468 Index torus knot, 25, 28 solid, 42 trivial range, xvii, 145 twice flat, 92, 404 two-sided, 350 unknotted, xv Unknotting Problem, xv, 196 Unknotting Theorems, 146, 165, 196, 199, 201, 212, 213, 215, 220, 240, 261, 264, 278, 279, 281, 358, 393 unlink, 28 unraveled at infinity, 284 upper half space, 1 vertically simple, 217 Vietoris-Begle Theorem, 9, 109, 435 Wang sequence, 276 Weak h-Cobordism Theorem, 105 Poincar´ e Theorem, 99 weakly flat, 78 wedge, 1 weight of a group, 283 Whitehead continuum, 111 group, 280, 281, 426, 433 link, 112, 211, 335 manifold, 112 Theorem, 17 Whitney trick, 195 wild at a point, 30, 32 Cantor set, 42, 169, 174, 421 embedding, xv mildly, 79 point, 51 set, 51 subspace, xv Zeeman engulfing, 105 Zeeman’s Unknotting Theorem, 210
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