Commentary on Proposition VIII.16

Back to Proposition VIII.16.

[Folio 0376 | p. 370]

If $a^2$ does not measure $b^2$, $a$ will not measure $b$; and, if $a$ does not measure $b$, $a^2$ will not measure $b^2$.

The proof is a mere reductio ad absurdum using VIII. 14.