Mathematical aspects of the physics with non-self-adjoint operators / Les aspects mathématiques de la physique avec les opérateurs non-auto-adjoints

Collection Mathematical aspects of the physics with non-self-adjoint operators / Les aspects mathématiques de la physique avec les opérateurs non-auto-adjoints

Organizer(s) Lucrezia Cossetti (University of the Basque Country) Borbala Gerhat (Institute of Science and Technology Austria) David Krejčiřík (Czech Technical University of Prague) Petr Siegl (Graz University of Technology)

Date(s) 20/04/2026 - 24/04/2026

linked URL https://conferences.cirm-math.fr/3476.html

00:00:00 / 00:00:00

1 5

A new phase transition in cosmological fluid dynamics

On a background Minkowski spacetime, the Euler equations (both relativistic and not) are known to admit unstable homogeneous solutions with finite-time shock formation. Such shock formation can be suppressed on cosmological spacetimes whose spatial slices expand at an accelerated rate. However, situations with decelerated expansion, which are relevant in our early universe, are not as well understood. I will present some recent joint work in this direction, based on collaborations with David Fajman, Maciej Maliborski, Todd Oliynyk and Max Ofner.

Information about the video

Date of recording 21/04/2026
Date of publication 21/05/2026
Institution CIRM
Licence CC BY NC ND
Language English
Audience Researchers, Graduate Students
Director(s) Guillaume Hennenfent
Format MP4

Citation data

DOI 10.24350/CIRM.V.20474403
Cite this video Wyatt, Zoe (21/04/2026). A new phase transition in cosmological fluid dynamics. CIRM. Audiovisual resource. DOI: 10.24350/CIRM.V.20474403
URL https://dx.doi.org/10.24350/CIRM.V.20474403

Domain(s)

Bibliography

FAJMAN, David, MALIBORSKI, Maciej, OFNER, Maximilian, et al. Phase transition between shock formation and stability in cosmological fluids. Classical and Quantum Gravity, 2025, vol. 42, no 14, p. 14LT01. - https://doi.org/10.1088/1361-6382/ade929
FAJMAN, David, OFNER, Maximilian, OLIYNYK, Todd, et al. Stability of fluids in spacetimes with decelerated expansion. arXiv preprint arXiv:2501.12798, 2025. - https://doi.org/10.48550/arXiv.2501.12798

MSC codes

Last related questions on MathOverflow

You have to connect your Carmin.tv account with mathoverflow to add question

Ask a question on MathOverflow

All the collection videos

40:34

published on May 21, 2026

A new phase transition in cosmological fluid dynamics

By Zoe Wyatt

40:31

published on May 21, 2026

Non-self-adjoint operators and black hole ring-down

By Claude Warnick

36:25

published on May 21, 2026

Stability analysis of a quantum dissipative system

By Simona Rota Nodari

$Jumps, cusps and fractals in the solution of dispersive equations$
40:48

published on May 21, 2026

Jumps, cusps and fractals in the solution of dispersive equations

By Beatrice Pelloni

38:45

published on May 21, 2026

Non-selfadjoint operators in gravity: two case studies

By José Luis Jaramillo

Copyright Carmin.tv 2026

Give feedback