Definition:Subtraction/Rational Numbers
< Definition:Subtraction(Redirected from Definition:Rational Subtraction)
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Definition
Let $\struct {\Q, +, \times}$ be the field of rational numbers.
The operation of subtraction is defined on $\Q$ as:
- $\forall a, b \in \Q: a - b := a + \paren {-b}$
where $-b$ is the negative of $b$ in $\Q$.