Lie algebroids pull back (along submersions)?
In particular, since in Theo's case $Y \to X$ was a vector bundle, then $phi^{**} A \to Y$ is the ``total space'' of a VB-algebroid $(\phi^{**}A, Y, A, X)$. See section 6.1 on arXiv:0810.0066. Not sure whether this is relevant, but since you mention "in trivialized case comes in pieces", it may.
Jun
8
answered What are your experiences of handouts in mathematics lectures?
Jun
8
comment What are your experiences of handouts in mathematics lectures?
That is what <a href="youtube.com/watch?v=WwslBPj8GgI">Eric Mazour</a> does in physics (but it is equally applicable in mathematics).
Jun
8
comment What are your experiences of handouts in mathematics lectures?
If this had been anybody but Ole Hald, I would be very skeptical.
Jun
7
comment Why does undergraduate discrete math require calculus?
To back up Noah's claim, I have taught topology and abstract algebra at Mathcamp without calculus as a prerequisite with no problem.
May
19
comment Examples of undergraduate mathematics separation from what mathematicians should know
I agree with Mike Skirvin about the Jordan/rational canonical forms: they do appear in problems in many areas. Even if they did not appear, I still consider them important just for illustrating the more general concept of "canonical form" (i.e., the choice of a particular representative of each equivalence class in an equivalence relation).
May
7
comment Examples of common false beliefs in mathematics
That there are two different notions that are called "locally compact" does not help.