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comment Distributing points evenly on a sphere
For a couple of related papers, see arXiv:math.MG/0611451 and arXiv:math/0607446.
Jul
27
comment A question on permutations
@Turbo I have added some more details to my argument.
Jul
27
revised A question on permutations
more detailed argument
Jul
27
awarded  Nice Question
Jul
27
answered A question on permutations
Jul
26
revised An algebraic strengthening of the Saturation Conjecture
fixed incorrect terminology
Jul
26
comment An algebraic strengthening of the Saturation Conjecture
@DavidSpeyer You are right about the definition of Hall algebra. I have fixed this.
Jul
26
asked An algebraic strengthening of the Saturation Conjecture
Jul
26
comment A question on permutations
If I understand your question correctly, then we can take $K=1$ for $n>1$ . Let $\sigma_1$ be any permutation satisfying $\sigma_1(1)=n$. This works since in an alternating permutation as defined by your link, 1 occurs in an odd position and $n$ in an even position.
Jul
26
answered Is the top interval of a finite distributive lattice an hypercube lattice?
Jul
24
revised integral schur function over standard simplex
corrected misspelling
Jul
24
revised Number of nonzero terms in polynomial expansion (lower bounds)
typo corrected (an -> and)
Jul
23
awarded  Enlightened
Jul
23
awarded  Nice Answer
Jul
23
revised Number of nonzero terms in polynomial expansion (lower bounds)
corrected misspelling
Jul
22
answered Inducing representations from the stabilizer of a partition
Jul
20
awarded  Revival
Jul
20
answered Polya's theory of counting and commutative algebra
Jul
20
comment Counting subspaces
The number of $j$-dimensional subspaces of $V$ that are disjoint from a fixed $k$-dimensional subspace is $q^{jk}\left[ {n-k\atop j}\right]$, where $\left[ {n-k\atop j}\right]$ is the $q$-binomial coefficient. A reference for this kind of combinatorics is Section 1.10 and Exercises 1.174-1.202 of Enumerative Combinatorics, vol.\ 1, second ed.
Jul
19
answered Number of nonzero terms in polynomial expansion (lower bounds)