Results 61 to 70 of about 158 (109)
Combinatorics of rectangulations: old and new bijections [PDF]
A rectangulation is a decomposition of a rectangle into finitely many rectangles. Via natural equivalence relations, rectangulations can be seen as combinatorial objects with a rich structure, with links to lattice congruences, flip graphs, polytopes ...
Felsner, Stefan +3 more
core +1 more source
Parity Reversing Involutions on Plane Trees and 2-Motzkin Paths [PDF]
, 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.
Chen, William Y.C. +5 more
core +1 more source
Bounded Littlewood identity related to alternating sign matrices
Forum of Mathematics, SigmaAn identity that is reminiscent of the Littlewood identity plays a fundamental role in recent proofs of the facts that alternating sign triangles are equinumerous with totally symmetric self-complementary plane partitions and that alternating sign ...
Ilse Fischer
doaj +1 more source
Generalization of (Q,L)-Fuzzy Soft Subhemirings of a Hemiring
, 2022 This paper investigates the properties and results of (Q,L)-fuzzy soft subhemirings ((Q,L)-FSSHR) of a hemiring R. The motivation behind this study is to utilize the concept of L-fuzzy soft set of a hemiring and to derive a few specific outcomes on (Q, L)
N. Anitha +5 more
core +1 more source
Diagonal operators, \(q\)-Whittaker functions and rook theory
We discuss the problem posed by Bender, Coley, Robbins and Rumsey of enumerating the number of subspaces which have a given profile with respect to a linear operator over the finite field \(\mathbb{F}_q\).
Ram, Samrith, Schlosser, Michael J.
core +1 more source
On Some Identities for k-Jacobsthal Numbers [PDF]
, 2013 The aim of this paper is to obtain Binet formula for k-Jacobsthal numbers. And also with the help of Binet formula we obtain some properties for the k-Jacobsthal numbers.
core
, 2010 . A centrosymmetric permutation is one which is invariant under the reversecomplement operation, or equivalently one whose associated standard Young tableaux under the Robinson-Schensted algorithm are both invariant under the Schützenberger involution ...
Matteo Silimbani, Mark F. Flanagan
core
On nested block designs geometry
Orthogonal designs, Orthogonal block structure, General balance, Commutativity of projectors, Commutative quadratic subspace, Primary 62J05, Secondary 05A15, 15A18,
Radosław Kala
core +1 more source
Topological recursion for fully simple maps from ciliated maps [PDF]
We solve a conjecture from the first and third authors that claims that fully simple maps, which are maps with non self-intersecting disjoint boundaries, satisfy topological recursion for the exchanged spectral curve \((y, x)\), making use of the ...
Garcia-Failde, Elba +5 more
core +1 more source
Some collapsibility results for n-dimensional contingency tables
Collapsibility, Conditional independence, Contingency table, Log-linear model, Möbius inversion, Simpson’s paradox, Strict collapsibility, Primary 62H17, Secondary 62E99, Secondary 05A05,
P. Vellaisamy, V. Vijay
core +1 more source