Results 61 to 70 of about 369 (138)

Order dense injectivity of $S$-posets [PDF]

Categories and General Algebraic Structures with Applications, 2015
‎‎‎In this paper‎, ‎the‎ notion of injectivity with respect to order dense embeddings in ‎‎the category of $S$-posets‎, ‎posets with a monotone action of a‎ pomonoid $S$ on them‎, ‎is studied‎.
Leila Shahbaz
doaj  

On (po-)torsion free and principally weakly (po-)flat $S$-posets [PDF]

Categories and General Algebraic Structures with Applications, 2018
In this paper, we first consider (po-)torsion free and principally weakly (po-)flat $S$-posets, specifically  we discuss when (po-)torsion freeness implies principal weak (po-)flatness.
Roghaieh Khosravi, Xingliang Liang
doaj  

On direct products of S-posets satisfying flatness properties

TURKISH JOURNAL OF MATHEMATICS, 2014
In this paper we characterize pomonoids over which various flatness properties of S-posets are preserved under direct products.
openaire   +1 more source

Posets of h-vectors of standard determinantal schemes

Le Matematiche, 2015
We study the combinatorial structure of the poset H consisting of h-vectors of length s of codimension c standard determinantal schemes, defined by the maximal minors of a t × (t + c − 1) homogeneous, polynomial matrix.
Matey Mateev
doaj  

On Some General Tornheim-Type Series

Mathematics
In this paper, we solve the open problem posed by Kuba by expressing ∑j,k≥1Hk(u)Hj(v)Hj+k(w)jrks(j+k)t as a linear combination of multiple zeta values. These sums include Tornheim’s double series as a special case.
Kwang-Wu Chen
doaj   +1 more source

Rees factor S-posets satisfying Conditions (PWP)sw, (WP)sw and (Psw)

Proyecciones (Antofagasta)
In [{\it Comm. Algebra}, vol. 37, pp. 1995-2007], Golchin and Rezaei gave necessary and sufficient conditions for a Rees factor $S$-post $S/K$, by a convex proper right ideal $K$, to satisfy Conditions $(PWP)$ or $(WP)$. They also introduced two new \ Conditions \ \ $(PWP)_w$ \ \ and \\$(WP)_w$. In [{\it J. Sci. Islam. Repub.
Nouri, Leila, Khamechi, Pouyan
openaire   +2 more sources

Bender–Knuth Billiards in Coxeter Groups

Forum 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, Colin Defant, Eliot Hodges, Noah Kravitz, Mitchell Lee   +4 more
doaj   +1 more source

Measuring the digital inclusion of women: a poset-based approach to the women in digital scoreboard. [PDF]

Qual Quant, 2023
Damiani F, Rodríguez-Modroño P.
europepmc   +1 more source

Random Fibonacci Words via Clone Schur Functions

Forum 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

On General Alternating Tornheim-Type Double Series

Mathematics
In this paper, we express ∑n,m≥1ε1nε2mMn(u)Mm(v)nrms(n+m)t as a linear combination of alternating multiple zeta values, where εi∈{1,−1} and Mk(u)∈{Hk(u),H¯k(u)}, with Hk(u) and H¯k(u) being harmonic and alternating harmonic numbers, respectively.
Kwang-Wu Chen
doaj   +1 more source