Results 41 to 50 of about 3,946,822 (379)

Vitamin D, magnesium, calcium, and their interaction in relation to colorectal cancer recurrence and all-cause mortality

open access: yesAmerican Journal of Clinical Nutrition, 2020
Background Higher concentrations of 25-hydroxyvitamin D3 [25(OH)D3] at diagnosis are associated with a lower mortality risk in colorectal cancer (CRC) patients. However, magnesium and calcium are important in vitamin D metabolism.
E. Wesselink   +13 more
semanticscholar   +1 more source

Recurrence Relations for Moments of Dual Generalized Order Statistics from Weibull Gamma Distribution and Its Characterizations [PDF]

open access: yes, 2014
In this paper, we establish explicit forms and new recurrence relations satisfied by the single and product moments of dual generalized order statistics from Weibull gamma distribution (WGD).
Abdel-Aty, Y.   +3 more
core   +2 more sources

Asymptotic series solution of variational stokes problems in planar domain with crack-like singularity

open access: yesApplied Mathematics in Science and Engineering, 2022
A class of nonlinear variational problems describing incompressible fluids and solids by stationary Stokes equations given in a planar domain with a crack (infinitely thin flat plate in fluids) is considered.
Victor A. Kovtunenko, Kohji Ohtsuka
doaj   +1 more source

Orthogonal polynomials of dimension –1 in the non-definite case [PDF]

open access: yesRendiconti di Matematica e delle Sue Applicazioni, 1994
: Orthogonal polynomials of dimension d = −1 are a particular case of vector orthogonal polynomials which are, themselves, a particular case of biorthogonal polynomials.
C. BREZINSKI , M. REDIVO-ZAGLIA
doaj  

Number of spanning trees of some families of graphs generated by a triangle

open access: yesJournal of Taibah University for Science, 2019
In mathematics, one always tries to get new structures from given ones. This also applies to the realm of graphs, where one can generate many new graphs from a given set of graphs.
S. N. Daoud
doaj   +1 more source

On fourth-order jacobsthal quaternions

open access: yesJournal of Mathematical Sciences and Modelling, 2018
In this paper, we present for the first time a sequence of quaternions of order 4 that we will call the fourth-order Jacobsthal and the fourth-order Jacobsthal-Lucas quaternions. In particular, we are interested in the generating function, Binet formula,
Gamaliel Cerda-morales
doaj   +1 more source

Probabilistic recurrence relations revisited

open access: yesTheoretical Computer Science, 1995
AbstractThe performance attributes of a broad class of randomised algorithms can be described by a recurrence relation of the form T(x) = a(x) + T(H(x)), where a is a function and H(x) is a random variable. For instance, T(x) may describe the running time of such an algorithm on a problem of size x.
Chaudhuri, S., Dubhashi, D.
openaire   +5 more sources

Special formulas involving polygonal numbers and Horadam numbers

open access: yesKarpatsʹkì Matematičnì Publìkacìï, 2021
Some convolution-type identities involving polygonal numbers and Horadam numbers are derived. The method of proof is to properly relate the generating functions to each other.
K. Adegoke, R. Frontczak, T. Goy
doaj   +1 more source

Two Nice Determinantal Expressions and A Recurrence Relation for the Apostol--Bernoulli Polynomials

open access: yes, 2017
In the paper, the authors establish two nice determinantal expressions and a recurrence relation for the Apostol--Bernoulli polynomials.
Feng Qi (祁锋), Bai-Ni Guo (郭白妮)
semanticscholar   +1 more source

Fast calculation of computer-generated hologram using run-length encoding based recurrence relation.

open access: yesOptics Express, 2015
Computer-Generated Holograms (CGHs) can be generated by superimposing zoneplates. A zoneplate is a grating that can concentrate an incident light into a point.
Takashi Nishitsuji   +3 more
semanticscholar   +1 more source

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