David Eppstein - Publications

• Tangent spheres and triangle centers.
  D. Eppstein.
  arXiv:math.MG/9909152.
  Amer. Math. Monthly 108(1):63-66, 2001.

  Any four mutually tangent spheres determine three coincident lines through opposite pairs of tangencies. As a consequence, we define two new triangle centers. These centers arose as part of a compass-and-straightedge construction of Soddy circles; also available are some Mathematica calculations of trilinear coordinates for the new triangle centers.

  (BibTeX -- Citations -- CiteSeer)

Publications -- David Eppstein -- Theory Group -- Inf. & Comp. Sci. -- UC Irvine

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