Results 11 to 20 of about 894 (54)
Isometry Lie algebras of indefinite homogeneous spaces of finite volume
Proceedings of the London Mathematical Society, Volume 119, Issue 4, Page 1115-1148, October 2019., 2019 Abstract Let g be a real finite‐dimensional Lie algebra equipped with a symmetric bilinear form ⟨·,·⟩. We assume that ⟨·,·⟩ is nil‐invariant. This means that every nilpotent operator in the smallest algebraic Lie subalgebra of endomorphisms containing the adjoint representation of g is an infinitesimal isometry for ⟨·,·⟩.
Oliver Baues +2 more
wiley +1 more source
Is laparoscopic ileocecal resection a safe option for Crohn's disease? Best evidence topic [PDF]
, 2014 A best evidence topic was constructed according to a structured protocol. The question addressed was whether laparoscopic ileocecal resection for Crohn's disease is associated with higher morbidity rates in comparison to open surgery. From a total of 123
Antoniou, George A. +4 more
core +1 more source
Some relations between Hodge numbers and invariant complex structures on compact nilmanifolds
Complex Manifolds, 2017 Let N be a simply connected real nilpotent Lie group, n its Lie algebra, and € a lattice in N. If a left-invariant complex structure on N is Γ-rational, then HƏ̄s,t(Γ/N) ≃ HƏ̄s,t(nC) for each s; t.
Yamada Takumi
doaj +1 more source
On generalized G2-structures and T-duality [PDF]
, 2018 This is a short note on generalized G2-structures obtained as a consequence of a T-dual construction given in del Barco et al. (2017). Given classical G2-structure on certain seven dimensional manifolds, either closed or co-closed, we obtain integrable ...
del Barco, Viviana Jorgelina +1 more
core +1 more source
Ricci-flat and Einstein pseudoriemannian nilmanifolds
Complex Manifolds, 2019 This is partly an expository paper, where the authors’ work on pseudoriemannian Einstein metrics on nilpotent Lie groups is reviewed. A new criterion is given for the existence of a diagonal Einstein metric on a nice nilpotent Lie group.
Conti Diego, Rossi Federico A.
doaj +1 more source
Examples of Anosov diffeomorphisms [PDF]
, 2002 We give a simple procedure to construct explicit examples of nilmanifolds admitting an Anosov diffeomorphism, and show that a reasonable classification up to homeomorphism (or even up to commensurability) of such nilmanifolds would not be possible ...
Lauret, Jorge
core +2 more sources
Is it safe to implant bioresorbable scaffolds in ostial side-branch lesions? Impact of 'neo-carina' formation on main-branch flow pattern. Longitudinal clinical observations [PDF]
, 2015 Formation of a 'neo-carina' has been reported after bioresorbable vascular scaffolds (BVS) implantation over side-branches. However, as this 'neo-carina' could protrude into the main-branch, its hemodynamic impact remains unknown. We present two cases of
Geuns, R.J.M. (Robert Jan) van +6 more
core +3 more sources
Analysis and Geometry in Metric Spaces, 2018 Carnot groups are distinguished spaces that are rich of structure: they are those Lie groups equipped with a path distance that is invariant by left-translations of the group and admit automorphisms that are dilations with respect to the distance.
Le Donne Enrico
doaj +1 more source
Spectral multipliers on Lie groups of polynomial growth
, 1994 Let L be a left invariant sub-Laplacian on a connected Lie group G of polynomial volume growth, and let {EA, )A*> O} be the spectral resolution of L and m a bounded Borel measurable function on [0, oo) .
G. Alexopoulos, M. Ash
semanticscholar +1 more source
, 1974 It is proved in this paper that for a given simply connected Lie group G with Lie algebra g, every left-invariant closed 2-form induces a symplectic homogeneous space.
Bon Yao Chu
semanticscholar +1 more source