100 years of the Friedmann equation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985840%3A_____%2F22%3A00559513" target="_blank" >RIV/67985840:_____/22:00559513 - isvavai.cz</a>
Result on the web
<a href="https://css2022.math.cas.cz/proceedingsCSS2022.pdf" target="_blank" >https://css2022.math.cas.cz/proceedingsCSS2022.pdf</a>
DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
100 years of the Friedmann equation
Original language description
In 1922, Alexander Friedmann applied Einstein’s equations to a three-dimensional sphere to describe the evolution of our universe. In this way he obtained a nonlinear ordinary differential equation (called after him) for the expansion function representing the radius of that sphere. At present, the standard cosmological ΛCDM model of the universe is based just on the Friedmann equation. It needs a significant amount of dark matter, about six times that of the usual baryonic matter, besides an even larger amount of dark energy to be consistent with the real universe. But to date, both dark matter and dark energy have remained without concrete evidence based on direct physical measurements. We present several arguments showing that such a claimed amount of dark matter and dark energy can only be the result of vast overestimation, incorrect extrapolations, and that it does not correspond to the real universe. The spatial part of our universe seems to be locally flat and thus it can be locally modeled by the Euclidean space. However, Friedmann did not consider the flat space with zero curvature. Therefore, in the second part of this paper we will derive a general form of the corresponding metric tensor satisfying Einstein’s equations with zero right-hand side.
Czech name
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Czech description
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Classification
Type
D - Article in proceedings
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Article name in the collection
Proceedings of the International Conference Cosmology on Small Scales 2022 : Dark Energy and the Local Hubble Expansion Problem
ISBN
978-80-85823-72-1
ISSN
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e-ISSN
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Number of pages
14
Pages from-to
131-144
Publisher name
Institute of Mathematics CAS
Place of publication
Prague
Event location
Prague
Event date
Sep 21, 2022
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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