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pseudo-connection, 42“52, 85“90, 103 transformation, 39“40
pseudosphere, 23
tautological 1-form, 38, 42“50, 85
pseudospherical line congruence, 192“
time-orientation, 80
195
torsion
Ricci curvature, 95 absorption of, 44“45, 85
INDEX 205

intrinsic, of a G-structure, 44,
46“47, 87
normalization of, 46, 85, 87“88
of a pseudo-connection, 43“52,
85“90, 103
total derivative, 10
transformation
classical, vii, 101, 154
contact, viii, 16“17, 26“27, 56“
57, 151“155
gauge, vii, 154
point, viii, 26, 57, 151“155
translation, 27, 33, 84, 115

wave equation, 20
conformally invariant, 118“131
homogeneous, 39, 51
non-linear, 79, 118“131
wave operator, 118
conformal, 120
weak local minimum, 145“149
Weierstrass excess function, 148“149
Weierstrass representation, 32
Weingarten equation, ix, 13, 26“27,
182
Weyl tensor, 92, 106

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