Abstract :  The inflationary scenario has become the standard

paradigm of early universe cosmology, but it is not
the only scenario which can explain the currently
available data on the large-scale structure of the
universe. I will compare inflation with two alternative
scenarios, the "Ekpyrotic bounce" scenario, and
"String Gas Cosmology". I will then argue that
there are severe obstacles to embed inflationary
cosmology into quantum gravity, and that the
alternative scenarios may be more promising"  

Zoom link: https://uky.zoom.us/j/94475622713

Recording: https://uky.zoom.us/rec/play/uZcvJryspjM3T4aRtASDVvIvW42-La6sh3IZ_aUEn0…

We derive the Ward identities originated from general linear transformations for the systems with time translation invariance. They connect various transport coefficients for 2+1 dimensional systems with broken parity. Our general results agree with the available relations in incompressible Hall fluid and in magnetically charged black holes. The talk is organized to give a broad picture for the subject.