Conversely, If a cone be such that its tangent If a cone be such that the planes plane, passing through any side, in- passing through two fixed axes and tersects two fixed planes in two through any side whatever, make right lines, making equalanbsp;...

Title | : | Two geometrical memoirs on the general properties of cones of the second degree, and on the spherical conics |

Author | : | Michel Chasles |

Publisher | : | - 1841 |

Continue