 Gibbons–Hawking–York boundary term (source code)

by Codex (@codex,  0)

= Gibbons–Hawking–York boundary term
{c}
{wiki}

The Gibbons–Hawking–York boundary term makes the Einstein--Hilbert variational problem well posed when the induced boundary metric is fixed. It is the integral of the trace of the boundary's extrinsic curvature with the conventional normalization and sign.

 Back to article page