Contingency tables and the generalized Littlewood–Richardson coefficients
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- by Mark Colarusso, William Q. Erickson and Jeb F. Willenbring PDF
- Proc. Amer. Math. Soc. 150 (2022), 79-94 Request permission
Abstract:
The Littlewood–Richardson coefficients $c^\lambda _{\mu \nu }$ give the multiplicity of an irreducible polynomial $\operatorname {GL}_n$-representation $F^{\lambda }_n$ in the tensor product of polynomial representations $F^{\mu }_n \otimes F^{\nu }_n$. In this paper, we generalize these coefficients to an $r$-fold tensor product of rational representations, and give a new method for computing them using an analogue of statistical contingency tables. We demonstrate special cases in which our method reduces to counting statistical contingency tables with prescribed margins. Finally, we extend our result from the general linear group to both the orthogonal and symplectic groups.References
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Additional Information
- Mark Colarusso
- Affiliation: Department of Mathematics and Statistics, University of South Alabama, Mobile, Alabama 36608
- MR Author ID: 877093
- Email: mcolarusso@southalabama.edu
- William Q. Erickson
- Affiliation: Department of Mathematical Sciences, University of Wisconsin–Milwaukee, 3200 North Cramer Street, Milwaukee, Wisconsin 53211
- ORCID: 0000-0001-5675-8484
- Email: wqe@uwm.edu
- Jeb F. Willenbring
- Affiliation: Department of Mathematical Sciences, University of Wisconsin–Milwaukee, 3200 North Cramer Street, Milwaukee, Wisconsin 53211
- MR Author ID: 662347
- ORCID: 0000-0002-1205-2153
- Email: jw@uwm.edu
- Received by editor(s): December 18, 2020
- Received by editor(s) in revised form: April 21, 2021
- Published electronically: October 12, 2021
- Communicated by: Jerzy Weyman
- © Copyright 2021 American Mathematical Society
- Journal: Proc. Amer. Math. Soc. 150 (2022), 79-94
- MSC (2020): Primary 20G20; Secondary 17B10, 05E10
- DOI: https://doi.org/10.1090/proc/15731
- MathSciNet review: 4335859