bio  website  math.mit.edu/~rstan 

location  
age  
visits  member for  5 years, 8 months 
seen  26 mins ago  
stats  profile views  10,432 
1d

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 $q^{jk}\left[ {nk\atop j}\right]$, where $\left[ {nk\atop j}\right]$ is the $q$binomial coefficient. A reference for this kind of combinatorics is Section 1.10 and Exercises 1.1741.202 of Enumerative Combinatorics, vol.\ 1, second ed. 
Jul 19 
answered  Number of nonzero terms in polynomial expansion (lower bounds) 