Results 11 to 20 of about 125,178 (224)
Second-Order-Optimal Minimum-Energy Filters on Lie Groups
IEEE Transactions on Automatic Control, 2016 Systems on Lie groups naturally appear as models for physical systems with full symmetry. We consider the state estimation problem for such systems where both input and output measurements are corrupted by unknown disturbances.
A. Saccon +3 more
semanticscholar +1 more source
HARD LEFSCHETZ ACTIONS IN RIEMANNIAN GEOMETRY WITH SPECIAL HOLONOMY [PDF]
, 2008 It is known that the hard Lefschetz action, together with K\"ahler identities for K\"ahler (resp. hyperk\"ahler) manifolds, determines a $\mathfrak{su}(1,1)_{sup}$ (resp. $\mathfrak{sp}(1,1)_{sup}$) Lie superalgebra action on differential forms.
N. Leung, Changzheng Li
semanticscholar +1 more source
Averages and the $\ell^{q,1}$-cohomology of Heisenberg groups [PDF]
, 2019 Averages are invariants defined on the $\ell^1$ cohomology of Lie groups. We prove that they vanish for abelian and Heisenberg groups. This result completes work by other authors and allows to show that the $\ell^1$ cohomology vanishes in these ...
Pansu, Pierre, Tripaldi, Francesca
core +3 more sources
External Fields as Intrinsic Geometry [PDF]
, 2000 There is an interesting dichotomy between a space-time metric considered as external field in a flat background and the same considered as an intrinsic part of the geometry of space-time.
Madore, John +3 more
core +2 more sources
Abelian simply transitive affine groups of symplectic type [PDF]
, 2001 We construct a model space $C(\gsp(\bR^{2n}))$ for the variety of Abelian simply transitive groups of affine transformations of type ${\rm Sp}(\bR^{2n})$.
Baues, Oliver, Cortes, Vicente
core +2 more sources
Compact Riemannian Manifolds with Homogeneous Geodesics [PDF]
, 2009 A homogeneous Riemannian space $(M= G/H,g)$ is called a geodesic orbit space (shortly, GO-space) if any geodesic is an orbit of one-parameter subgroup of the isometry group $G$.
Alekseevsky, D. V., Nikonorov, Yu. G.
core +5 more sources
Geodetikus loopok Lie elmélete = Lie theory geodesic loops [PDF]
, 2007 A geodetikus loopok alapvető modellként szolgálnak a differenciálható loopok elméletében. Vizsgáljuk a geodetikusokkal kapcsolatos differenciálgeometriai struktúrákat, a tanulmányozott módszereket pedig alkalmaztuk a differenciálható loopok elméletében ...
Nagy, Péter Tibor
core
Leibniz algebroids, twistings and exceptional generalized geometry
, 2011 We investigate a class of Leibniz algebroids which are invariant under diffeomorphisms and symmetries involving collections of closed forms. Under appropriate assumptions we arrive at a classification which in particular gives a construction starting ...
Atiyah +35 more
core +1 more source
Heisenberg double versus deformed derivatives [PDF]
, 2009 A common replacement of the tangent space to a noncommutative space whose coordinate algebra is the enveloping algebra of a Lie algebra is generated by the deformed derivatives, usually defined by procedures involving orderings among noncommutative ...
Zoran vSkoda
semanticscholar +1 more source
X‐Ray Tomography Analysis of Damage Mechanisms in Metal Matrix Syntactic Foams During Compression
Advanced Engineering Materials, EarlyView.In situ synchrotron X‐ray tomography is used to investigate the internal damage mechanisms of AlSi12 metal matrix syntactic foam with ceramic hollow spheres during compressive loading. It is concluded that a homogeneous distribution of the second‐phase filler material results in a sequential collapse in a localized region; this leads to controlled and ...
Indrajeet Tambe +8 more
wiley +1 more source