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1d

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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? 
1d

accepted  A property of Mersenne primes 
1d

asked  A property of Mersenne primes 
Oct
30 
awarded  Popular Question 
Oct
24 
awarded  Popular Question 
Sep
28 
asked  Sum rules for ClebschGordan 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. 
Jun
17 
asked  Noncommutative fusion categories 
Jun
11 
comment 
Fusion categories: If infinity were an integer
So, loosely, a based ring is a category iff it has a consistent (pentagon rule etc.) set of 6j symbols? 
Jun
10 
comment 
Fusion categories: If infinity were an integer
Owch! I begin to think that what I always called a "fusion category" is only a "based ring". (I check: Associative, commutative, 1 element, conjugate element. Uhm, can you give me a simple condition for fusion rules or Verlinde matrix that a based ring can be categorified?) 
Jun
10 
accepted  Fusion categories: If infinity were an integer 