Results 71 to 80 of about 931 (215)
Coulomb branch algebras via symplectic cohomology
Journal of Topology, Volume 19, Issue 2, June 2026.Abstract Let (M¯,ω)$(\bar{M}, \omega)$ be a compact symplectic manifold with convex boundary and c1(TM¯)=0$c_1(T\bar{M})=0$. Suppose that (M¯,ω)$(\bar{M}, \omega)$ is equipped with a convex Hamiltonian G$G$‐action for some connected, compact Lie group G$G$.
Eduardo González +2 more
wiley +1 more source
Potentially nilpotent and spectrally arbitrary even cycle sign patterns [PDF]
, 2007 An n×n sign pattern Sn is potentially nilpotent if there is a real matrix having sign pattern Sn and characteristic polynomial xn. A new family of sign patterns Cn with a cycle of every even length is introduced and shown to be potentially nilpotent by ...
Bingham, B.D. +2 more
core +1 more source
Hierarchies of Arnold Tongues Generated by High-Dimensional Nilpotent Matrices
Fractal and FractionalArnold tongues are wedge-shaped regions in parameter space associated with mode locking and synchronization phenomena in nonlinear dynamical systems.
Rasa Smidtaite +2 more
doaj +1 more source
An extended definition of Anosov representation for relatively hyperbolic groups
Journal of Topology, Volume 19, Issue 2, June 2026.Abstract We define a new family of discrete representations of relatively hyperbolic groups which unifies many existing definitions and examples of geometrically finite behavior in higher rank. The definition includes the relative Anosov representations defined by Kapovich–Leeb and Zhu, and Zhu–Zimmer, as well as holonomy representations of various ...
Theodore Weisman
wiley +1 more source
When is the numerical range of a nilpotent matrix circular? [PDF]
, 2010 The problem formulated in the title is investigated. The case of nilpotent matrices of size at most 4 allows a unitary treatment. The numerical range of a nilpotent matrix M of size at most 4 is circular if and only if the traces tr M∗M2 and tr M∗M3 are ...
Matache, Valentin +1 more
core +1 more source
The weighted∗-core-nilpotent decomposition [PDF]
, 1994 The interaction between an involution (.)∗ and the core-nilpotent decomposition of a square matrix is investigated and used to derive a weighted ∗-core-nilpotent decomposition.
Hartwig, Robert E., Robert E. Hartwig
core +1 more source
Rings whose non-units are square-nil clean [PDF]
Arab Journal of Mathematical SciencesPurposeTo describe the structure of a special sort of rings whose non-invertible elements are the sum of a nilpotent and a square-idempotent (which commute one another).
Mina Doostalizadeh +2 more
doaj +1 more source
Operator mixing in massless QCD-like theories and Poincarè–Dulac theorem
European Physical Journal C: Particles and Fields, 2022 Recently, a differential-geometric approach to operator mixing in massless QCD-like theories – that involves canonical forms, obtained by means of gauge transformations, based on the Poincarè–Dulac theorem for the system of linear differential equations ...
Matteo Becchetti, Marco Bochicchio
doaj +1 more source
Fortschritte der Physik, Volume 74, Issue 5, May 2026.ABSTRACT We provide full details of a BV formulation of N=1$\mathcal N=1$ supergravity in 10 dimensions, to all orders in fermions, built from the generalised geometry description of the theory. In contrast to standard treatments, we introduce neither the degrees of freedom corresponding to orthonormal frames for the metric nor the local Lorentz ...
Julian Kupka +2 more
wiley +1 more source
Which singular tangent bundles are isomorphic?
Journal of the London Mathematical Society, Volume 113, Issue 5, May 2026.Abstract Logarithmic and b$ b$‐tangent bundles provide a versatile framework for addressing singularities in geometry. Introduced by Deligne and Melrose, these modified bundles resolve singularities by reframing singular vector fields as well‐behaved sections of these singular bundles.
Eva Miranda, Pablo Nicolás
wiley +1 more source