The dual flagged Weyl character is zero-one if and only if the defining diagram is multiplicity-free, namely it avoids twelve listed subconfigurations up to column swap.
On the support of Grothendieck polynomials
1 Pith paper cite this work. Polarity classification is still indexing.
1
Pith paper citing it
abstract
Grothendieck polynomials $\mathfrak{G}_w$ of permutations $w\in S_n$ were introduced by Lascoux and Sch\"utzenberger in 1982 as a set of distinguished representatives for the K-theoretic classes of Schubert cycles in the K-theory of the flag variety of $\mathbb{C}^n$. We conjecture that the exponents of nonzero terms of the Grothendieck polynomial $\mathfrak{G}_w$ form a poset under componentwise comparison that is isomorphic to an induced subposet of $\mathbb{Z}^n$. When $w\in S_n$ avoids a certain set of patterns, we conjecturally connect the coefficients of $\mathfrak{G}_w$ with the M\"obius function values of the aforementioned poset with $\hat{0}$ appended. We prove special cases of our conjectures for Grassmannian and fireworks permutations.
fields
math.CO 1years
2024 1verdicts
CONDITIONAL 1representative citing papers
citing papers explorer
-
Zero-one dual characters of flagged Weyl modules
The dual flagged Weyl character is zero-one if and only if the defining diagram is multiplicity-free, namely it avoids twelve listed subconfigurations up to column swap.