Results 81 to 90 of about 167 (109)
Existence Results for a Class of Semilinear Elliptic Systems
, 2020 . In this paper, we study the existence of nontrivial solutions for the problem where Ω is bounded domain in R N and h 1 ,h 2 ∈ L 2 (Ω). The existence result is obtained by using the Leray-Schauder degree under the following condition on the ...
Moussaoui Abdelkrim, Khodja Brahim
core
Some theorems on the q-analogue of the generalized stirling numbers
, 2011 In this paper, we establish more properties for the q-analogue of the unied generalization of Stirling numbers including the vertical and horizontal recurrence relations, and the rational generating function.
Husna Zayadi
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Three enumeration formulas of standard young tableaux of truncated shapes
, 2019 In this paper we consider the enumeration of three kinds of standard Young tableaux (SYT) of truncated shapes by use of the method of multiple integrals.
Sun, Ping
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Parity Reversing Involutions on Plane Trees and 2-Motzkin Paths
, 2005 . The problem of counting plane trees with n edges and an even or an odd number of leaves was studied by Eu, Liu and Yeh, in connection with an identity on coloring nets due to Stanley.
Louis W. Shapiro +2 more
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Labeling regions in deformations of graphical arrangements
Combining Carver's variant of the Farkas' lemma with the Flow Decomposition Theorem we show that the regions of any deformation of a graphical arrangement may be bijectively labeled with a set of weighted digraphs containing directed cycles of negative ...
Hetyei, Gábor
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A combinatorial proof of a result for permutation pairs
Open Mathematics, 2012 Mansour Toufik, Shattuck Mark
doaj +1 more source
Parity-alternating permutations and successions
Open Mathematics, 2014 Munagi Augustine
doaj +1 more source
Magic N-Cubes Form a Free Monoid
In this paper we prove a conjecture stated in an earlier paper [A-L]. The conjecture states that with respect to a rather natural operation, the set of N-dimensional magic cubes forms a free monoid for every integer N ? 1.
Allan Adler
core
Capacities: From Information Theory to Extremal Set Theory
Generalizing the concept of zero--error capacity beyond its traditional links to any sort of information transmission we give an asymptotic solution to several hard problems in extremal set theory within a unified, formally information--theoretic ...
J. Körner, L. Gargano, U. Vaccaro
core
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