Q
QR algorithm, 283 , 894
QR decomposition, 894
quadrangle, 134 , 136
--- circumscribing, 136
--- concave, 136
--- convex, 136
--- inscribed, 136
quadrant relations, trigonometric functions, 77
quadrant, Cartesian coordinates, 189
quadratic
--- curve, 205
--- surface, 223
quadratic form
--- first fundamental, of a surface, 245
--- index of inertia, 282
--- real positive definite, 282
--- second fundamental, surface, 248
--- transformation
--- principal axis, 281
quadrature formula, 898
--- Gauss type, 900
--- Hermite, 899
--- integral equation, 572
--- interpolation quadrature, 899
--- Lobatto type, 901
quadruple (ordered four-tuple), 294
quantification, restricted, 290
quantifier, 289
quantile, 752
quantity, infinitesimal, 441 , 447
quantum number, 541
--- energy, 541
--- magnetic, 544
--- orbital angular momentum, 543
--- vibration quantum number, 546
quartic, 96
quasiperiodic, 806
queuing, 769
--- theory, 769
quintuple (ordered 5 -tuple), 294
quotient, 1 , 12
--- derivative, 382
--- differential, 379
--- set, 297
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