Results 11 to 20 of about 3,955 (121)

EACR 2025 Congress: Innovative Cancer Science, 16-19 June 2025. [PDF]

Mol Oncol
Abstracts submitted to the ‘EACR 2025 Congress: Innovative Cancer Science’, from 16–19 June 2025 and accepted by the Congress Organising Committee are published in this Supplement of Molecular Oncology, an affiliated journal of the European Association for Cancer Research (EACR).
europepmc   +2 more sources

The inflationary bispectrum with curved field-space [PDF]

, 2012
We compute the covariant three-point function near horizon-crossing for a system of slowly-rolling scalar fields during an inflationary epoch, allowing for an arbitrary field-space metric.
A. Achucarro, A. Avgoustidis ., A. Mazumdar, A.A. Starobinsky, A.A. Starobinsky, C. Burgess, C. Burrage, C. Cheung, C.M. Peterson, D. Seery, D. Seery, D. Seery, D. Seery, D. Seery, D. Seery, D. Seery, D. Seery, D. Seery, D.H. Lyth, D.H. Lyth, D.I. Kaiser, D.J. Mulryne, D.J. Mulryne, David Seery, E. Nalson, E. Poisson, E.E. Flanagan, F. Arroja, F. Arroja, F. Vernizzi, G.J. Anderson, I. Buchbinder, J. Elliston, J. White, J.-O. Gong, J.-O. Gong, J.M. Maldacena, Joseph Elliston, K. Koyama, L. McAllister, P.M. Saffin, R.L. Arnowitt, Reza Tavakol, S. Renaux-Petel, S. Yokoyama, T. Appelquist, T. Chiba, X. Chen, X. Chen, X. Chen, X. Gao   +50 more
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η-Ricci Solitons on Sasakian 3-Manifolds

Annals of the West University of Timisoara: Mathematics and Computer Science, 2017
In this paper we study η-Ricci solitons on Sasakian 3-manifolds. Among others we prove that an η-Ricci soliton on a Sasakian 3-manifold is an η-Einstien manifold.
Majhi Pradip, De Uday Chand, Kar Debabrata   +2 more
doaj   +1 more source

Natural Connection with Totally Skew-Symmetric Torsion on Riemannian Almost Product Manifolds [PDF]

, 2011
On a Riemannian almost product manifold $(M,P,g)$ we consider a linear connection preserving the almost product structure $P$ and the Riemannian metric $g$ and having a totally skew-symmetric torsion.
DIMITAR MEKEROV, Gauduchon P., Gray A., Helgason S., Lichnerowicz A., Lichnerowicz A., MANCHO MANEV, Mekerov D., Mihova V., Staikova M., Staikova M., Yano K.   +11 more
core   +1 more source

Study of Kenmotsu manifolds with semi-symmetric metric connection

Universal Journal of Mathematics and Applications, 2018
The present paper deals with the study of Kenmotsu manifolds equipped with a semi-symmetric metric connection. The properties of $\eta-$parallel Ricci tensor, globally symmetric and $\phi-$symmetric Kenmotsu manifolds with the semi-symmetric metric ...
Sudhakar Chaubey, Sunil Kr Yadav
doaj   +1 more source

On the relation between the Einstein field equations and the Jacobi–Ricci–Bianchi system [PDF]

, 2013
The 1 + 3 covariant equations, embedded in an extended tetrad formalism and describing a spacetime with an arbitrary energy–momentum distribution, are reconsidered.
Van den Bergh, Norbert
core   +2 more sources

η-Ricci Solitons on Quasi-Sasakian Manifolds

Annals of the West University of Timisoara: Mathematics and Computer Science, 2018
The object of the present paper is to study η-Ricci solitons in a 3-dimensional non-cosymplectic quasi-Sasakian manifolds. We study a particular type of second order parallel tensor in this manifold.
Ghosh Sujit
doaj   +1 more source

Extended Derdzinski-Shen theorem for the Riemann tensor [PDF]

, 2011
We extend a classical result by Derdzinski and Shen, on the restrictions imposed on the Riemann tensor by the existence of a nontrivial Codazzi tensor. The new conditions of the theorem include Codazzi tensors (i.e.
Mantica, Carlo Alberto, Molinari, Luca Guido   +1 more
core   +2 more sources

Purely Magnetic Spacetimes [PDF]

, 1995
Purely magnetic spacetimes, in which the Riemann tensor satisfies $R_{abcd}u^bu^d=0$ for some unit timelike vector $u^a$, are studied. The algebraic consequences for the Weyl and Ricci tensors are examined in detail and consideration given to the ...
Barry M. Haddow, Misra R. M.
core   +3 more sources

Weyl's Theory in the Generalized Lie Algebroids Framework [PDF]

, 2014
The geometry of the Lie algebroid generalized tangent bundle of a generalized Lie algebroid is developed. Formulas of Ricci type and identities of Cartan and Bianchi type are presented.
Arcus, C. M., Peyghan, E., Sharahi, E.
core   +1 more source