ASKSAGE: Sage Q&A Forum - RSS feedhttps://ask.sagemath.org/questions/Q&A Forum for SageenCopyright Sage, 2010. Some rights reserved under creative commons license.Thu, 21 Oct 2021 20:17:54 +0200Non-Symmetric Macdonald expansionhttps://ask.sagemath.org/question/59434/non-symmetric-macdonald-expansion/I want to expand a given polynomial in $n$ variables, homogeneous of degree $k$ as a linear combination of Non-Symmetric Macdonald polynomials $E_{\alpha}$ where $\alpha$ varies over $\mathbb{Z}^n_{\geq 0}$ with $\sum \alpha_i = k$.
Background: We know that these Macdonald polynomials do indeed form a basis of the vector space of homogeneous degree $k$ polynomials in $n$ variables. The Non-Symmetric Macdonald polynomials I am interested in is the type $GL_n$ kind. And their sage implementation can be found here: [sage documentation](https://doc.sagemath.org/html/en/reference/combinat/sage/combinat/sf/ns_macdonald.html)
Bottom line is that we have a basis of a vector space already implemented in sage. Now how do we use it to compute coefficients of any vector when written in terms of this basis? mathstudentThu, 21 Oct 2021 20:17:54 +0200https://ask.sagemath.org/question/59434/symmetric skew Macdonald polynomialshttps://ask.sagemath.org/question/10011/symmetric-skew-macdonald-polynomials/Is there a *correct* way to compute skew Macdonald polynomials in sage? The routine skew_by does not seem to give the right answer (far from it). Probably due to the fact that "zee" is not defined properly somewhere.dbThu, 11 Apr 2013 15:10:09 +0200https://ask.sagemath.org/question/10011/