Monotonicity of the p-cell a-function under the two-sided p-preorder
Let WWW be the Weyl group under consideration, and let p ac:W→R≥0{}^{p} \!\mkern 1mu {\mathbf a}_{\mathbf c}:W\to\mathbb{R}_{\ge 0}pac:W→R≥0 be the function obtained by extending the cell invariant…