Page numbers are for draft copy at present; they will be replaced with correct numbers when final book is formatted. Chapter numbers are correct and will not change now.
A value is optimal if it is the best by some measure or optmisation criterion.
Used in Chap. 4: pages 41, 52, 54, 56; Chap. 7: page 107; Chap. 8: page 116; Chap. 9: pages 132, 136, 140; Chap. 10: page 153; Chap. 19: page 326
Also known as optimality
