Gibbons-Hawking-York Boundary Term Definition
In general relativity , a term that needs to be added to the Einstein-Hilbert action when the underlying spacetime manifold has a boundary.
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Origin of Gibbons-Hawking-York Boundary Term
The necessity of such a boundary term was first realised by James W. York and later refined in a minor way by Gary Gibbons and Stephen Hawking .
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