367 reputation
112
bio website
location
age
visits member for 2 years, 1 month
seen May 9 at 12:35

Jul
2
awarded  Curious
Jun
3
awarded  Nice Question
Sep
10
asked Are congruences difficult for beginners?
Sep
10
accepted Reference request: the Gaussian is determined by its moments
Sep
10
comment Reference request: the Gaussian is determined by its moments
Cool, will have a look, thank you!
Aug
26
asked Reference request: the Gaussian is determined by its moments
Aug
13
awarded  Popular Question
Jul
24
comment $PGL(n + 1)$ acts on sets of $n + 2$ points in $\mathbb{P}^n$ transitively: proof without determinants?
Thanks Ted. The key insight missed in my argument above is in "Namely, for any choice...", as it corresponds to where I mucked around with matrix minors.
Jul
24
accepted $PGL(n + 1)$ acts on sets of $n + 2$ points in $\mathbb{P}^n$ transitively: proof without determinants?
Jul
22
awarded  Yearling
Jul
22
asked $PGL(n + 1)$ acts on sets of $n + 2$ points in $\mathbb{P}^n$ transitively: proof without determinants?
May
14
awarded  Revival
Dec
12
asked Do students understand infinite series before they're informally introduced?
Oct
10
comment Hidden geometrical gems in Euclid's Elements?
The course is certainly not remedial. Math majors of mixed background, most of them future high school teachers. In my opinion it's been interesting so far, in the same way that point set topology is interesting (you have to reconsider what's "obvious" strictly in terms of what you've proved so far)... but it's beginning to wear thin.
Oct
9
asked Hidden geometrical gems in Euclid's Elements?
Sep
26
awarded  Tumbleweed
Aug
19
awarded  Teacher
Aug
10
comment What is the biggest number ever used in a mathematical proof?
I once saw a programming contest along the following lines: Write a C program, under 5K bytes, that outputs the biggest number possible. Assume (contrary to fact) that C can handle arbitrarily large integers and that your program has unlimited computational resources (i.e. memory). The winning entries were amazing.
Aug
10
awarded  Commentator
Aug
4
comment Dyslexia in group actions of $SL_2$ on binary cubic forms
I think one point I hadn't fully appreciated until I read this is that our choice of notation for function composition is arbitrary, but once we make this choice, this dictates that left actions and column vectors should naturally correspond to covariant functors.