Reputation
1,832
Top tag
Next privilege 2,000 Rep.
Edit questions and answers
Badges
5 17
Newest
 Caucus
Impact
~118k people reached

  • 0 posts edited
  • 0 helpful flags
  • 30 votes cast
May
6
revised Combinatorial definition of Hall–Littlewood polynomials (sum over SSYT?)
added 157 characters in body
May
6
comment Combinatorial definition of Hall–Littlewood polynomials (sum over SSYT?)
It depends what you mean by explicit; You can easily write this as a sum over a family of tableaux, with some not-so-difficult combinatorial statistics on said tableaux.
May
4
answered Combinatorial definition of Hall–Littlewood polynomials (sum over SSYT?)
Mar
22
comment Determinant of a Vandermonde matrix of roots of monic polynomial with integer coefficients
Ah, right, that's true... was too quick there, haha.
Mar
22
answered Determinant of a Vandermonde matrix of roots of monic polynomial with integer coefficients
Dec
8
awarded  Caucus
Sep
5
answered Continuity of conjugate of $z$: $f(z)=\bar z$
Sep
4
comment Polygons inscribed in circles, with integer sides and integer radius
Note the similarity with the question about existence of perfect cuboids, i.e., cuboids with integer side lengths, integer side diameters, and integer space diameters.
Sep
4
asked Polygons inscribed in circles, with integer sides and integer radius
Aug
11
comment Tiling with polyominos
You mean, Taylor discovered a tile that can only tile in a non-periodical manner.
Aug
8
awarded  Yearling
Jul
2
awarded  Curious
Jun
7
comment On combining $n$ and $n^2$ into one number
@BenjaminDickman: Why discriminate on age? Perhaps it might be suitable for math.stackexchange, but it is seemingly a non-trivial question.
Jun
7
comment Show, by the element method that, for all subsets P, Q, and R of U, (P − Q) ∩ (R − Q) = (P ∩ R) − Q.
Draw a picture. Venn diagrams is your friend. Clarification: This type of problem, can easily be proved using Venn diagrams. Even an elementary picture, can be considered as a proof. In this case, draw 3 circles, as on the wikipedia page, and identify left hand side, and right hand side in the picture. Note that the regions for both "interpretations" are the same.
Jun
7
answered Is $i$ irrational?
Jun
7
comment Number of solutions to sudoku puzzle
@Jeff: General Sudoku ($n^2 \times n^2$ board) is NP-complete. The and the 9x9-board can be reduced to a SAT-problem, so it depends on your efficiency of the SAT-solver. However, this is equivalent to trying to solve the puzzle, I would say. If there was a quick way for 9x9-then most likely, this generalizes to all sizes, and you would become famous/assassinated by CIA.
Jun
7
asked Number of solutions to sudoku puzzle
Jun
1
comment Evaluate $ \int_{0}^{\frac{\pi}{2}}\frac{1}{(1+x^2)(1+\tan x)}\,\mathrm dx$
I think this is a typo; tan should perhaps be arctan in the question. Then things makes sense.
May
29
comment compact and convex set
How about using weak inequality in your definition, instead of strict? Is that what you mean? What are $X_1,X_2$ and $H$? Vectors?
Mar
22
awarded  Tumbleweed