Results 41 to 50 of about 863,410 (369)

Depiction of Space-Time Ontological Geometry Based on Mulla Sadra and Einstein’s Epistemological Bases [PDF]

Journal of Philosophical Investigations
The purpose of this article is to explain the quality of creation and examine the essence of space-time based on Sadra'i philosophy and its comparison with physical propositions. The present descriptive-analytical article explores two issues. One is from
Meysam Mozaka, Mahdi Dehbashi, Mohammad-Reza Shamshiri   +2 more
doaj   +1 more source

The Chevreton Tensor and Einstein-Maxwell Spacetimes Conformal to Einstein Spaces [PDF]

, 2007
In this paper we characterize the source-free Einstein-Maxwell spacetimes which have a trace-free Chevreton tensor. We show that this is equivalent to the Chevreton tensor being of pure-radiation type and that it restricts the spacetimes to Petrov types \
Balfagón A, Bel L, Bel L, Bergqvist G, Cahen M, Chevreton M, Collinson C D, Edgar S B, Eriksson I, Göran Bergqvist, Ingemar Eriksson, Merkulov S A, Nurowski P, Penrose R, Penrose R, Senovilla J M M, Senovilla J M M Aldaya V Cerveró J M, Stephani H   +17 more
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Einstein solvmanifolds and the pre-Einstein derivation [PDF]

Transactions of the American Mathematical Society, 2011
An Einstein nilradical is a nilpotent Lie algebra, which can be the nilradical of a metric Einstein solvable Lie algebra. The classification of Riemannian Einstein solvmanifolds (possibly, of all noncompact homogeneous Einstein spaces) can be reduced to determining, which nilpotent Lie algebras are Einstein nilradicals and to finding, for every ...
openaire   +3 more sources

ZUR ELEKTRODYNAMIK BEWEGTER KÖRPER (facsimile)

Revista Brasileira de História da Matemática, 2020
ZUR ELEKTRODYNAMIK BEWEGTER KÖRPER  (facsimile)
Albert Einstein
doaj   +1 more source

On the spherically symmetric Einstein-Yang-Mills-Higgs equations in Bondi coordinates

, 2012
We revisit and generalize, to the Einstein-Yang-Mills-Higgs system, previous results of D. Christodoulou and D. Chae concerning global solutions for the Einstein-scalar field and the Einstein-Maxwell-Higgs equations.
Tadmon, Calvin, Tchapnda, Sophonie Blaise   +1 more
core   +1 more source

Śladami „skradzionego” mózgu. Fantastyczne fabuły w romanetach Jakuba Arbesa

Czytanie Literatury, 2017
Artykuł dotyczy wyznaczników romaneto – gatunku literackiego zapoczątkowanego przez czeskiego pisarza Jakuba Arbesa – przyjmując za punkt wyjścia sposób, w jaki rozwijają się w nim fantastyczne fabuły.
Margreta Grigorowa
doaj   +1 more source

Doubly Special Relativity with a minimum speed and the Uncertainty Principle

, 2017
The present work aims to search for an implementation of a new symmetry in the space-time by introducing the idea of an invariant minimum speed scale ($V$).
CLÁUDIO NASSIF, Einstein A., Einstein A., Einstein A., Einstein A., Einstein A., Einstein A., FitzGerald G. F., Jordan P., Kaluza T., Licata I., Mach E., Magueijo J., Poincaré H., Schrödinger E.   +14 more
core   +1 more source

The ultrafast Einstein–de Haas effect [PDF]

Nature, 2018
The Einstein-de Haas effect was originally observed in a landmark experiment1 demonstrating that the angular momentum associated with aligned electron spins in a ferromagnet can be converted to mechanical angular momentum by reversing the direction of ...
C. Dornes, Y. Acremann, M. Savoini, M. Kubli, Martin J. Neugebauer, Elsa Abreu, L. Huber, G. Lantz, C. Vaz, H. Lemke, E. Bothschafter, M. Porer, V. Esposito, Laurenz Rettig, M. Buzzi, A. Alberca, Y. W. Windsor, P. Beaud, Urs Staub, D. Zhu, Sanghoon Song, J. Glownia, S. Johnson   +22 more
semanticscholar   +1 more source

“El cántaro” o la creatividad de lo vacuo en la poesía de José Ángel Valente

Arbor: Ciencia, Pensamiento y Cultura, 2007
A través del comentario de “El cántaro”, uno de los poemas más importantes del Valente de Poemas a Lázaro (1960), se estudia la importancia de la androginia en la poesía y en la poética valentianas.
José Andrés Calvo Rodríguez
doaj   +1 more source

Self-Dual Action for Fermionic Fields and Gravitation [PDF]

, 1995
This paper studies the self-dual Einstein-Dirac theory. A generalization is obtained of the Jacobson-Smolin proof of the equivalence between the self-dual and Palatini purely gravitational actions. Hence one proves equivalence of self-dual Einstein-Dirac
A. Ashtekar, A. Ashtekar, B. P. Dolan, C. Rovelli, F. W. Hehl, F. W. Hehl, G. Esposito, Giampiero Esposito, Hugo A. Morales-Técotl, J. E. Nelson, P. A. M. Dirac, R. Floreanini, R. Penrose, R. Penrose, T. Jacobson, T. Jacobson, T. W. B. Kibble   +16 more
core   +2 more sources