Symbols:Abbreviations/P

PCI

 * Principle of Complete Induction (or Principle of Complete Finite Induction).

PCFI

 * Principle of Complete Finite Induction.

PDE

 * Partial differential equation.

PFI

 * Principle of Finite Induction.

PGF or p.g.f.

 * Probability generating function.

PMF or p.m.f.

 * Probability mass function.

PMI

 * Principle of Mathematical Induction.

PNT

 * Prime Number Theorem.