I’m sorry this statement is so blatantly wrong that’s probably why he italicized it. The physical object in question is not a four-dimensional Riemann manifold it doesn’t even sound right.

Published by Jas, the Physicist

My current interest is flows: flowing on a beat, flowing along a manifold, flows on the electromagnetic spectrum, flow curves, flows of a vector field, the flow of time, time as currency, the flow of electrons: currency, like electric currents, electric daisies, current interest rates, current events, swimming against the current, fluid flow, flux and divergence... you know... flowers.