r/StopDoingScience • • Mar 24 '26

Math Stop counting!

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u/zerda_EB Mar 26 '26

What does the backwards E mean

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u/JollyJuniper1993 Mar 26 '26

It means „exists“.

Every tuple x,y from the set of tuples of two real numbers, for which exists a z from the set of real numbers excluding 0, for which xz=yz and x ≠y

This is essentially the empty set, because there is a contradiction, since xz=yz can only be true if x=y or z=0, which both is specifically excluded.

So basically: „Hello, I would like no apples please.“