The set of all points 
that can be put into one-to-one correspondence
with sets of essentially distinct values of four homogeneous coordinates 
, not all simultaneously zero, which are connected
by the relation
 |
Tetracyclic Plane
See also
Pentaspherical SpaceExplore with Wolfram|Alpha
References
Coolidge, J. L. "Pentaspherical Space." Ch. 7 in A Treatise on the Geometry of the Circle and Sphere. New York: Chelsea, pp. 282-305, 1971.Referenced on Wolfram|Alpha
Tetracyclic PlaneCite this as:
Weisstein, Eric W. "Tetracyclic Plane." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/TetracyclicPlane.html