Results 71 to 80 of about 1,445,474 (283)

Prolongations of tensor fields and connections to tangent bundles I -- General theory -- [PDF]

Journal of the Mathematical Society of Japan, 1966
Publisher Summary Using the notion of complete lift it is shown that G structures as a pseudo-Riemannian structure, an almost complex structure and a symplectic structure on M induce similar structures on the tangent bundle T(M). An unexpected but perhaps more interesting result is that each pseudo-Riemannian (resp.
YANO, Kentaro, KOBAYASHI, Shoshichi
openaire   +3 more sources

Some aspects of noncommutative differential geometry [PDF]

, 1995
We discuss in some generality aspects of noncommutative differential geometry associated with reality conditions and with differential calculi. We then describe the differential calculus based on derivations as generalization of vector fields, and we ...
Dubois-Violette, Michel
core  

Multi‐omics and low‐input proteomics profiling reveals dynamic regulation driving pluripotency initiation in early mouse embryos

FEBS Open Bio, EarlyView.
Mouse pre‐implantation development involves a transition from totipotency to pluripotency. Integrating transcriptomics, epigenetic profiling, low‐input proteomics and functional assays, we show that eight‐cell embryos retain residual totipotency features, whereas cytoskeletal remodeling regulated by the ubiquitin‐proteasome system drives progression ...
Wanqiong Li, Xi Xiao, Lingbin Qi, Chanyi Li, Sirui Song, Jiaying Qin, Zhigang Xue, Jinfeng Xue, Huaifang Li   +8 more
wiley   +1 more source

Micropolar Modeling of Shear Wave Dispersion in Marine Sediments and Deep Earth Materials: Deriving Scaling Laws

Geosciences
We draw connections between eight different theories used to describe microscopic (atomic) and macroscopic (seismological) scales. In particular, we show that all these different theories belong to a particular case of a single partial differential ...
Rafael Abreu
doaj   +1 more source

Information and Physics

Information, 2012
In this paper I discuss the question: what comes first, physics or information? The two have had a long-standing, symbiotic relationship for almost a hundred years out of which we have learnt a great deal.
Vlatko Vedral
doaj   +1 more source

Bundle geometry of the connection space, covariant Hamiltonian formalism, the problem of boundaries in gauge theories, and the dressing field method

Journal of High Energy Physics, 2021
We take advantage of the principal bundle geometry of the space of connections to obtain general results on the presymplectic structure of two classes of (pure) gauge theories: invariant theories, and non-invariant theories satisfying two restricting ...
J. François
doaj   +1 more source

Functional Connectivity Linked to Cognitive Recovery After Minor Stroke

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Patients with minor stroke exhibit slowed processing speed and generalized alterations in functional connectivity involving frontoparietal cortex (FPC). The pattern of connectivity evolves over time. In this study, we examine the relationship of functional connectivity patterns to cognitive performance, to determine ...
Vrishab Commuri, Isabella Dallasta, Ciaran Stone, Sophia Girgenti, Neda Gould, Rafael H. Llinas, Jonathan Z. Simon, Elisabeth Breese Marsh   +7 more
wiley   +1 more source

Projective module description of the q-monopole

, 1998
The Dirac q-monopole connection is used to compute projector matrices of quantum Hopf line bundles for arbitrary winding number. The Chern-Connes pairing of cyclic cohomology and K-theory is computed for the winding number -1.
Hajac, P. M., Majid, S.
core   +2 more sources

Lessons Learned From a Delayed‐Start Trial of Modafinil for Freezing of Gait in Parkinson's Disease

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Freezing of gait (FOG) in people with Parkinson's disease (PwPD) is debilitating and has limited treatments. Modafinil modulates beta/gamma band activity in the pedunculopontine nucleus (PPN), like PPN deep brain stimulation. We therefore tested the hypothesis that Modafinil would improve FOG in PwPD.
Tuhin Virmani, Lakshmi Pillai, Reid D. Landes, Aliyah Glover, Shannon Doerhoff, Jennifer Kleiner, Mitesh Lotia, Rohit Dhall, Edgar Garcia‐Rill   +8 more
wiley   +1 more source

Isoperimetric Inequalities in Simplicial Complexes

, 2013
In graph theory there are intimate connections between the expansion properties of a graph and the spectrum of its Laplacian. In this paper we define a notion of combinatorial expansion for simplicial complexes of general dimension, and prove that ...
A. Duval, A. Gundert, A. Gundert, A. Lubotzky, A. Lubotzky, A. Lubotzky, A. Marcus, A. Nilli, A. Żuk, B. Eckmann, D. Dotterrer, D. Puder, D. W. Matula, F. Chung, F. R. K. Chung, H. Garland, I. Newman, J. Cheeger, J. Dodziuk, J. Fox, J. Friedman, J. Friedman, J. Friedman, J. Matoušsek, J. Pach, J. Steenbergen, M. Blum, N. Alon, N. Alon, N. Alon, N. Linial, O. Parzanchevski, Ori Parzanchevski, P. Buser, P. Erdős, P. Erdős, R. Aharoni, R. Beigel, R. I. Oliveira, R. M. Tanner, R. Meshulam, Ran J. Tessler, Ron Rosenthal, S. Hoory, S. Janson, T. Tao, W. Kook, Y. Bilu   +47 more
core   +1 more source