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The Gauge Problem in Cosmology

ARC Seminar 31 July 2020: Rituparno Goswami, UKZN Abstract: This is a pedagogical talk about whats, whys and hows about gauge fixing and interpreting results in gauge-invariant ways. The Astrophysics Research Centre (ARC) is part of the College of Agriculture, Engineering and Science at the University of KwaZulu-Natal (UKZN). We strive to be a world-class centre of excellence for research and postgraduate training in astrophysics and related data-intensive science. WATCH NEXT: ○ Classical offset Gregorian versus symmetric prime focus reflector antenna for 21cm intensity mapping -    • Classical offset Gregorian versus sym...   ○ Toward an antenna figure-of-merit for intensity mapping science extraction -    • Toward an antenna figure-of-merit for...   ○ Learning From Data: Accomplishing Hard To Define Tasks With Neural Nets -    • Learning From Data: Accomplishing Har...   ○ The Gauge Problem in Cosmology -    • The Gauge Problem in Cosmology   ○ Understanding the Planetary Systems of our Smallest, Nearest Neighbors of the Lowest-Mass Stars -    • Understanding the Planetary Systems o...   ○ (Some of) what you can do with massive galaxy clusters -    • (Some of) what you can do with massiv...   ○ HIRAX: 21 cm cross-correlations and calibration -    • HIRAX: 21 cm cross-correlations and c...   ○ The GLEAM 4-Jy (G4Jy) Sample: the brightest radio-sources in the southern sky -    • The GLEAM 4-Jy (G4Jy) Sample: the bri...   ○ A radiating spacetime in modified gravity -    • A radiating spacetime in modified gra...   ○ Fast Radio Bursts (FRB) as a probe of the intergalactic medium -    • Fast Radio Bursts (FRB) as a probe of...   ○ Subscribe to our channel    / @astrophysicsresearchcentre8943   ○ Like us on Facebook   / astrophysicsresearchcentre   ○ Read our tweets on twitter   / arc_ukzn   ○ Follow us on Instagram   / astrophysicsresearchcentre   ○ Visit our Website https://astro.ukzn.ac.za