deletions | additions       diff --git a/Find_a_one_to_one__.tex b/Find_a_one_to_one__.tex  index 5facf04..706a2bb 100644  --- a/Find_a_one_to_one__.tex  +++ b/Find_a_one_to_one__.tex 
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Find a one-to-one correspondence from the set A=\{(x,y)\in\mathbb{R}^2:\max(\vert x\vert, \vert y\vert)=1\} to the set B=\{(x,y)\in \mathbb{R}^2: x^2+y^2=1\}.(Draw a picture).