All restrictions of reflection arrangements are gamma-positive; type B Chow polynomials admit an explicit combinatorial formula, and intermediate type D restrictions interpolate arithmetically between B and D invariants.
Shellability of posets of labeled partitions and arrangements defined by root systems
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On gamma-vectors and Chow polynomials of restrictions of reflection arrangements
All restrictions of reflection arrangements are gamma-positive; type B Chow polynomials admit an explicit combinatorial formula, and intermediate type D restrictions interpolate arithmetically between B and D invariants.