73
. Overbye, 290.
74
. Einstein, “On the General Theory of Relativity (Addendum),” Nov. 11, 1915, CPAE 6: 22; Renn and Sauer 2006, 276; Pais 1982, 252.
75
. Einstein to David Hilbert, Nov. 12, 1915.
76
. Einstein to Hans Albert Einstein, Nov. 15, 1915; Einstein to Mileva Mari
, Nov. 15, 1915; Einstein to Heinrich Zangger, Nov. 15, 1915 (released in 2006 and printed in supplement to vol. 10).
77
. Einstein to David Hilbert, Nov. 15, 1915.
78
. Einstein, “Explanation of the Perihelion Motion of Mercury from the General Theory of Relativity,” Nov. 18, 1915, CPAE 6: 24.
79
. Pais 1982, 253; Einstein to Paul Ehrenfest, Jan. 17, 1916; Einstein to Arnold Sommerfeld, Dec. 9, 1915.
80
. Einstein to David Hilbert, Nov. 18, 1915.
81
. David Hilbert to Einstein, Nov. 19, 1915.
82
. The equation has been expressed in many ways. The one I use follows the formulation Einstein used in his 1921 Princeton lectures. The entire left-hand side of the equation can be expressed more compactly as what is now known as the Einstein tensor: G
??
.
83
. Overbye, 293; Aczel 1999, 117; archive.ncsa.uiuc.edu/Cyberia/NumRel/Ein steinEquations.html#intro. A variation of Wheeler’s quote is on p. 5 of the book he coauthored with Charles Misner and Kip Thorne,
.
84
. Greene 2004, 74.
85
. Einstein, “The Foundations of the General Theory of Relativity,”
(Mar. 20, 1916), CPAE 6: 30.
86
. Einstein to Heinrich Zangger, Nov. 26, 1915; Einstein to Michele Besso, Nov. 30, 1915.
87
. Thorne, 119.
88
. For an analysis of Hilbert’s contribution, see Sauer 1999, 529–575; Sauer 2005, 577–590. Papers describing Hilbert’s revisions include Corry, Renn, and Stachel; Sauer 2005. For a flavor of the controversy, see also John Earman and Clark Glymour, “Einstein and Hilbert:Two Months in the History of General Relativity,”
(1978): 291; A. A. Logunov, M. A. Mestvirishvili, and V. A. Petrov, “How Were the Hilbert-Einstein Equations Discovered?,”
174, no. 6 (June 2004): 663–678; Christopher Jon Bjerknes,
