Results 21 to 30 of about 612 (176)

Almost Sharp Bounds on the Number of Discrete Chains in the Plane [PDF]

open access: yes, 2022
The following generalisation of the Erdős Unit Distance problem was recently suggested by Palsson, Senger, and Sheffer. For a fixed sequence δ = (δ1, …, δk) of k distances, a (k + 1)-tuple (p1, …, pk+1) of distinct points in ℝd is called a k-chain if ∥pj
Kupavskii, Andrey, Frankl, Nóra
core   +1 more source

Differential Equation and Recursive Formulas of Sheffer Polynomial Sequences [PDF]

open access: yesISRN Discrete Mathematics, 2011
We derive a differential equation and recursive formulas of Sheffer polynomial sequences utilizing matrix algebra. These formulas provide the defining characteristics of, and the means to compute, the Sheffer polynomial sequences. The tools we use are well-known Pascal functional and Wronskian matrices.
Youn, Heekyung, Yang, Yongzhi
openaire   +2 more sources

An infinite dimensional umbral calculus [PDF]

open access: yes, 2019
The aim of this paper is to develop foundations of umbral calculus on the space $\mathcal D'$ of distributions on $\mathbb R^d$, which leads to a general theory of Sheffer polynomial sequences on $\mathcal D'$.
Finkelshtein, Dmitri   +7 more
core   +1 more source

Multilocus sequence typing as a replacement for serotyping in Salmonella enterica [PDF]

open access: yes, 2012
Salmonella enterica subspecies enterica is traditionally subdivided into serovars by serological and nutritional characteristics. We used Multilocus Sequence Typing (MLST) to assign 4,257 isolates from 554 serovars to 1092 sequence types (STs).
Uesbeck, Alexandra   +88 more
core   +1 more source

On multivariable Sheffer sequences

open access: yesJournal of Mathematical Analysis and Applications, 1979
Let {Bn(x)}~=,, be a polynomial sequence which is simple, one where each B,(x) is of degree precisely 71.
openaire   +3 more sources

Linear Recurrences Under Side Conditions [PDF]

open access: yes, 1980
A linear recurrence is a linear operator which maps rn into rn-1, where (rn) is a (recursive) sequence of functions. If the kernel of this operator consists only of constant functions, uniqueness and representation theorems of (rn) can be stated for the ...
Niederhausen, Heinrich
core   +1 more source

A cluster of mutations within a short triplet repeat in the C1 inhibitor gene [PDF]

open access: yes, 1994
Mutations in the C1 inhibitor gene that result in low functional levels of C1 inhibitor protein cause hereditary angioneurotic edema. This disease is characterized by episodic edema leading to considerable morbidity and death. Among 60 unreported kindred
A. L. Sheffer   +6 more
core   +1 more source

Product of Sheffer sequences: properties and examples

open access: yesTbilisi Mathematical Journal, 2019
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Riyasat, Mumtaz   +2 more
openaire   +2 more sources

TABI: Tight and Balanced Interactive Atlas Packing

open access: yesComputer Graphics Forum, EarlyView.
Abstract Atlas packing is a key step in many computer graphics applications. Packing algorithms seek to arrange a set of charts within a fixed‐size atlas with as little downscaling as possible. Many packing applications such as content creation tools, dynamic atlas generation for video games, and texture space shading require on‐the‐fly interactive ...
F. Gu, N. Vining, A. Sheffer
wiley   +1 more source

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