title: Finding intersection points between 3 spheres
body: <p>I'm looking for an algorithm to find the common intersection points between 3 spheres.</p>
  <p>Baring a complete algorithm, a thorough/detailed description of the math would be greatly helpful.</p>
  <p>This is the only helpful resource I have found so far:
  <a href="https://web.archive.org/web/20170827085939/http://mathforum.org/library/drmath/view/63138.html" rel="nofollow noreferrer">http://mathforum.org/library/drmath/view/63138.html</a></p>
  <p>But neither method described there is detailed enough for me to write an algorithm on.</p>
  <p>I would prefer the purely algebraic method described in the second post, but what ever works.</p>