Any Symmetric Matrix (
) or Skew Symmetric Matrix (
)
with
diagonal elements 0 and others satisfying

where

**References**

Ball, W. W. R. and Coxeter, H. S. M. *Mathematical Recreations and Essays, 13th ed.* New York: Dover, pp. 308-309, 1987.

© 1996-9

1999-05-26