Search
Now showing items 1-10 of 2271
Normal Forms for Polynomial Differential Systems in R-3 Having an Invariant Quadric and a Darboux Invariant
(World Scientific Publ Co Pte Ltd, 2015-01-01)
We give the normal forms of all polynomial differential systems in R-3 which have a nondegenerate or degenerate quadric as an invariant algebraic surface. We also characterize among these systems those which have a Darboux ...
Integrability and Dynamics of Quadratic Three-Dimensional Differential Systems Having an Invariant Paraboloid
(2016-07-01)
Invariant algebraic surfaces are commonly observed in differential systems arising in mathematical modeling of natural phenomena. In this paper, we study the integrability and dynamics of quadratic polynomial differential ...
Darboux invariants for planar polynomial differential systems having an invariant conic
(Springer, 2014-12-01)
We characterize all the planar polynomial differential systems with a unique invariant algebraic curve given by a real conic and having a Darboux invariant.
An approximation problem in multiplicatively invariant spaces
(American Mathematical Society, 2017-07)
Let H be Hilbert space and (Ω, m) a σ-finite measure space. Multiplicatively invariant(MI) spaces are closed subspaces of L2(Ω, H) that are invariant under point-wise multiplication byfunctions from a fixed subset of L∞(Ω). ...
The Sigma(1)-invariant For Artin Groups Of Circuit Rank 1
(WALTER DE GRUYTER GMBHBERLIN, 2015)
INVARIANT CONES FOR SEMIGROUPS IN TRANSITIVE LIE GROUPS
(Springer/plenum PublishersNew YorkEUA, 2008)
On the Sigma(2)-invariants of the generalised R. Thompson groups of type F
(Academic Press Inc Elsevier ScienceSan DiegoEUA, 2012)
Quadratic systems with invariant straight lines of total multiplicity two having Darboux invariants
(World ScientificSingapore, 2015)
In this paper, we present the global phase portraits in the Poincaré disc of the planar quadratic polynomial systems which admit invariant straight lines with total multiplicity two and Darboux invariants.
Diffeomorphism invariance and local Lorentz invariance
(Birkhauser Verlag AgBaselSuíça, 2008)
On certain homological invariant and its relation with poincaré duality pairs
(2018-01-01)
Let G be a group, S = {Si, i ∈ I} a non empty family of (not necessarily distinct) subgroups of infinite index in G and M a ℤ2 G-module. In [4] the authors defined a homological invariant E∗ (G, S, M), which is “dual” to ...