Results 81 to 90 of about 3,137 (142)
Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 3, Page 271-281, September 2025.ABSTRACT Objective To evaluate the impact of endometrial thickness on the reproductive outcomes of embryo transfer (ET) treatments using both cut‐off‐based meta‐analysis and meta‐analysis of proportions. Methods This was a systematic review and meta‐analysis of comparative studies (randomized controlled trials, cohort studies, case–control studies) and
F. Pérez‐Milán +10 more
wiley +1 more source
Identities arising from higher-order Daehee polynomial bases
Open Mathematics, 2015 Here we will derive formulas for expressing any polynomial as linear combinations of two kinds of higherorder Daehee polynomial basis. Then we will apply these formulas to certain polynomials in order to get new and interesting identities involving ...
Kim Dae San, Kim Taekyun
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External validation of QUiPP App in three independent European cohorts of symptomatic women
Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 2, Page 163-174, August 2025.ABSTRACT Objective To validate externally the QUantitative Innovation in Predicting Preterm birth (QUiPP) App v.2 for the prediction of spontaneous preterm birth (sPTB) in symptomatic women attending tertiary care in Europe. Methods The QUiPP App v.2 was validated in three independent datasets: a prospective European multicenter cohort across five ...
A. M. Fischer +8 more
wiley +1 more source
Umbral Interpolation: A Survey
MathematicsA survey on recent umbral polynomial interpolation is presented. Some new results are given, following a matrix-determinant approach. Some theoretical and numerical examples are provided.
Francesco Aldo Costabile +2 more
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The Response of the Thermosphere to the 26 December 2019 Solar Eclipse
Geophysical Research Letters, Volume 52, Issue 14, 28 July 2025.Abstract This study investigates thermospheric response to the 2019 solar eclipse, focusing on temperature and neutral mass density variations at Wuhan and Beijing. The method proposed by Li et al. (2023, https://doi.org/10.1029/2022ja030988) to derive thermospheric parameters from electron density profiles was employed.
Shaoyang Li +5 more
wiley +1 more source
A new discretization of the Euler equation via the finite operator theory [PDF]
Open Communications in Nonlinear Mathematical PhysicsWe propose a novel discretization procedure for the classical Euler equation, based on the theory of Galois differential algebras and the finite operator calculus developed by G.C. Rota and collaborators.
Miguel A. Rodríguez +1 more
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Approximation operators constructed by means of Sheffer sequences
Journal of Numerical Analysis and Approximation Theory, 2001 In this paper we introduce a class of positive linear operators by using the "umbral calculus", and we study some approximation properties of it. Let \( Q \) be a delta operator, and \(S\) an invertible shift invariant operator. For \(f\in C[0,1]\) we
Maria Crăciun
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Some comments on Rota's Umbral Calculus
Journal of Mathematical Analysis and Applications, 1980 AbstractRota's Umbral Calculus is put in the context of general Fourier analysis. Also, some shortcuts in the proofs are illustrated and a new characterization of sequences of binomial type is given. Finally it is shown that there are few (classical) orthogonal polynomials of binomial type.
openaire +1 more source
Ultrametric umbral calculus in characteristic $p$
Bulletin of the Belgian Mathematical Society - Simon Stevin, 2007 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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