# 2019 CAP Congress / Congrès de l'ACP 2019

2-7 June 2019
Simon Fraser University
America/Vancouver timezone
Welcome to the 2019 CAP Congress Program website! / Bienvenue au siteweb du programme du Congrès de l'ACP 2019 !

## 23 - Discrete Self-Similar Solutions in Bianchi-IX Spacetimes

Jun 4, 2019, 4:49 PM
2m
SWH 9082 + AQ South-East Corner / coin sud-est (Simon Fraser University)

### SWH 9082 + AQ South-East Corner / coin sud-est

#### Simon Fraser University

Poster (Non-Student) / Affiche (Non-étudiant(e)) Theoretical Physics / Physique théorique (DTP-DPT)

### Speaker

Dr David Hobill (University of Calgary)

### Description

It is known that the Friedmann-Robertson-Walker cosmologies exhibit continuous self-similarity. In addition critical gravitational collapse with non-zero energy momentum tensor sources in asymptotically flat space-times are discretely self-similar. It will be shown that discrete self-similarity can arise in the evolution of spatially homogeneous but anisotropic vacuum cosmological models.

The lowest order self-similarity is associated with period-3 oscillations which indicate that the generic time dependence will be chaotic. These solutions also lead to parameters that are related to the golden ratio. Self similar oscillations also exist with higher periodicities and these are thought to lead to parameters related to the so-called silver ratios".

### Primary author

Dr David Hobill (University of Calgary)

### Presentation materials

There are no materials yet.