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 Space## Explore 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 Plane## Cite this as:

Weisstein, Eric W. "Tetracyclic Plane."
From *MathWorld*--A Wolfram Web Resource. https://mathworld.wolfram.com/TetracyclicPlane.html