Results 21 to 30 of about 464,650 (293)

Canards and curvature: nonsmooth approximation by pinching [PDF]

, 2011
In multiple time-scale (singularly perturbed) dynamical systems, canards are counterintuitive solutions that evolve along both attracting and repelling invariant manifolds.
Desroches, MF, M Desroches, M R Jeffrey, Jeffrey, MR   +3 more
core   +1 more source

Curvature-adapted submanifolds of bi-invariant Lie groups

, 2021
Given a hypersurface M of a Riemannian manifold Q, one says that M is curvature-adapted (to Q) if, for each p ∈M , the normal Jacobi operator and the shape operator of M commute. The first operator measures the curvature of the ambient manifold along the
Camarinha, Margarida, Raffaelli, Matteo
core   +4 more sources

The invariant rings of the Sylow groups of GU(3,q2), GU(4,q2), Sp(4,q) and O+(4,q) in the natural characteristic [PDF]

, 2016
Let G be a Sylow p -subgroup of the unitary groups GU(3,q2)GU(3,q2), GU(4,q2)GU(4,q2), the symplectic group Sp(4,q)Sp(4,q) and, for q odd, the orthogonal group O+(4,q)O+(4,q).
Fleischmann, Peter, Ferreira, Jorge N.M., Ferreira, Jorge N. M.   +2 more
core   +1 more source

Scale invariant Volkov–Akulov supergravity

Physics Letters B, 2015
A scale invariant goldstino theory coupled to supergravity is obtained as a standard supergravity dual of a rigidly scale-invariant higher-curvature supergravity with a nilpotent chiral scalar curvature.
S. Ferrara, M. Porrati, A. Sagnotti
doaj   +1 more source

Homotopy invariants and almost non-negative curvature [PDF]

Mathematische Zeitschrift, 2021
This paper explores the relation between the structure of fibre bundles akin to those associated to a closed almost nonnegatively sectionally curved manifold and rational homotopy theory.
Bazzoni, Giovanni, Lupton, Gregory, Oprea, John   +2 more
openaire   +3 more sources

Some solitons on anti-invariant submanifold of LP-Kenmotsu manifold admitting Zamkovoy connection [PDF]

Journal of Hyperstructures
In this paper we prove some curvature properties of anti-invariant submanifold of Lorentzian para-Kenmotsu manifold (briefly, LP-Kenmotsu manifolds) with respect to Zamkovoy connection (∇∗).
Abhijit Mandal, Meghlal Mallik
doaj   +1 more source

Square-integrability of solutions of the Yamabe equation [PDF]

, 2011
We show that solutions of the Yamabe equation on certain n- dimensional non-compact Riemannian manifolds which are bounded and Lp for p = 2n=(n-2) are also L2. This Lp-L2-implication provides explicit constants in the surgery-monotonicity formula for the
Humbert, Emmanuel, Ammann, Bernd, Dahl, Mattias,, Dahl, Mattias   +3 more
core   +1 more source

A basic inequality for submanifolds in a cosymplectic space form

International Journal of Mathematics and Mathematical Sciences, 2003
For submanifolds tangent to the structure vector field in cosymplectic space forms, we establish a basic inequality between the main intrinsic invariants of the submanifold, namely, its sectional curvature and scalar curvature on one side; and its main ...
Jeong-Sik Kim, Jaedong Choi
doaj   +1 more source

Quasi-Kahler Chern-flat manifolds and complex 2-step nilpotent Lie algebras [PDF]

, 2012
The study of quasi-Kaehler Chern-flat almost Hermitian manifolds is strictly related to the study of anti-bi-invariant almost complex Lie algebras.
Lauret, J., Di Scala, Antonio Jose', Vezzoni, L.   +2 more
core   +1 more source

Disformal transformation of cosmological perturbations

Physics Letters B, 2014
We investigate the gauge-invariant cosmological perturbations in the gravity and matter frames in the general scalar–tensor theory where two frames are related by the disformal transformation.
Masato Minamitsuji
doaj   +1 more source