Results 101 to 110 of about 21,091,768 (168)

Bender–Knuth Billiards in Coxeter Groups

open access: yesForum of Mathematics, Sigma
Let $(W,S)$ be a Coxeter system, and write $S=\{s_i:i\in I\}$ , where I is a finite index set. Fix a nonempty convex subset $\mathscr {L}$ of W. If W is of type A, then $\mathscr {L}$ is the set of linear extensions of a poset,
Grant Barkley   +4 more
doaj   +1 more source

The poset of normalized ideals of numerical semigroups with multiplicity three

open access: yes
We study the poset of normalized ideals of a numerical semigroup with multiplicity three. We show that this poset is always a lattice, and that two different numerical semigroups with multiplicity three have non-isomorphic posets of normalized ...
S. Bonzio, P. A. García-Sánchez
core   +1 more source

Operad Structure of Poset Matrices [PDF]

open access: yes
This paper examines operad structures derived from poset matrices by formulating a set of new construction rules for poset matrices. In this direction, eleven different partial composition operations will be introduced as the basis for the construction ...
Giraudo, Samuele   +3 more
core   +1 more source

Random Fibonacci Words via Clone Schur Functions

open access: yesForum of Mathematics, Sigma
We investigate positivity and probabilistic properties arising from the Young–Fibonacci lattice $\mathbb {YF}$ , a 1-differential poset on words composed of 1’s and 2’s (Fibonacci words) and graded by the sum of the digits.
Leonid Petrov, Jeanne Scott
doaj   +1 more source

A Voronoi poset [PDF]

open access: yes, 1999
Given a set S of n points in general position we consider all kth order Voronoi diagrams on S for k n simultaneously We deduce symmetry relations for the number of faces number of vertices and number of circles of certain orders These symmetry ...
Lindenbergh, R.
core   +1 more source

Forbidden Subposets in the Cycle Poset

open access: yes
The cycle poset consists of the intervals of the cyclic permutation of the elements 1, 2, ... , n , ordered by inclusion. Suppose that F is a set of such intervals, none of them is a less than s others.
Behnia, Aysan   +2 more
core   +1 more source

A poset-based analysis of regional innovation at European level

open access: yes
This paper examines the performance of regional innovation across 220 European regions. A poset-based approach is adopted to obtain a ranking of the European regions, which is then compared with the results described in the Regional Innovation Scoreboard
Muzzioli S., Damiani F., De Baets B.
core   +1 more source

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