Question Number 116767 by bounhome last updated on 06/Oct/20
$${if}\:\:{A}×{B}=\mathrm{0}\:{how}\:{to}\:{prove}\:{A}=\mathrm{0}\:{or}\:{B}=\mathrm{0} \\ $$
Commented by Bird last updated on 07/Oct/20
$${not}\:{correct}\:{in}\:{Z}/\mathrm{2}{Z} \\ $$