246 INDEX
edges of, 115
special edge of, 125
Twist, 33
Universality, 127
Upper bound, 44
Valuation, 42
Vertex
black, 142, 175
boundary, 142, 175
white, 142, 175
Weight
fundamental, 5
lattice, 5
map, 149
Weil-Petersson form, 114, 119
Weyl
function, 200
group, 5
element length, 5
longest element, 5
Whitehead move, 16, 116
allowed, 118
spun, 125
Yang-Baxter equation (modified classical,
MCYBE), 10
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