I need to get an rough idea about the definition of a side
I think in topology mobius strip has only one side and a piece of paper has two side
my problems are
(1) if I take a paper and simply bend it as a L shape how many side does it have is it 2 or 4?
(2) ok using a paper we can build one side object(mobius strip). By using a paper can we construct an object that has more than two side without cleaving it (mathematically)?