Symbols:Q

Probability

 * $q$

Used in conjunction with the general probability $p$:
 * $q = 1 - p$

As such, $q$ is a real number such that:


 * $0 \le q \le 1$

and
 * $p + q = 1$

The Set of Rational Numbers

 * $\Q$

The set of rational numbers.

The Set of Non-Zero Rational Numbers

 * $\Q^*$

The set of non-zero rational numbers:
 * $\Q^* = \Q - \left\{{0}\right\}$.

The Set of Non-Negative Rational Numbers

 * $\Q_{\ge 0}$

The set of non-negative rational numbers:
 * $\Q_{\ge 0} = \left\{{x \in \Q: x \ge 0}\right\}$.

Deprecated

 * $\Q_+$

The set of non-negative rational numbers:
 * $\Q_{/ge 0} = \left\{{x \in \Q: x \ge 0}\right\}$.

The Set of Strictly Positive Rational Numbers

 * $\Q_{> 0}$

The set of strictly positive rational numbers:
 * $\Q_{> 0} = \left\{{x \in \Q: x > 0}\right\}$.

Deprecated

 * $\Q_+^*$

The set of strictly positive rational numbers:
 * $\Q_+^* = \left\{{x \in \Q: x > 0}\right\}$.

{{LatexFor|for=\Q_+^*|code2=\mathbb Q_+^*}|code3=\Bbb Q_+^*}}