398 Index
union, 3
unit
normal vector, 352
tangent vector, 327
vector, 243
universal set, 4
upper
bound, 23
integral, 104, 278
sum, 102, 277
vanishing derivative, 91
variable
change of, 241
dependent, 240
vector, 162
addition, 162
components, 162
normal, 352
tangent, 245
vector space, 162, 280
basis, 215
finite-dimensional, 215
infinite-dimensional, 385
linear subspace, 215
vector-matrix
notation, 209
product, 209
velocity field, 363
volume, 283
inner, 283
of a rectangle, 276
outer, 283
zero, 285
wedge product, 332
Weierstrass M-test, 147, 206
well ordering
for the natural numbers, 379
well-ordered set, 383
well-ordering principle, 15
Well-ordering Theorem, 384
Zermelo-Fraenkel axioms, 383
zero vector, 162
Zorn’s Lemma, 383
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