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Number Volume 28, Issue 2 (2021) Year 2062

46 articles in this issue 

José Aliste-Prieto, Logan Crew, Sophie Spirkl, José Zamora

This paper has two main parts. First, we consider the Tutte symmetric function XB, a generalization of the chromatic symmetric function. We introduce a vertex-weighted version of XB and show that this function admits a deletion-contraction relation. We al... see more

Pags. P2.1  

João Miguel Santos

We compute, mimicking the Lascoux-Schützenberger type A combinatorial procedure, left and right keys for a Kashiwara-Nakashima tableau in type C. These symplectic keys have a similar role as the keys for semistandard Young tableaux. More precisely, our sy... see more

Pags. P2.29  

James Aaronson, David Ellis, Imre Leader

We show that the Union-Closed Conjecture holds for the union-closed family generated by the cyclic translates of any fixed set.

Pags. P2.3  

Jia Huang

The Norton product is defined on each eigenspace of a distance regular graph by the orthogonal projection of the entry-wise product. The resulting algebra, known as the Norton algebra, is a commutative nonassociative algebra that is useful in group theory... see more

Pags. P2.30  

Julien Courtiel, Andrew Elvey Price, Irène Marcovici

This paper solves an open question of Mortimer and Prellberg asking for an explicit bijection between two families of walks. The first family is formed by what we name triangular walks, which are two-dimensional walks moving in six directions (0°, 60°, 12... see more

Pags. P2.6