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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

$${not}\:{correct}\:{in}\:{Z}/\mathrm{2}{Z} \\ $$

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