It is R, which stands for Real. Really!
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There is no special symbol.The set of rational numbers is denoted by Q and the set of real numbers by R so one option is R - Q.
In a certain sense, the set of complex numbers is "larger" than the set of real numbers, since the set of real numbers is a proper subset of it.
what symbol do you use when you automatically want to add a set of numbers together? the plus symbol + ?
Real numbers are a proper subset of Complex numbers.
Are disjoint and complementary subsets of the set of real numbers.