### Biography

The**arithmetic mean**$z$ of numbers $x$ and $y$ satisfies $z=\large\frac{1}{2}\normalsize (x+y)$.

In §1, I discuss

### References (show)

- G G Joseph,
*The crest of the peacock*(London, 1991).

In §1, I discuss

- G G Joseph,
*The crest of the peacock*(London, 1991).