Dear Colleagues and Students,
You are cordially invited to the Applied Mathematics Seminar organized by the Department of Mathematics.
Speaker: Bayram Tekin (METU)
“NON-STATIONARY ENERGY IN GENERAL RELATIVITY”
Abstract: Using the time evolution equations of (cosmological) General Relativity in the first order Fischer-Marsden form, we construct an integral that measures the amount of non-stationary energy on a given spacelike hypersurface in D dimensions. The integral vanishes for stationary spacetimes; and with a further assumption, reduces to Dain’s invariant on the boundary of the hypersurface which is defined with the Einstein constraints and a fourth order equation defining approximate Killing symmetries.
Date: November 28, 2019
Time: 14:40
Place: SA – 141