Results 31 to 40 of about 5,202 (129)
Du mode d’inexistence des mathématiques
Appareil, 2016 On ne trouve aucune formulation du statut ontologique des mathématiques dans l’œuvre de Gilbert Simondon. Cela tient, selon nous, à ce qu’on ne peut attribuer un mode d’existence aux mathématiques dans l’horizon de sa philosophie de la nature : si ...
Vincent Bontems
doaj +1 more source
The Journal of Physiology, EarlyView.Abstract figure legend Activation time (AT) maps from right ventricular apical pacing in a human ventricles model with longer action potential duration in the His‐Purkinje system (HPS) than in the myocardium (MYO). For pacing with a long S1S2 coupling interval (CI), the AT from the myocardial pacing site to the first AT of the HPS (ATMYO) is longer ...
Jason D. Bayer +3 more
wiley +1 more source
Les évaluations des performances en mathématiques sont-elles influencées par le sexe de l’élève ?
Mesure et Évaluation en Éducation, 2009 Cet article comporte deux études complémentaires visant à explorer si le sexe de l’étudiant influence le jugement des enseignants en mathématiques. La première étude, expérimentale, a porté sur 48 enseignants de mathématiques (secondaire supérieur). Ceux-
Dominique Lafontaine, Christian Monseur
doaj +1 more source
Context‐free graphs and their transition groups
Transactions of the London Mathematical Society, Volume 13, Issue 1, December 2026.Abstract Starting from context‐free inverse graphs, we introduce a new class of groups and study their structural properties. We establish closure properties, show that their coword problems are context‐free, analyze torsion elements, and realize them as subgroups of the asynchronous rational group.
Daniele D'Angeli +3 more
wiley +1 more source
Apprentissage mathématique et test de closure
Revue des Sciences Humaines, 2005 Les résultats obtenus à l’épreuve de mathématiques aux examens du BEF et BAC en Juin 2004 au niveau de la wilaya de Constantine indiquent que l’enseignement des mathématiques dans nos établissements scolaires est confronté à de grosses difficultés ...
Mouloud ABDELLI
doaj
Stochastic Gradient Descent in High Dimensions for Multi‐Spiked Tensor PCA
Communications on Pure and Applied Mathematics, Volume 79, Issue 10, Page 2291-2369, October 2026.ABSTRACT We study the high‐dimensional dynamics of online stochastic gradient descent (SGD) for the multi‐spiked tensor model. This multi‐index model arises from the tensor principal component analysis (PCA) problem with multiple spikes, where the goal is to estimate the unknown signal vectors within the N$N$‐dimensional unit sphere through maximum ...
Gérard Ben Arous +2 more
wiley +1 more source
Numerical Linear Algebra with Applications, Volume 33, Issue 5, October 2026.ABSTRACT Vector extrapolation techniques can be highly effective when used to accelerate the convergence of fixed‐point iterative methods, such as the Picard method. In this study, we investigate the numerical solution of nonlinear problems. Specifically, we address the nonlinear eigenvalue Bratu problem and the Monge–Ampère equation using a multigrid ...
Abdellatif Mouhssine +2 more
wiley +1 more source
Dam Management in the Era of Climate Change
Mathematical Finance, Volume 36, Issue 4, Page 870-895, October 2026.ABSTRACT Climate change has a dramatic impact, particularly by concentrating rainfall into a few short periods, interspersed with long dry spells. In this context, the role of dams is crucial. We consider the optimal control of a dam, where the water level must neither exceed a designated safety threshold nor fall below a minimum level to ensure ...
Cristina Di Girolami +3 more
wiley +1 more source
New Phytologist, Volume 252, Issue 2, Page 926-935, October 2026.Tip Quantification enables quantitative analyses over versatile selections of regions of interest. Summary Cell polarity and tip growth rely on the dynamic spatial organization of signaling and structural components. Quantitative characterization of these spatiotemporal dynamics is critical for understanding polarized cell growth, yet manual ...
Jingzhe Guo +7 more
wiley +1 more source
Bounded exponential sums with multiplicative coefficients
Mathematika, Volume 72, Issue 4, October 2026.Abstract We investigate when the exponential sum Sf(x,α):=∑n⩽xf(n)e(nα)$S_f(x,\alpha) := \sum _{n\leqslant x}f(n)\mathrm{e}(n\alpha)$ is bounded, for a multiplicative function f$f$ and α∈R$\alpha \in \mathbb {R}$. We show that under natural assumptions, Sf(x,α)$S_f(x,\alpha)$ is bounded only when f$f$ is very close to a twisted Dirichlet character χ(n ...
Péa Bazin, Ihor Pylaiev, Fred Tyrrell
wiley +1 more source