Positivity for a $t$-analogue of refined Littlewood-Richardson rules

Jiaming Du, Emma Yu Jin, Xiaowei Lin

In 2010, Haglund, Luoto, Mason and van Willigenburg proved that the product of a Schur function $s_{\lambda }$ and a Demazure atom $A_{\gamma }$ expands positively in terms of Demazure atoms, and i…