3 ms·I'd love to see the proof. But you did not post your email address. Could you send it to mine?by cheese825 18y agoI'd love to see the proof. But you did not post your email address. Could you send it to mine?newt0311 18y agooops. Sorry about that. Fixed. PS. Your email address is not posted either.hhm 18y agoIsn't it something like this? 0=a-a, for all a (where a-a is actually, a+(-a)) so: mul(b,0)=mul(b,(a-a))=mul(b,a)-mul(b,a)=z-z=0newt0311 18y agopretty much.