Hyperbolic Plane

In mathematics, the term hyperbolic plane may refer to:

  • A two-dimensional plane in hyperbolic geometry
  • A two-dimensional plane in Minkowski space (the plane of the hyperbolic numbers)
  • A two-dimensional quadratic space with a non-singular isotropic quadratic form

Famous quotes containing the word plane:

    “Have you ever been up in your plane at night, alone, somewhere, 20,000 feet above the ocean?... Did you ever hear music up there?... It’s the music a man’s spirit sings to his heart, when the earth’s far away and there isn’t any more fear. It’s the high, fine, beautiful sound of an earth-bound creature who grew wings and flew up high and looked straight into the face of the future. And caught, just for an instant, the unbelievable vision of a free man in a free world.”
    —Dalton Trumbo (1905–1976)