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Mathematical Aspects of Paradoxes in Cosmology: Can Mathematics Explain the Contemporary Cosmological Crisis?

Posted By: AvaxGenius

Date: 7 Jul 2023 10:21:31

This book provides a mathematical and numerical analysis of many problems which lead to paradoxes in contemporary cosmology, in particular, the existence of dark matter and dark energy. It is shown that these hypothetical quantities arise from excessive extrapolations of simple mathematical models to the whole physical universe. Written in a completely different style to most books on General Relativity and cosmology, the important results take the form of mathematical theorems with precise assumptions and statements. All theorems are followed by a corresponding proof, or an exact reference to the proof.

Science three-dimensional hypersphere dark matter dark energy hyperbolic pseudosphere Friedmann equation Mathematical Physics Numerical Analysis Astronomy Cosmology Space Sciences Gravitational Physics

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Galaxies: Formation and Evolution

Posted By: AvaxGenius

Date: 11 Oct 2022 02:24:49

Galaxies are vast ensembles of stars, gas and dust, embedded in dark matter halos. They are the basic building blocks of the Universe, gathered in groups, clusters and super-clusters. They exist in many forms, either as spheroids or disks. Classifications, such as the Hubble sequence (based on mass concentration and gas fraction) and the colormagnitude diagram (which separates a blue cloud from a red sequence) help to understand their formation and evolution. Galaxies spend a large part of their lives in the blue cloud, forming stars as spiral or dwarf galaxies. Then, via a mechanism that is still unclear, they stop forming stars and quietly end in the red sequence, as spheroids.

Science Galaxies Galaxy Physics Evolution stars gas dark matter halos dark matter blocks Universe clusters super-clusters cloud black holes

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Fundamentals of Cosmology, 2nd Edition (Repost)

Posted By: AvaxGenius

Date: 25 Aug 2021 14:45:50

Fundamentals of Cosmology, 2nd Edition (Repost)

Fundamentals of Cosmology, 2nd Edition by James Rich
English | PDF | 2009 | 332 Pages | ISBN : 3642027997 | 7.4 MB

A self-contained introduction to general relativity that is based on the homogeneity and isotropy of the local universe. Emphasis is placed on estimations of the densities of matter and vacuum energy, and on investigations of the primordial density fluctuations and the nature of dark matter.

Science Astronomy Cosmology Physics relativity general relativity nature dark matter

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Gravitational Theories Beyond General Relativity (Repost)

Posted By: AvaxGenius

Date: 25 Jul 2021 23:28:40

Gravitational Theories Beyond General Relativity (Repost)

Despite the success of general relativity in explaining classical gravitational phenomena, several problems at the interface between gravitation and high energy physics still remain open. The purpose of this thesis is to explore quantum gravity and its phenomenological consequences for dark matter, gravitational waves and inflation. A new formalism to classify gravitational theories based on their degrees of freedom is introduced and, in light of this classification, it is argued that dark matter is no different from modified gravity.

Physics dark matter gravitational waves gravity Gravitational Theories General Relativity Science Science Science

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