Hauke Reddmann
  • Member for 11 years, 1 month
  • Last seen more than a week ago
  • Hamburg
Parodies of abstruse mathematical writing
2 votes

Meta variant: Does the Euler-Diderot incident count? E.g. here Because it is made-up?

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Commutators for quantum Lie algebras
1 votes

Third Option - Black: Any irrep - Blue: The adjoint irrep This looks like the correct linear combination which at least partially answers my problem: a) In the classic limit, the P term ...

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Polynomial invariants for unoriented links
1 votes

In Kauffmans "abstract tensor" approach, you can translate the Reidemeister moves to tensor equations. (This works equally well for directed and undirected case.) Of course, solving n^6 cubics and ...

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$6j$-symbols for $U_q({\mathfrak{sl}}_n)$ and colored HOMFLY polynomials
5 votes

Provided you have some "base data" (closed formulae for quadratic Casimirs and quantum dimensions, for instance), for "low" irreps the quantum 6j symbols might be calculated recursively using ...

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Quantum E6/E7 knot polynomials
0 votes

Dear Bertrand & Ross - could you check the following? I neither speak French nor Math :-) but I computed the same skein relations with magic and trickery (so my results are unproven, of course). ...

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Irreversible chess
4 votes

Don't you have to rule out pawn checks as well? A trivial example would be Ka6 Pb7 - Ka8. (A) Black plays Kb8. (B). Clearly there is no way back from B to A. The pawn moved only in retroanalysis :-) ...

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Random versions of deterministic problems
4 votes

This surely isn't what you had in mind either, but just one word: Collatz. (OK, more than one word: Assume that the 3n+1|n/2 process is completely random. Odd->even, even->1/2*even+1/2*odd. Now it is ...

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