Results 11 to 20 of about 5,332,863 (278)

REISSNER–NORDSTRÖM EXPANSION [PDF]

open access: yesDark Matter in Astroparticle and Particle Physics, 2007
We propose a classical mechanism for the cosmic expansion during the radiation-dominated era. This mechanism assumes that the Universe is a two-component gas. The first component is a gas of ultra-relativistic "normal" particles described by an equation of state of an ideal quantum gas of massless particles.
Prodanov, E M   +2 more
openaire   +6 more sources

Simulating expansions without expansions [PDF]

open access: yesMathematical Structures in Computer Science, 1994
We add extensional equalities for the functional and product types to the typed λ-calculus with, in addition to products and terminal object, sums and bounded recursion (a version of recursion that does not allow recursive calls of infinite length). We provide a confluent and strongly normalizing (thus decidable) rewriting system for the calculus that ...
Di Cosmo, Roberto, Kesner, Delia
openaire   +1 more source

Monotone expansion [PDF]

open access: yes, 2011
This work, following the outline set in [B2], presents an explicit construction of a family of monotone expanders. The family is essentially defined by the Mobius action of SL_2(R) on the real line.
Bourgain, Jean, Yehudayoff, Amir
core   +1 more source

String Expansion as Large N Expansion of Gauge Theories [PDF]

open access: yes, 1998
We consider string perturbative expansion in the presence of D-branes imbedded in orbifolded space-time. In the regime where the string coupling is weak and $\alpha'\to 0$, the string perturbative expansion coincides with `t Hooft's large N expansion. We
Bern   +13 more
core   +4 more sources

Expansion, Geometry, and Gravity [PDF]

open access: yes, 2004
In general-relativistic cosmological models, the expansion history, matter content, and geometry are closely intertwined. In this brief paper, we clarify the distinction between the effects of geometry and expansion history on the luminosity distance. We
Benoit A   +12 more
core   +2 more sources

Accelerating expansion [PDF]

open access: yesRNA, 2015
This article considers the state of the RNA field and how it has progressed over a time span of decades.
openaire   +3 more sources

Bigravity from gradient expansion [PDF]

open access: yes, 2016
We discuss how the ghost-free bigravity coupled with a single scalar field can be derived from a braneworld setup. We consider DGP two-brane model without radion stabilization.
Tanaka, Takahiro, Yamashita, Yasuho
core   +2 more sources

Vacuum driven accelerated expansion [PDF]

open access: yes, 2008
It has been shown that an improved estimation of quantum vacuum energy can yield not only acceptable but also experimentally sensible results. The very idea consists in a straightforward extraction of gravitationally interacting part of the full quantum ...
Ball   +16 more
core   +1 more source

Deterioration of Mortar Bars Using Binary and Ternary Mixtures Immersed in Sodium Sulfate Solutions

open access: yesCeramics, 2022
In this study, the performance of several binary and ternary mixtures containing high-calcium fly ash and other pozzolans, such as Class F fly ash and silica fume, were investigated for their sulfate resistance using different sodium sulfate solutions ...
Federico Aguayo, Mehrab Nodehi
doaj   +1 more source

N-expansive flows [PDF]

open access: yesTopology and its Applications, 2022
arXiv admin note: substantial text overlap with arXiv:1507 ...
Alfonso Artigue   +2 more
openaire   +2 more sources

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