On q-integrals over order polytopes

Jang Soo Kim, Dennis Stanton

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

A combinatorial study of multiple q-integrals is developed. This includes a q-volume of a convex polytope, which depends upon the order of q-integration. A multiple q-integral over an order polytope of a poset is interpreted as a generating function of linear extensions of the poset. Specific modifications of posets are shown to give predictable changes in q-integrals over their respective order polytopes. This method is used to combinatorially evaluate some generalized q-beta integrals. One such application is a combinatorial interpretation of a q-Selberg integral. New generating functions for generalized Gelfand–Tsetlin patterns and reverse plane partitions are established. A q-analogue to a well known result in Ehrhart theory is generalized using q-volumes and q-Ehrhart polynomials.

Original languageEnglish (US)
Pages (from-to)1269-1317
Number of pages49
JournalAdvances in Mathematics
Volume308
DOIs
StatePublished - Feb 21 2017

Bibliographical note

Funding Information:
The first author was supported by NRF grants (NRF-2016R1D1A1A09917506) and (NRF-2016R1A5A1008055), and the TJ Park Science Fellowship. The second author was supported by NSF grant DMS-1148634.

Keywords

  • Order polytope
  • Reverse plane partition
  • q-Ehrhart polynomial
  • q-Integral
  • q-Selberg integral

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