Relative combinatorial invariance conjecture for relative R-polynomials
Let be a finite Coxeter system. For a subset , write for the corresponding standard parabolic subgroup. For pairs in finite Coxeter systems, let be their directed Bruhat intervals and let denote the -relative -polynomial. Relative combinatorial invariance conjecture. For every finite Coxeter system , there is an assigned subset such that, whenever two Bruhat intervals are isomorphic by and every edge satisfies
one has
This is proposed as a relative analogue of combinatorial invariance, formulated through -relative -polynomials. Its status is not specified in the supplied text.
References
Primary source
Maxim Gurevich and Chuijia Wang, “Parabolic recursions for Kazhdan-Lusztig polynomials and the hypercube decomposition”, arXiv:2303.09251 (2023).
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