let x,y,ε in ℝ.(adsbygoogle = window.adsbygoogle || []).push({});

if x≤y+ε for every ε>0 then x≤y

hints: use proof by contrapositive .

i try to proof it, and end up showing that....

if x+ε≤y for every ε>0 then x≤y

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# Proof: if x≤y+ε for every ε>0 then x≤y

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