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Symmetric Decompositions and Real-Rootedness.
- Source :
-
IMRN: International Mathematics Research Notices . May2021, Vol. 2021 Issue 10, p7764-7798. 35p. - Publication Year :
- 2021
-
Abstract
- In algebraic, topological, and geometric combinatorics, inequalities among the coefficients of combinatorial polynomials are frequently studied. Recently, a notion called the alternatingly increasing property, which is stronger than unimodality, was introduced. In this paper, we relate the alternatingly increasing property to real-rootedness of the symmetric decomposition of a polynomial to develop a systematic approach for proving the alternatingly increasing property for several classes of polynomials. We apply our results to strengthen and generalize real-rootedness, unimodality, and alternatingly increasing results pertaining to colored Eulerian and derangement polynomials, Ehrhart |$h^\ast$| -polynomials for lattice zonotopes, |$h$| -polynomials of barycentric subdivisions of doubly Cohen–Macaulay level simplicial complexes, and certain local |$h$| -polynomials for subdivisions of simplices. In particular, we prove two conjectures of Athanasiadis. [ABSTRACT FROM AUTHOR]
- Subjects :
- *COMBINATORIAL geometry
*POLYNOMIALS
*SUBDIVISION surfaces (Geometry)
Subjects
Details
- Language :
- English
- ISSN :
- 10737928
- Volume :
- 2021
- Issue :
- 10
- Database :
- Academic Search Index
- Journal :
- IMRN: International Mathematics Research Notices
- Publication Type :
- Academic Journal
- Accession number :
- 150340700
- Full Text :
- https://doi.org/10.1093/imrn/rnz059