Academic literature on the topic 'Cosmic Gravitation'

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Journal articles on the topic "Cosmic Gravitation"

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Linder, Eric V. "Model-independent tests of cosmic gravity." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 369, no. 1957 (2011): 4985–97. http://dx.doi.org/10.1098/rsta.2011.0288.

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Gravitation governs the expansion and fate of the universe, and the growth of large-scale structure within it, but has not been tested in detail on these cosmic scales. The observed acceleration of the expansion may provide signs of gravitational laws beyond general relativity (GR). Since the form of any such extension is not clear, from either theory or data, we adopt a model-independent approach to parametrizing deviations to the Einstein framework. We explore the phase space dynamics of two key post-GR functions and derive a classification scheme, and an absolute criterion on accuracy neces
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JOSHI, PANKAJ S. "COSMIC CENSORSHIP: A CURRENT PERSPECTIVE." Modern Physics Letters A 17, no. 15n17 (2002): 1067–79. http://dx.doi.org/10.1142/s0217732302007570.

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End state of gravitational collapse and the related cosmic censorship conjecture continue to be amongst the most important open problems in gravitation physics today. My purpose here is to bring out several aspects related to gravitational collapse and censorship, which may help towards a better understanding of the issues involved. Possible physical constraints on gravitational collapse scenarios are considered. It is concluded that the best hope for censorship lies in analyzing the genericity and stability properties of the currently known classes of collapse models which lead to the formati
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Nesbet, Robert K. "Conformal Theory of Gravitation and Cosmic Expansion." Symmetry 16, no. 1 (2023): 3. http://dx.doi.org/10.3390/sym16010003.

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The postulate of universal Weyl conformal symmetry for all elementary physical fields introduces nonclassical gravitational effects in both conformal gravitation (CG) and the conformal Higgs model (CHM). The resulting theory is found to explain major observed phenomena, including excessive galactic rotation velocities and accelerating Hubble expansion, without invoking dark matter (DM). The recent history of this development is surveyed here. The argument is confined to implications of classical field theory, which include galactic baryonic Tully–Fisher relationships and dark galactic haloes o
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ALIMI, JEAN-MICHEL, and ANDRÉ FÜZFA. "IS DARK ENERGY ABNORMALLY WEIGHTING?" International Journal of Modern Physics D 16, no. 12b (2007): 2587–92. http://dx.doi.org/10.1142/s0218271807011206.

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We investigate the possibility that dark energy does not couple to gravitation in the same way as ordinary matter, yielding a violation of the weak and strong equivalence principles on cosmological scales. We build a transient mechanism in which gravitation is pushed away from general relativity (GR) by a Born–Infeld (BI) gauge interaction acting as an "abnormally weighting (dark) energy" (AWE). This mechanism accounts for the Hubble diagram of far-away supernovae by cosmic acceleration and time variation of the gravitational constant while accounting naturally for the present tests on GR.
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Liang, Bin. "The Dark Matter and Dark Energy in Cosmic Evolution." Applied Physics Research 9, no. 6 (2017): 14. http://dx.doi.org/10.5539/apr.v9n6p14.

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This article is on an in-depth study of the relationship between the dark matter, dark energy, radiation field and gravitation field, based on the standard cosmic model and the principle that dark energy is originated from the destructive interference of electromagnetic radiation field. It explains the dynamic mechanism of cosmic expansion and contraction, and calculates the densities of dark matter, dark energy, radiation field and gravitation field.
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Helliwell, T. M., and D. A. Konkowski. "Cosmic strings: Gravitation without local curvature." American Journal of Physics 55, no. 5 (1987): 401–7. http://dx.doi.org/10.1119/1.15145.

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UNNIKRISHNAN, SANIL, and T. R. SESHADRI. "COSMIC ACCELERATION IN A MODEL OF SCALAR–TENSOR GRAVITATION." International Journal of Modern Physics D 17, no. 11 (2008): 2007–15. http://dx.doi.org/10.1142/s0218271808013674.

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In this paper we consider a model of the scalar–tensor theory of gravitation, in which the scalar field ϕ determines the gravitational coupling G and has a Lagrangian of the form [Formula: see text]. We study the cosmological consequence of this theory in the matter-dominated era and show that it leads to a transition from an initial decelerated expansion to an accelerated expansion phase at the present epoch. Using observational constraints, we see that the effective equation of state today for the scalar field turns out to be pϕ = wϕρϕ, with wϕ = -0.88, and that the transition to an accelera
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Dr., Sergey V. Simonenko. "THE PREDICTION OF THE THERMOHYDROGRAVIDYNAMIC THEORY CONCERNING THE STRONGEST INTENSIFICATIONS OF THE GLOBAL NATURAL PROCESSES OF THE EARTH SINCE 18 JULY, 2017 AND BEFORE 26 FEBRUARY, 2018." International Journal of Research - Granthaalayah 5, no. 8 (2017): 127–45. https://doi.org/10.5281/zenodo.885023.

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The article presents (on 21 August, 2017) the prediction of the established global prediction thermohydrogravidynamic principle (of the developed thermohydrogravidynamic theory containing the cosmic geophysics and the cosmic seismology based on the author’s generalization of the first law of thermodynamics for non-stationary cosmic gravitation) concerning the strongest intensifications (since 18 July, 2017 and before 26 February, 2018) of the global seismotectonic, volcanic, climatic and magnetic processes of the Earth determined by the maximal (near 7 November, 2017) combined integral energy
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Zhelnorovich, V. A. "Relativistic theory of gravitation and cosmic vacuum." Gravitation and Cosmology 14, no. 4 (2008): 327–31. http://dx.doi.org/10.1134/s0202289308040063.

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GAMBINI, RODOLFO, and JORGE PULLIN. "QUANTUM COSMIC CENSOR: GRAVITATION MAKES REALITY UNDECIDABLE." International Journal of Modern Physics D 17, no. 13n14 (2008): 2535–38. http://dx.doi.org/10.1142/s0218271808014047.

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When one takes into account gravitation, the measurement of space and time cannot be carried out with infinite accuracy. When quantum mechanics is reformulated taking into account this lack of accuracy, the resolution of the measurement problem can be performed via decoherence without the usual pitfalls. The resulting theory has the same physical predictions of quantum mechanics with a reduction postulate, but is radically different, with the quantum states evolving unitarily in terms of the underlying variables. Gravitation therefore makes this worrisome situation, potentially leading to two
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Dissertations / Theses on the topic "Cosmic Gravitation"

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Rajamanoharan, Senthooran. "Cosmic superstrings and bimetric gravity." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610853.

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Pettinari, Guido Walter. "The intrinsic bispectrum of the Cosmic Microwave Background." Thesis, University of Portsmouth, 2013. https://researchportal.port.ac.uk/portal/en/theses/the-intrinsic-bispectrum-of-the-cosmic-microwave-background(ce62a4e8-625f-4c84-9e0c-821df12cba10).html.

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Cosmology, intended as the study of the origin and evolution of the Universe and its components, has advanced from being a philosophical discipline to a data-driven science. Much of this progress was achieved in the last few decades thanks to the wealth of cosmological data from Earth and space-based experiments. The abundance of observational constraints has considerably narrowed the space for theoretical speculation, to the point that now most of the cosmological community agrees on a standard model of cosmology. A crucial assumption of this model is that the structure observed in the Univer
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Delahaye, Timur. "Propagation of galactic cosmic rays and dark matter indirect detection." Chambéry, 2010. http://www.theses.fr/2010CHAMS019.

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Cette thèse est dédiée à l'étude de la propagation des électrons et positrons cosmiques dans la Voie Lactée ainsi qu'à la détection indirecte de matière sombre. L'existence de la matière sombre dans l'Univers est une hypothèse raisonnable du point de vue de la cosmologie, de l'astrophysique mais également de la physique des particules. Pourtant sa détection nous échappe encore et il n'est pas possible de vérifier la validité de cette hypothèse autrement que par des moyens faisant intervenir la gravitation. L'une des voies possibles pour la détection de la matière sombre et la compréhension de
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Da, Silva Caroline Dos Santos. "Cosmic strings and scalar tensor gravity." Thesis, Durham University, 1999. http://etheses.dur.ac.uk/4577/.

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This thesis is concerned with the study of cosmic strings. We studied the values for the Higgs mass and string coupling for which the gravitational effect of an infinite cosmic string in the context of the Einstein theory is not only locally but also globally weak. We conclude this happens for strings formed at scales less or equal to the Planck one with Higgs mass being less or equal to the boson vectorial mass. Then we examined the metric of an isolated self-gravitating abelian-Higgs vortex in dilatonic gravity for arbitrary coupling of the vortex fields to the dilaton. We looked for solutio
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Santos, Sérgio Mittmann dos. "Cordas cósmicas girantes na gravitação de Brans-Dicke." Universidade Estadual Paulista (UNESP), 2018. http://hdl.handle.net/11449/153631.

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Submitted by Sérgio Mittmann dos Santos (smittmanns@gmail.com) on 2018-04-13T23:20:37Z No. of bitstreams: 1 Tese_SMdS.pdf: 14966593 bytes, checksum: 50aeb1b3bc772ed3ff21708296193489 (MD5)<br>Rejected by Pamella Benevides Gonçalves null (pamella@feg.unesp.br), reason: Solicitamos que realize correções na submissão seguindo as orientações abaixo: É necessário revisar a formatação das referências seguindo a ABNT 6023:2003, por exemplo, o que ocorre em sua Tese é a ausência da indicação de autoria segundo as normas, abaixo orientação da ABNT. entre outros elementos. 8.1.1 Autor
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Siemens, Xavier. "Gravitational waves and cosmic strings /." Thesis, Connect to Dissertations & Theses @ Tufts University, 2002.

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Thesis (Ph.D.)--Tufts University, 2002.<br>Adviser: Alexander Vilenkin. Submitted to the Dept. of Physics. Includes bibliographical references (leaves 95-98). Access restricted to members of the Tufts University community. Also available via the World Wide Web;
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Acquaviva, Viviana. "Weak Lensing and Cosmic Acceleration." Doctoral thesis, SISSA, 2006. http://hdl.handle.net/20.500.11767/4188.

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Steigerwald, Heinrich Maria. "Explorer la physique de l'accélération cosmique." Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4708/document.

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L'expansion accélérée de l'univers est devenu un fait établi que personne ne pouvait prévoir il y a encore une vingtaine d'années. Pour expliquer l'accélération cosmique, l'univers doit être composé de $75%$ d'énergie noire, une matière hypothétique à pression négative. Une alternative aussi vertigineuse consiste à modifier la relativité générale d'Einstein à l'échelle cosmique.Mes travaux de thèse portent sur la contrainte des modèles d'énergie noire et de gravité modifiée avec les données observationnelles provenant de la croissance linéaire des structures cosmologiques. Une méthode basée su
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Schluessel, Edmund Rudolph. "Long-wavelength gravitational waves and cosmic acceleration." Thesis, Cardiff University, 2011. http://orca.cf.ac.uk/38028/.

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Multiple observations of distant type Ia supernovae show the deceleration parameter of the universe is negative. The standard cosmological model states expansion should be slowing down. A new theory is presented which explains cosmic acceleration only through the action of well-supported phenomena in the context of Einstein's general theory of relativity through the use of the Bianchi type IX homogeneous,closed cosmology. The evidence for acceleration is assessed and previously-unreported biases and insuffiencies in the evidence are revealed and discussed. The Einstein equations for the Bianch
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Tang, Chein-Jen. "Detecting Cosmic Gravitational-wave Background with LISA." Thesis, Imperial College London, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.508491.

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Books on the topic "Cosmic Gravitation"

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National Research Council (U.S.). Panel on Gravitation, Cosmology, and Cosmic-Ray Physics., ed. Gravitation, cosmology, and cosmic-ray physics. National Academy Press, 1986.

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Gregory, Ruth. Cosmological cosmic strings. Fermi National Accelerator Laboratory, 1988.

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COSPAR. Scientific Commission H. H0.1 Symposium. Fundamental physics in space: Proceedings of the H0.1 Symposium of COSPAR Scientific Commission H which was held during the Thirty-second COSPAR Scientific Assembly, Nagoya, Japan, 12-19 July, 1998. Published for the Committee on Space Research [by] Pergamon, 2000.

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Everitt, C. W. F. 1934-, Reinhard R, and COSPAR. Scientific Commission H. Symposium, eds. Fundamental physics in space. Published for the Committee on Space Research [by] Pergamon, 2003.

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Grib, Andreĭ Anatolʹevich. Vakuumnye kvantovye ėffekty v silʹnykh poli͡a︡kh. 2-ге вид. Ėnergoatomizdat, 1988.

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Srivastava, N. D. Foundations of vedantic physics: The cosmic law of gravitation & the symmetric coherent universe. Tilatara Corporation, 2006.

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Aurelio, Morales-Técotl Hugo, ed. Gravitational physics: Testing gravity from submillimeter to cosmic scale ; proceedings of the VIII Mexican School on Gravitation and Mathematical Physics ; Playa del Carmen, Quintana Roo, Mexico, 6-12 December 2009. American Institute of Physics, 2010.

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Bliokh, Pavel. Dusty and Self-Gravitational Plasmas in Space. Springer Netherlands, 1995.

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Laboratory, Fermi National Accelerator, and United States. National Aeronautics and Space Administration., eds. Non-gaussian microwave background fluctuations from nonlinear gravitational effects. Fermi National Accelerator Laboratory, 1991.

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Laboratory, Fermi National Accelerator, and United States. National Aeronautics and Space Administration., eds. Non-gaussian microwave background fluctuations from nonlinear gravitational effects. Fermi National Accelerator Laboratory, 1991.

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Book chapters on the topic "Cosmic Gravitation"

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Eardley, D. M. "Cosmic Strings and the Origin of Structure in the Universe." In Gravitation in Astrophysics. Springer US, 1987. http://dx.doi.org/10.1007/978-1-4613-1897-2_10.

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Barenbaum, A. A. "Experiments of S. Shnol, the Physical Nature of Gravitation, Hubble's Law and Cosmic Microwave Background Radiation." In Springer Proceedings in Earth and Environmental Sciences. Springer Nature Switzerland, 2025. https://doi.org/10.1007/978-3-031-88459-7_48.

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Karel Velan, A. "Gravitation." In The Multi-Universe Cosmos. Springer US, 1992. http://dx.doi.org/10.1007/978-1-4684-6030-8_10.

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Ungarelli, Carlo. "Cosmic Gravitational Background, Stochastic." In Encyclopedia of Complexity and Systems Science. Springer New York, 2009. http://dx.doi.org/10.1007/978-0-387-30440-3_106.

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Feldbaum, David M. "Polarization of Cosmic Microwave Background." In Gravitational Waves: An Overview. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-031-02613-3_28.

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Barish, Barry C. "Gravitational Waves." In Cosmic Radiations: From Astronomy to Particle Physics. Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-0634-7_3.

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Congdon, Arthur B., and Charles R. Keeton. "Lensing of the Cosmic Microwave Background." In Principles of Gravitational Lensing. Springer International Publishing, 2018. http://dx.doi.org/10.1007/978-3-030-02122-1_9.

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Baryshev, Yurij, and Pekka Teerikorpi. "Gravitational Physics for Cosmic Scales." In Fundamental Questions of Practical Cosmology. Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-2379-5_5.

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Webster, Rachel, and Paul Hewett. "Gravitational Lensing and Cosmic Strings." In Large Scale Structures of the Universe. Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-009-2995-1_151.

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Wald, Robert M. "Gravitational Collapse and Cosmic Censorship." In Black Holes, Gravitational Radiation and the Universe. Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-017-0934-7_5.

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Conference papers on the topic "Cosmic Gravitation"

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Mukhanov, V. "Cosmic Inflation." In COSMOLOGY AND GRAVITATION: XIIth Brazilian School of Cosmololy and Gravitation. AIP, 2007. http://dx.doi.org/10.1063/1.2752479.

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Rebouças, M. J. "A brief introduction to cosmic topology." In COSMOLOGY AND GRAVITATION: XIth Brazilian School of Cosmology and Gravitation. AIP, 2005. http://dx.doi.org/10.1063/1.2032731.

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Villela, Thyrso, Carlos Alexandre Wuensche, Mario Novello, and Santiago Perez. "Cosmic Microwave Background Physics: Observations." In COSMOLOGY AND GRAVITATION: XIII Brazilian School on Cosmology and Gravitation (XIII BSCG). AIP, 2009. http://dx.doi.org/10.1063/1.3151837.

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Sudarsky, Daniel, Adolfo De Unánue T., Alfredo Herrera-Aguilar, Francisco S. Guzmán Murillo, Ulises Nucamendi Gómez, and Israel Quiros. "The seeds of cosmic structure: A phenomenological approach." In GRAVITATION AND COSMOLOGY: Proceedings of the Third International Meeting on Gravitation and Cosmology. AIP, 2008. http://dx.doi.org/10.1063/1.3058573.

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Challinor, Anthony, Hiranya Peiris, Mario Novello, and Santiago Perez. "Lecture notes on the physics of cosmic microwave background anisotropies." In COSMOLOGY AND GRAVITATION: XIII Brazilian School on Cosmology and Gravitation (XIII BSCG). AIP, 2009. http://dx.doi.org/10.1063/1.3151849.

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Rodríguez-Montoya, Iván, Miguel A. García-Aspeitia, Juan Magaña, Tonatiuh Matos, Alfredo Macias, and Marco Maceda. "Cosmic Braneworld and Ultralight Bosonic Dark Matter." In RECENT DEVELOPMENTS IN GRAVITATION AND BEC’S PHENOMENOLOGY: IV Mexican Meeting on Experimental and Theoretical Physics: Symposium on Gravitation BEC’s Phenomenology. AIP, 2010. http://dx.doi.org/10.1063/1.3531635.

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Alcaniz, J. S., R. S. Gonçalves, and R. F. L. Holanda. "Tests of the cosmic distance duality relation." In II COSMOSUR: COSMOLOGY AND GRAVITATION IN THE SOUTHERN CONE. AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4913332.

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Waga, I., M. O. Calvão, R. Giostri, et al. "Investigating the transition from cosmic deceleration to acceleration." In I COSMOSUL: COSMOLOGY AND GRAVITATION IN THE SOUTHERN CONE. AIP, 2012. http://dx.doi.org/10.1063/1.4756803.

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Landau, Susana J. "Testing non-standard inflationary models with the cosmic microwave background." In II COSMOSUR: COSMOLOGY AND GRAVITATION IN THE SOUTHERN CONE. AIP Publishing LLC, 2015. http://dx.doi.org/10.1063/1.4913328.

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Alcubierre, M. "Cosmic censor violation, Big Crunch, or none of the above?" In GRAVITATION AND COSMOLOGY: 2nd Mexican Meeting on Mathematical and Experimental Physics. AIP, 2005. http://dx.doi.org/10.1063/1.1900518.

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Reports on the topic "Cosmic Gravitation"

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Bennett, David P., and Albert Stebbins. ARC MINUTE GRAVITATIONAL LENSES AND COSMIC STRINGS. Office of Scientific and Technical Information (OSTI), 1986. http://dx.doi.org/10.2172/1448034.

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Baxter, Eric Jones. Detecting Gravitational Lensing of the Cosmic Microwave Background by Galaxy Clusters. Office of Scientific and Technical Information (OSTI), 2014. http://dx.doi.org/10.2172/1182549.

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