Saint Andrew's Cross

$\begin{figure}\begin{center}\BoxedEPSF{SaintAndrewsCross.epsf}\end{center}\end{figure}$

A Greek Cross rotated by 45°, also called the crux decussata. The Multiplication Sign $\times$ is based on Saint Andrew's cross (Bergamini 1969).

References

Bergamini, D. Mathematics. New York: Time-Life Books, p. 11, 1969.