International Conference
Excessive Extrapolations
and Selected Controversies in Cosmology

September 23–26, 2020
Institute of Mathematics, Czech Academy of Sciences,
Zitna 25, Prague, Czech Republic

Aims and scope:
According to the modern cosmological paradigm, about 2/3 of the energy of the Universe is in the dark form and about 5/6 of the matter is invisible. However, numerous recent attempts to detect independently the dark-matter particles failed, and a number of other problems with the existence of dark energy and dark matter (such as the anomalous friction in the dark-matter halos of galaxies, etc.) become now more and more obvious.
All these troubles raise the question if the "dark" substance is merely a result of excessive extrapolations involved in the theoretical analysis? So, it is timely to gather specialists from various branches of astronomy and astrophysics to discuss these issues.

Conference topics:
  • Mathematical aspects of the extrapolations used in cosmology
  • Arguments for and against dark matter, and revisiting the foundations of physics
  • Alternative models for dark matter and dark energy
  • A systematic discord in the value of the Hubble constant derived by different methods
  • Theoretical possibility and observational evidence for small-scale cosmological effects
  • Complementary redshifts of non-cosmological nature
  • Quantum effects on the early universe and their observational imprints at the present time

Conference announcements:
Download PDF
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Conference program:
Lectures are available at

List of participants:
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Conference venue:
Institute of Mathematics, Czech Academy of Sciences, Zitna 25, Prague 1
Google Information for visitors]

Proceedings 2020 to download:
PDF of the complete book.

Proceedings 2018 to download:
PDF of the complete book.

Proceedings 2016 to download:
PDF of the complete book.

The conference is free of charge for all accepted participants. In order to register, please, send the enclosed REGISTRATION FORM containing your name, titles, and affiliation to the address below by April 30, 2020. If you wish to present a talk, include its tentative title. Early registration is strongly recommended.

Participants are supposed to organize their own accommodation. There is a variety of possibilities in the vicinity of the venue. We have positive experience with Residence V Tunich. However, there are many other options within a 5 minute walk: Hotel Andante, Hotel Amarilis, Hotel First Republic Prague, etc.

  • April 30, 2020 - registration
  • April 30, 2020 - submissions for proceedings
  • June 30, 2020 - acceptance of contributions to proceedings

Scientific committee:
Assoc. Prof. Yurii Dumin (Moscow State University & Space Research Institute of RAS, Russia)
Prof. Itzhak Goldman (Afeka College, Israel)
Prof. Igor Karachentsev (Special Astrophysical Observatory of RAS, N. Arkhyz, Russia)
Prof. Sergei Kopeikin (University of Missouri, U.S.A.)
Prof. Pavel Kroupa (University of Bonn, Germany)
Prof. Andre Maeder (Geneva Observatory, Switzerland)
Assoc. Prof. Attila Meszaros (Charles University, Czech Republic)
Prof. Marek Nowakowski (Universidad de los Andes, Colombia)
Prof. Lawrence Somer (The Catholic University of America, U.S.A.)
Prof. Alessandro Spallicci (University of Orleans, CNRS, France)
Prof. Alexei Starobinsky (Landau Institute of RAS, Russia)

Local organizing committee:
Prof. Michal Krizek (Chair)
Assoc. Prof. Yurii Dumin (Vice-Chair)
Assoc. Prof. Tomas Vejchodsky
Hana Bilkova

Contact address:
Prof. RNDr. Michal Krizek, DrSc.
Institute of Mathematics, Czech Academy of Sciences
Zitna 25
115 67 Prague 1
Czech Republic
Phone: +420 222 090 712
Fax: +420 222 090 701


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Last update: September 1, 2020