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PRODID:Faculty of Science and Engineering - Research
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SUMMARY:GAnG Seminar: Maximilian Ofner  Shock formation in decelerated spacetimes
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Shock formation in decelerated spacetimes=0D=0A=
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In cosmological models the matter content of the universe is assumed to be a compressible fluid. Such fluids are prone to the formation of so-called shock singularities, meaning that, at a finite time, the fluid gradient blows up, while the fluid quantities themselves stay bounded. By contrast, rapidly expanding spacetimes facilitate stabilization of any fluid contained inside. This dichotomy raises the question: What amount of expansion is sufficient to prevent shocks forming for sufficiently small data? At the beginning of this talk, we will discuss the preliminaries of relativistic fluids as an initial value problem. Afterwards, I will present new results in the regime of decelerated expansion, which seek to answer this central question. This is joint work with Todd Oliynyk. 
LOCATION:MB503
DTSTART:20261027T140000
DTEND:20261027T153000
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