Suijie Wang

activity

20242026

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4 papers · 1 filter

math.CO2026

Interval Deformations of Coxeter Arrangements

Yanru Chen, Ang Li, Suijie Wang

We study integer-interval deformations of Coxeter arrangements of types $A$ , $B$ , and $D$ , assigning an integer interval to each root direction through an integer-valued root funct…

math.CO2026

Log-Concavity of Conic Intrinsic Volumes

Houshan Fu, Suijie Wang

Let $n \geq 1$ and $C \subseteq R^{n}$ be a closed convex cone with conic intrinsic volumes $v_{0} (C), \dots, v_{n} (C)$ . We prove the long-standing log-concavity conjecture for this s…

math.CO2026

Characteristic Polynomials of Graph- and Digraph-Deleted Catalan Arrangements

Yanru Chen, Ang Li, Suijie Wang

We develop a finite-field stratification for characteristic polynomials of deletion subarrangements of the full $m$ -Catalan arrangement. It reduces the count to cyclic placements o…

math.CO2026

Convolution-type Identity for Characteristic Polynomials of Geometric Semilattices

Yanru Chen, Houshan Fu, Ang Li +1

We establish a convolution formula for the characteristic polynomial of a finite geometric semilattice $M$ : \[ χ(M,st)=\sum_{X\in \underline{M}} s^{r-{\rm rk}_{\underline{M}}(X)}χ(…