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I am excited to be learning about number sets again, :P.

Ok, so this is how I describe them:

N={1,2,3,4,5,6,7,8,9,10….∞} Z={-∞….-3,-2,-1,0,1,2,3…∞}

Q=a/b ,a∈Z,b∈{Z∖0}

The first three are correct. However, how do we describe irrational numbers? Is it just the difference set of Real - rational - integer - natural? or something else?

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# I Is this a correct way to describe number sets?

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