A

Abelian groups, 517

Absorption, neutron, 2 , 3 , 13 , 21 , 22 , 24 , 25

Acceleration, 167 , 168 -171, 174

Active material, 18 , 21 , 22 , 24 , 25 , 34

ADAM, 431 , 432 -433, 436 , 444

Additive processes, 1

Adiabatic equation, 124

Algebra, 144 ;

Boolean, 348 -349, 446 , 479 , 480 , 481 , 482 , 491 , 494 , 498 , 518 , 520 ;

cylindric, 480 , 496 , 520 ;

pattern, 492 , 494 , 496 (see also Relational structures);

polyadic, 480 ;

projective, 480 -481, 496 , 520 ;

relation, 492 -496

American Philosophical Society, xii

Amino acids, 466 , 469 , 470 , 471 , 472

Analogy, ix , x , 514 -518;

analogies between, 513 , 518 ;

and complexity, 518 ;

criteria for, 514 ;

distance measures, 483 , 485 , 489 ;

transformations preserve, 523

Appell, Paul-Emile, 516 n, 530

Arithmetic:

complexity, 445 -463;

multiprecision, 353 n, 357 n;

significance, 483

Artificial intelligence, 466

Automatic plotting devices, 301 , 303 . See also Oscilloscope

Automorphism, 492

Autonomous systems, 344