Results 121 to 130 of about 1,998,384 (219)

A practical guide to characterising ecological coexistence

Biological Reviews, Volume 101, Issue 1, Page 195-220, February 2026.
ABSTRACT Coexistence is simultaneously one of the most fundamental concepts of ecology, and one of the most difficult to define. A particular challenge is that, despite a well‐developed body of research, several different schools of thought have developed over the past century, leading to multiple independent, and largely isolated, branches of ...
Adam T. Clark, Lauren G. Shoemaker, Jean‐François Arnoldi, György Barabás, Rachel Germain, Oscar Godoy, Lauren Hallett, Canan Karakoç, Serguei Saavedra, Sebastian J. Schreiber   +9 more
wiley   +1 more source

Witten genera of complete intersections

Bulletin of the London Mathematical Society, Volume 58, Issue 2, February 2026.
Abstract We prove vanishing results for Witten genera of string generalized complete intersections in homogeneous Spinc$\text{Spin}^c$‐manifolds and in other Spinc$\text{Spin}^c$‐manifolds with Lie group actions. By applying these results to Fano manifolds with second Betti number equal to one we get new evidence for a conjecture of Stolz.
Michael Wiemeler
wiley   +1 more source

Sobolev and quasiconformal distortion of intermediate dimension with applications to conformal dimension

Journal of the London Mathematical Society, Volume 113, Issue 2, February 2026.
Abstract We study the distortion of intermediate dimension under supercritical Sobolev mappings and also under quasiconformal or quasisymmetric homeomorphisms. In particular, we extend to the setting of intermediate dimensions both the Gehring–Väisälä theorem on dilatation‐dependent quasiconformal distortion of dimension and Kovalev's theorem on the ...
Jonathan M. Fraser, Jeremy T. Tyson
wiley   +1 more source

Residue curve maps of 4-component systems. Poincare index determination for 4-component azeotrope

Тонкие химические технологии, 2011
A method of Poincare index determination for a singular point corresponding to a 4-component azeotrope is proposed. The method is based on the equation of azeotropic relationship.
L. A. Serafimov, A. V. Frolkova, D. V. Medvedev, G. A. Semin   +3 more
doaj  

The phase portrait of the Hamiltonian system associated to a Pinchuk map

Anais da Academia Brasileira de Ciências
In this paper we describe the global phase portrait of the Hamiltonian system associated to a Pinchuk map in the Poincaré disc. In particular, we prove that this phase portrait has 15 separatrices, five of them singular points, and 7 canonical regions ...
JOAN CARLES ARTÉS, FRANCISCO BRAUN, JAUME LLIBRE   +2 more
doaj   +1 more source

The cosymplectic Chern–Hamilton conjecture

Journal of the London Mathematical Society, Volume 113, Issue 2, February 2026.
Abstract In this paper, we study the Chern–Hamilton energy functional on compact cosymplectic manifolds, fully classifying in dimension 3 those manifolds admitting a critical compatible metric for this functional. This is the case if and only if either the manifold is co‐Kähler or if it is a mapping torus of the 2‐torus by a hyperbolic toral ...
Søren Dyhr, Ángel González‐Prieto, Eva Miranda, Daniel Peralta‐Salas   +3 more
wiley   +1 more source

Boundary spike‐layer solutions of the multi‐dimensional singular Keller–Segel system: Existence, profiles and stability

Proceedings of the London Mathematical Society, Volume 132, Issue 2, February 2026.
Abstract This paper investigates boundary‐layer solutions of the singular Keller–Segel system (proposed in Keller and Segel [J. Theor. Biol. 30 (1971), 377–380]) in multi‐dimensional domains, which describes cells' chemotactic movement toward the concentration gradient of the nutrient they consume, subject to a zero‐flux boundary condition for the cell
Jose A. Carrillo, Jingyu Li, Zhi‐An Wang, Wen Yang   +3 more
wiley   +1 more source

Heart rate variability changes in adolescents following surgical correction of aortic coarctation: Persistent autonomic alterations

Physiological Reports, Volume 14, Issue 3, February 2026.
Abstract Heart rate variability (HRV) is a sensitive marker of autonomic regulation. This study examined adolescents in the long‐term postoperative period after early surgical correction of aortic coarctation (CoA) compared with age‐matched healthy peers. Seventy adolescents (35 CoA, 35 controls; 12–17 years) underwent 5‐min resting ECG and respiratory
O. V. Shevaldova, A. V. Kovaleva, A. Yu. Zavarina, E. N. Likhomanova, E. N. Panova, O. B. Obryvchenko   +5 more
wiley   +1 more source

The Deep Poincaré Map: A Novel Approach for Left Ventricle Segmentation

International Conference on Medical Image Computing and Computer-Assisted Intervention, 2017
Yuanhan Mo, Fangde Liu, D. McIlwraith, Guang Yang, Jingqing Zhang, T. He, Yike Guo   +6 more
semanticscholar   +1 more source

Numerical Analysis of a Benjamin–Bona–Mahony Type Equation in a Noncylindrical Domain

Mathematical Methods in the Applied Sciences, Volume 49, Issue 2, Page 818-834, 30 January 2026.
ABSTRACT Numerical analysis and simulation for the approximate solution of a Benjamin–Bona–Mahony type equation defined in a noncylindrical domain are presented in this article. The approximate problem is defined using the linearized Crank–Nicolson Galerkin method, which results in a linear algebraic system at each time step while maintaining quadratic
Vania Cristina Machado, Bruno Alves do Carmo, Mauro Antonio Rincon   +2 more
wiley   +1 more source