Missing Muse

In quantum mechanics, the black hole emits Hawking radiation, and so can come to thermal equilibrium with a gas of radiation. Since a thermal equilibrium state is time reversal invariant, Stephen Hawking argued that the time reverse of a black hole in thermal equilibrium is again a black hole in thermal equilibrium.[1] This implies that black holes and white holes are the same object. The Hawking radiation from an ordinary black hole is then identified with the white hole emission. Hawking’s semi-classical argument is reproduced in a quantum mechanical AdS/CFT treatment,[2] where a black hole in anti-de Sitter space is described by a thermal gas in a gauge theory, whose time reversal is the same as itself.

— From the Wikipedia article on White Holes. Quoth my friend: “…is as close to incomprehensible mathematical symbols as i’ve ever seen plain text get.”