Results 1 to 10 of about 577 (33)

Semidefinite bounds for nonbinary codes based on quadruples. [PDF]

Des Codes Cryptogr, 2017
For nonnegative integers $q,n,d$, let $A_q(n,d)$ denote the maximum cardinality of a code of length $n$ over an alphabet $[q]$ with $q$ letters and with minimum distance at least $d$. We consider the following upper bound on $A_q(n,d)$. For any $k$, let $
Litjens B, Polak S, Schrijver A.
europepmc   +7 more sources

A combinatorial model for the transition matrix between the Specht and $\operatorname {SL}_2$ -web bases

Forum of Mathematics, Sigma, 2023
We introduce a new class of permutations, called web permutations. Using these permutations, we provide a combinatorial interpretation for entries of the transition matrix between the Specht and $\operatorname {SL}_2$ -web bases of the irreducible
Byung-Hak Hwang, Jihyeug Jang, Jaeseong Oh   +2 more
doaj   +1 more source

Hodge-Deligne polynomials of character varieties of free abelian groups

Open Mathematics, 2021
Let FF be a finite group and XX be a complex quasi-projective FF-variety. For r∈Nr\in {\mathbb{N}}, we consider the mixed Hodge-Deligne polynomials of quotients Xr/F{X}^{r}\hspace{-0.15em}\text{/}\hspace{-0.08em}F, where FF acts diagonally, and compute ...
Florentino Carlos, Silva Jaime
doaj   +1 more source

An update on Haiman’s conjectures

Forum of Mathematics, Sigma
We revisit Haiman’s conjecture on the relations between characters of Kazdhan–Lusztig basis elements of the Hecke algebra over $S_n$ . The conjecture asserts that, for purposes of character evaluation, any Kazhdan–Lusztig basis element is reducible
Alex Corrêa Abreu, Antonio Nigro
doaj   +1 more source

Splines on Cayley graphs of the symmetric group

Forum of Mathematics, Sigma
A spline is an assignment of polynomials to the vertices of a graph whose edges are labeled by ideals, where the difference of two polynomials labeling adjacent vertices must belong to the corresponding ideal. The set of splines forms a ring. We consider
Nathan R. T. Lesnevich
doaj   +1 more source

Improved covering results for conjugacy classes of symmetric groups via hypercontractivity

Forum of Mathematics, Sigma
We study covering numbers of subsets of the symmetric group $S_n$ that exhibit closure under conjugation, known as normal sets. We show that for any $\epsilon>0$ , there exists $n_0$ such that if $n>n_0$ and A is a normal ...
Nathan Keller, Noam Lifshitz, Ohad Sheinfeld   +2 more
doaj   +1 more source

All Kronecker coefficients are reduced Kronecker coefficients

Forum of Mathematics, Pi
We settle the question of where exactly do the reduced Kronecker coefficients lie on the spectrum between the Littlewood-Richardson and Kronecker coefficients by showing that every Kronecker coefficient of the symmetric group is equal to a reduced ...
Christian Ikenmeyer, Greta Panova
doaj   +1 more source

Assessment of water resource security in karst area of Guizhou Province, China. [PDF]

Sci Rep, 2021
Liu L.
europepmc   +1 more source

Heterogeneous responses of systolic and diastolic left ventricular function to exercise in patients with heart failure and preserved ejection fraction. [PDF]

ESC Heart Fail, 2015
Kasner M, Sinning D, Lober J, Post H, Fraser AG, Pieske B, Burkhoff D, Tschöpe C.   +7 more
europepmc   +1 more source

Isolation of membrane-associated folded chromosomes from Escherichia coli: effect of protein synthesis inhibition. [PDF]

J Bacteriol, 1974
Ryder OA, Smith DW.
europepmc   +1 more source