INDEX Absolute continuity, 120 of functions, 145 Absolute convergence, 116 Absolutely convergent Fourier series, 367 Addition formula, 1 Affine transformation, 377 Ahlfors, L. V., 402 Algebra, 356 of measures, 175 of sets, 10 Algebraically closed field, 213 Almost everywhere, 27 Almost periodic function, 94 Almost uniform convergence, 214 Analytic continuation, 323, 377, 379 Analytic function, 197 Annulus, 229, 264, 292 Approach region, 240 Area, 250 Area theorem, 286 Arens, R., 398 Argument, 204 Arithmetic mean, 63 Arzela-Ascoli theorem, 245 Associative law, 18 Asymptotic value, 265 Austin, D., 399 Average, 30 Axiom of choice, 396 Baire's theorem, 97 Balanced collection, 268 Ball,9 Banach, S" 105 Banach algebra, 190, 356 Banach space, 95 Banach-Steinhaus theorem, 98 Bessel's inequality, 85, 260 Beurling, A., 335, 402 Beurling's theorem, 348 Bieberbach conjecture, 401 Blaschke product, 310, 317, 318, 338, 353 Bledsoe, W. W., 399 Borel, E., 5, 402 Borel function, 12 Borel measure, 47 Borel set, 12 Borel transform, 402 Boundary, 108,202,289 Bounded function, 66 Bounded linear functional, 96, 113, 127, 130 Bounded linear transformation, 96 Bounded variation, 117, 148, 157 Box, 50 Brouwer's fixed point theorem, 151 Calderon, A. P., 401, 402 Cancellation law, 19 Canonical product, 302 Cantor, D. G., 401 Cantor set, 58, 145 Caratheodory, c., 397,400,401 Carleson, L., 398 Carrier, 58 409
410 INDEX Cartesian product, 7,160 Category theorem, 98 Cater, F. S., 398 Cauchy, A., 400 Cauchy formula, 207, 219, 229, 268, 341, 384, 388 Cauchy-Riemann equations, 232 Cauchy sequence, 67 Cauchy theorem, 205, 206, 207, 218 Cauchy's estimates, 213 Cell, SO Chain, 218 Chain rule, 197 Change of variables, 153, 156 Character, 179 Characteristic function, 11 Choice function, 396 Class, 6 Closed curve, 200 Closed graph theorem, 114 Closed path, 201 Closed set, 13, 35 Closed subspace, 78 Closure, 35 Cohen, P. J., 402 Collection, 6 Commutative algebra, 356 Commutative law, 18 Compact set, 35 Complement, 7 Complete measure, 28 Complete metric space, 67 Completion: of measure space, 28, 168 of metric space, 70, 74 <strong>Complex</strong> algebra, 356 <strong>Complex</strong> field, 213, 359 <strong>Complex</strong> homomorphism, 191,362 <strong>Complex</strong>-linear functional, 105 <strong>Complex</strong> measure, 16, 116 <strong>Complex</strong> vector space, 33 Component, 197 Composite function, 7 Concentrated, 119 Conformal equivalence, 282 Conjugate exponents, 63 Conjugate function, 3SO Connected set, 196 Continuity, 8, 9 Continuous function, 8 Continuous linear functional, 81, 96, 113, 127, 130 Continuous measure, 175 Continuum hypothesis, 167 Convergence: dominated, 26 in IJ, 67 in measure, 74 monotone, 21 almost uniform, 214 uniform on compact subsets, 214 weak,245 Convex function, 61 Convex sequence, 410 Convex set, 79 Convexity theorem, 257 Convolution, 170, 175, 178 Coset, 362 Cosine, 2, 265 Countable additivity, 6,16 Counting measure, 17 Cover, 35, 324 Covering lemma, 137,399 Curve, 200 with orthogonal increments, 94 Cycle, 218 Daniell, P. J., 398 de Branges, L., 401 Denjoy, A., 144 Denjoy-Carleman theorem, 380 Dense set, 58 Derivative, 135, 197 of Fourier transform, 179 of function of bounded variation, 157 of integral, 141 of measure, 136, 142, 143, 241 symmetric, 136 of transformation, ISO Determinant, 54 Diagonal process, 246 Dieudonne, J., 398 Differentiable transformation, 150 Differential, ISO Direct continuation, 323 Dirichlet kernel, 101 Dirichlet problem, 235 Disc,9,196 Discrete measure, 175 Disjoint sets, 7 Distance function, 9 Distribution function, 172 Distributive law, 18 Division algebra, 360. Dixon, J. D., 400 Domain, 7 Dominated convergence theorem, 26, 29, 180
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