Parameter, 141
Parameters, variation of, 322
for linear systems, 485
nonlinear, 544
Periodic function, 597
Permutation, 668
Phase angle, 305
Phase diagram, 88
position-velocity, 539
Physical units, 13
Picard, Emile (1856–1941), 654
Piecewise continuous function, 561
jump, 562
Piecewise smooth function, 568
Pivot columns of a matrix, 245
Polar form of a complex number, 298
Polluted reservoir, 55
interpolating, 204
Polynomial differential operator, 293
Population equation, 76
Population vector, 356
Position function, 11
Position vector, 373
Power series, 604
Power series representation, 605
Practical resonance, 333
Predation, 534
Predictor-corrector methods, 120
Principal diagonal, 162
Principle of superposition:
Product:
Proper subspace, 219
Pseudofrequency, 308
Pseudoperiod, 308
Pythagorean formula, 253
3.137.188.120