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The Princeton Companion to Mathematics by Imre Leader, June Barrow-Green, Timothy Gowers

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parallel computation, 587, 603

parallel postulate, 42, 84–88, 90, 94

parity function, 588

partial derivative, 33

partial differential equations (PDEs), 34–35, 187, 455–83, 681–82, 993–94; criticality of, 479–80; dispersive, 236, 468, 471; elliptic, 468–71, 681–83; fully nonlinear, 462; homogeneous linear, 457; hyperbolic, 468–70, 490; inhomogeneous linear, 457–58; linear, 51, 458, 471–72; local solvability of, 471; nonlinear, 457; order of, 461; parabolic, 468, 470–71; quasilinear, 462; regular, 480, 482; semilinear, 462; subcritical, 479–80, 482; supercritical, 479–80, 482; symbols of, 682–83

partial differential operators, 239

partition functions, 62, 529, 667, 669

partitions: of natural numbers, 555, 797, 807, 994–95; of sets, 558

Pascal, ...

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