Probability Density

Probability density may refer to:

  • Probability density function in probability theory
  • The product of the probability amplitude with its complex conjugate in quantum mechanics

According to quantum mechanics, these two are the same thing.

Famous quotes containing the word probability:

    “The source of Pyrrhonism comes from failing to distinguish between a demonstration, a proof and a probability. A demonstration supposes that the contradictory idea is impossible; a proof of fact is where all the reasons lead to belief, without there being any pretext for doubt; a probability is where the reasons for belief are stronger than those for doubting.”
    —Andrew Michael Ramsay (1686–1743)