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1d
accepted Non-regular languages fulfilling the Pumping Lemma
2d
asked Non-regular languages fulfilling the Pumping Lemma
Jan
6
comment Distance between two knots
You might be interested in the work by Stasiak (the famous 1/7 writhe guy :-) who made a paper on the, well, I call it "genealogy" of knots. Should be something like Stasiak&Flammini, "Natural classifications of knots". (Oh, and I extended that work long before that paper came out :-)
Dec
11
awarded  Yearling
Nov
29
comment A property of Mersenne primes
You say "unusually". Is this the only f which has the properties needed for the proof or do we have some leeway, like A*y^2+B instead of y^2?
Nov
29
accepted A property of Mersenne primes
Nov
28
asked A property of Mersenne primes
Oct
30
awarded  Popular Question
Oct
24
awarded  Popular Question
Sep
28
asked Sum rules for Clebsch-Gordan series
Aug
10
comment Highest weight formulas for quadratic Casimir and dimension for the simply laced Lie algebras
In fact, this question can be closed: a) I found a Chinese (:-) site which wonderfully explained how to apply the Weyl formula step by step, and I immediately understood everything. It IS simple but I never would have understood your standard abstract textbook. And b), the formula for the quantum dimension will be automatically correct for the Casimir by the replacements I described, but not in reverse - you can do nice fully general Casimir formulas for laced Dynkin diagrams OR Bn+Cn+F4, but unfortunately, this doesn't hold for the quantum dimensions and my work was a bit pointless.
Aug
10
comment Highest weight formulas for quadratic Casimir and dimension for the simply laced Lie algebras
In fact, this questio
Aug
8
asked Highest weight formulas for quadratic Casimir and dimension for the simply laced Lie algebras
Jul
15
revised Quadratic Casimirs of the E7 series
And a typo. Sigh...
Jul
15
revised Quadratic Casimirs of the E7 series
Argl. Example wasn't formulated precisely enough.
Jul
15
revised Quadratic Casimirs of the E7 series
example given
Jul
15
asked Quadratic Casimirs of the E7 series
Jul
8
awarded  Popular Question
Jun
24
asked Distiguishing mutant knots
Jun
17
comment Noncommutative fusion categories
Doesn't matter insofar as I just fell over Haagerup 2 (also called H6) in arxiv1102.2631v2 which I forgot - so we're down to rank 6 anyway.