Results 51 to 60 of about 1,087,957 (214)
Paradoxical Topological Soliton Lattice in Anisotropic Frustrated Chiral Magnets
Advanced Science, Volume 13, Issue 5, 27 January 2026.The article describes the discovery of a stable skyrmion‐antiskyrmion lattice (S‐AL) in anisotropic frustrated chiral magnets. This lattice has a net‐zero topological charge due to a balanced population of skyrmions and antiskyrmions. This is a paradoxical finding since these particles normally annihilate each other.
Sayan Banik +2 more
wiley +1 more source
Homotopy properties of endpoint maps and a theorem of Serre in subriemannian geometry [PDF]
, 2015 We discuss homotopy properties of endpoint maps for affine control systems. We prove that these maps are Hurewicz fibrations with respect to some $W^{1,p}$ topology on the space of trajectories, for a certain $p>1$.
Boarotto, Francesco, Lerario, Antonio
core
The geometric Hopf invariant and double points
, 2010 The geometric Hopf invariant of a stable map F is a stable Z_2-equivariant map h(F) such that the stable Z_2-equivariant homotopy class of h(F) is the primary obstruction to F being homotopic to an unstable map.
Crabb, Michael, Ranicki, Andrew
core +3 more sources
The homotopy method revisited: Computing solution paths of $\ell _1$-regularized problems [PDF]
Mathematics of Computation, 2017 19 pages, 4 ...
Bringmann, Bjoern +3 more
openaire +2 more sources
Heat Transfer, Volume 55, Issue 1, Page 764-774, January 2026.ABSTRACT This review explores the impact of gravitational instability on convective heat transfer, integrating existing research results and theoretical models. Gravitational instability is vital in promoting or hindering convective actions in different systems, such as atmospheric events, ocean currents, and industrial processes.
Hossam A. Nabwey +3 more
wiley +1 more source
On the Wu invariants for immersions of a graph into the plane
, 2010 We give an explicit calculation of the Wu invariants for immersions of a finite graph into the plane and classify all generic immersions of a graph into the plane up to regular homotopy by the Wu invariant.
Nikkuni, Ryo
core +2 more sources
Homotopy in Q-polynomial distance-regular graphs
Discrete Mathematics, 2000 A connected graph \(\Gamma= (X,R)\) with diameter \(d\geq 1\) is called distance-regular if for all integers \(h\), \(i\), \(j\) such that \(0\leq h\), \(i,j\leq d\), and for all \(x,y\in X\) with \(\partial(x,y)= h\) the number \(p^h_{ij}= |\{z\in X\mid\partial(x, z)= i\text{ and }\partial(y,z)= j\}|\) depends only on \(h\), \(i\), \(j\) and not on ...
openaire +2 more sources
Families of singular algebraic varieties that are rationally elliptic spaces
Mathematische Nachrichten, Volume 299, Issue 1, Page 214-223, January 2026.Abstract We discuss families of hypersurfaces with isolated singularities in projective space with the property that the sum of the ranks of the rational homotopy and the homology groups is finite. They represent infinitely many distinct homotopy types with all hypersurfaces having a nef canonical or anti‐canonical class.
A. Libgober
wiley +1 more source
Optimal Control Applications and Methods, Volume 47, Issue 1, Page 4-23, January/February 2026.ABSTRACT High‐level decision‐making for dynamical systems often involves performance and safety specifications that are activated or deactivated depending on conditions related to the system state and commands. Such decision‐making problems can be naturally formulated as optimization problems where these conditional activations are regulated by ...
Andrea Ghezzi +4 more
wiley +1 more source