Path Integral

Path integral may refer to:

  • Line integral, the integral of a function along a curve
  • Functional integration, the integral of a functional over a space of curves
  • Path integral formulation of quantum mechanics using functional integration, due to Richard Feynman

Famous quotes containing the words path and/or integral:

    “Tired,
    she looked up the path
    her lover would take
    as far as her eyes could see.
    On the roads,
    traffic ceased
    at the end of day
    as night slid over the sky.
    The traveller’s pained wife
    took a single step towards home,
    said, “Could he not have come at this instant?”
    and quickly craning her neck around,
    looked up the path again.”
    —Amaru (c. seventh century A.D.)

    “An island always pleases my imagination, even the smallest, as a small continent and integral portion of the globe. I have a fancy for building my hut on one. Even a bare, grassy isle, which I can see entirely over at a glance, has some undefined and mysterious charm for me.”
    —Henry David Thoreau (1817–1862)