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Algebraic Combinatorics

open access: yesUndergraduate Texts in Mathematics, 2018
Written by one of the foremost experts in the field, Algebraic Combinatorics is a unique undergraduate textbook that will prepare the next generation of pure and applied mathematicians. The combination of the author’s extensive knowledge of combinatorics
Stanley, Richard P, Richard P. Stanley
exaly   +4 more sources

CAKR: commutative algebra k-mer representations for genomics [PDF]

open access: yesNature Communications
Despite the availability of various sequence analysis models, comparative genomic analysis remains a challenge in genomics, genetics, and phylogenetics. Commutative algebra, a fundamental tool in algebraic geometry and number theory, has rarely been used
Faisal Suwayyid   +5 more
doaj   +2 more sources

Poset topology and homological invariants of algebras arising in algebraic combinatorics [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2014
We present a beautiful interplay between combinatorial topology and homological algebra for a class of monoids that arise naturally in algebraic combinatorics. We explore several applications of this interplay.
Stuart Margolis   +2 more
doaj   +1 more source

A Divided Difference Operator [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2013
We construct a divided difference operator using GKM theory. This generalizes the classical divided difference operator for the cohomology of the complete flag variety.
Nicholas Teff
doaj   +1 more source

Preface: Geometric and algebraic combinatorics [PDF]

open access: yesDesigns, Codes and Cryptography, 2012
The present issue of Designs, Codes and Cryptography is devoted to the theme “Geometric and Algebraic Combinatorics”. A central concept in this research area is the Association Scheme. On one hand it can be a tool for a better understanding of combinatorial objects, such as error correcting codes, block designs, point-line incidence geometries, and ...
Edwin R. van Dam, Willem H. Haemers
openaire   +3 more sources

Cut Vertices in Random Planar Maps [PDF]

open access: yes, 2023
The main goal of this paper is to determine the asymptotic behavior of the number X n of cut-vertices in random planar maps with n edges. It is shown that X n / n ¿ c in probability (for some explicit c > 0 ).
Benedikt Stufler   +6 more
core   +1 more source

Geometric and Algebraic Combinatorics [PDF]

open access: yes, 2015
The 2015 Oberwolfach meeting “Geometric and Algebraic Combinatorics” was organized by Gil Kalai (Jerusalem), Isabella Novik (Seattle), Francisco Santos (Santander), and Volkmar Welker (Marburg).

core   +2 more sources

Matroid relaxations and Kazhdan-Lusztig non-degeneracy [PDF]

open access: yes, 2022
In this paper we study the interplay between the operation of circuit-hyperplane relaxation and the Kazhdan--Lusztig theory of matroids. We obtain a family of polynomials, not depending on the matroids but only on their ranks, that relate the Kazhdan ...
Ferroni, Luis,   +3 more
core   +1 more source

Combinatorics of the Free Baxter Algebra [PDF]

open access: yesThe Electronic Journal of Combinatorics, 2006
We study the free (associative, non-commutative) Baxter algebra on one generator. The first explicit description of this object is due to Ebrahimi-Fard and Guo. We provide an alternative description in terms of a certain class of trees, which form a linear basis for this algebra.
Marcelo Aguiar, Walter Moreira
openaire   +4 more sources

Dissimilarity Vectors of Trees and Their Tropical Linear Spaces (Extended Abstract) [PDF]

open access: yesDiscrete Mathematics & Theoretical Computer Science, 2011
We study the combinatorics of weighted trees from the point of view of tropical algebraic geometry and tropical linear spaces. The set of dissimilarity vectors of weighted trees is contained in the tropical Grassmannian, so we describe here the tropical ...
Benjamin Iriarte Giraldo
doaj   +1 more source

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