HOME: BACK: More qt-analogs

# The number of standard tableaux of shape lambda

The number of standard tableaux of a given shape is given by the formula where the product runs over all cells s in partition lambda, a(s) represents the arm of the cell s in lambda, l(s) represents the leg of the cell s in lambda
(a(s) + l(s) + 1 is often refered to as the hook of a cell and so this is called the 'hook length formula').

Related to the Macdonald polynomials one has the q,t-coefficients and referred to as the q,t-Kostka polynomials.

If q and t are both set to 1, we have that and are both equal to the number of standard tableaux of shape lambda.

### Conjecture:

The polynomials (and ) have non-negative integer coefficients and
are a generating function for the number of standard tableaux of shape lambda.
This result (at least the postitivity part) is known for when it is of the form (2a1b), (32a1b), (42a1b), (a21b), (a1b) when it is of the form (a1b), (a21b), (a31b)
OR the conjugate partition of any of these results.

Note that if q=0 in the polynomial , we have the standard single variable Kostka polynomials which are known to t-count the column strict tableaux of shape and content .

Below are the tables for the transformed q,t-Kostka polynomials for n=2,3 and 4.  You may also find these tables up to n=7 in PDF/poscript and LaTeX form on this web site. and Maple programs by Stembridge and Garsia-Tesler.      