Common notations

• Z=the set of integers = {…-3, -2, -1, 0, 1, 2, 3,…..}

• N=the set of natural numbers or nonnegative integers

• Z+=the set of positive integers

• Q=the set of rational numbers={a/b a,b is integer, b not zero}

• Q+=the set of positive rational numbers

• Q*=the set of nonzero rational numbers

• R=the set of real numbers

• R+=the set of positive real numbers

• R*=the set of nonzero real numbers

• C=the set of complex numbers

## Sunday, November 7, 2010

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