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[Fizinfo] Invitation - 2023.03.20. 14:00 - "Research Professor" presentation – Rácz István

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  • From: Pothoczki Szilvia <pothoczki.szilvia AT>
  • To: Wignerusers <wignerusers AT>, Fizinfo <fizinfo AT>
  • Subject: [Fizinfo] Invitation - 2023.03.20. 14:00 - "Research Professor" presentation – Rácz István
  • Date: Sun, 19 Mar 2023 12:57:31 +0000
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  • Mail-reply-to: pothoczki.szilvia AT

Kedves Kollégák!

Technikai okokból az eseményre a II. épület Médiatermében kerül sor.
A zoom linkek nem módosultak.

Pothoczki Szilvia


Dear Colleagues,

The Scientific Council of the Wigner RCP, Institute for Particle and Nuclear Physics invites you to attend the lecture by

Dr. István Rácz

related to his application for the title of 'Research Professor'.

Spacetime Singularities and Curvature Blow-ups

The presentation will take place on Monday, March 20, 2023 at 2:00 pm. in the conference room of Building 1, 1st floor of the KFKI Campus.

You may also join the event online using the following link:
Meeting ID: 820 2500 7930
Passcode: 260343

Unless someone will need English as the language of the lecture, the talk will be given in Hungarian, however, presenting English slides.
This talk is a public event; all those interested are welcome to attend or to join on-line.

Best regards,
Szilvia Pothoczki

On behalf of Edit Szilágyi
Chairman of Scientific Council of the Wigner RCP,
Institute for Particle and Nuclear Physics

The "singularity theorems" of Penrose, Hawking, and Geroch predict only the existence of incomplete inextendible causal geodesics in a wide range of physically adequate spacetimes modeling the gravitational collapse of stars and the expanding universe. In contrast, on physical grounds, singularities are expected to be associated with the blow-up of some physical quantities. The aim of this seminar is to give a brief overview of the basic concepts related to our current understanding of spacetime singularities. Special attention will be given to some aspects of the initial value formulation of general relativity, the cosmic censor hypotheses proposed by Penrose, and also to results on spacetime extensions. These preparations will be used to outline an argument that could provide important insights into the generic properties of spacetime singularities. In particular, it will be argued that if a suitable low regular form of the strong cosmic censor hypothesis holds, then a parallelly propagated blow-up of either the tidal force or the frame-drag part of the curvature must occur in "generic" timelike geodesically incomplete maximal Cauchy developments.

* Rácz, I. (1993): Spacetime extensions I., Journal of Mathematical Physics 34, 2448-2464
* Rácz, I. (2010): Spacetime extensions II, Classical and Quantum Gravity, 27, 155007,
In 2011 the Editorial Board of Classical and Quantum Gravity selected this paper as one of the Highlights of 2010.
* Rácz, I. (2023): Spacetime singularities and curvature blow-ups, General Relativity and Gravitation 55, Article number: 3

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