The

**basic rational closed unit interval**is the D11: Set \begin{equation} [0, 1] : = \{ q \in \mathbb{Q} : 0 \leq q \leq 1 \} \end{equation}

▾ Set of symbols

▾ Alphabet

▾ Deduction system

▾ Theory

▾ Zermelo-Fraenkel set theory

▾ Set

▾ Binary cartesian set product

▾ Binary relation

▾ Binary endorelation

▾ Preordering relation

▾ Partial ordering relation

▾ Partially ordered set

▾ Closed interval

▾ Closed real interval

▾ Closed real unit interval

▾ Alphabet

▾ Deduction system

▾ Theory

▾ Zermelo-Fraenkel set theory

▾ Set

▾ Binary cartesian set product

▾ Binary relation

▾ Binary endorelation

▾ Preordering relation

▾ Partial ordering relation

▾ Partially ordered set

▾ Closed interval

▾ Closed real interval

▾ Closed real unit interval

Formulation 0

Let $P = (\mathbb{Q}, {\leq})$ be the D1100: Ordered set of rational numbers.

The**basic rational closed unit interval** is the D11: Set
\begin{equation}
[0, 1]
: = \{ q \in \mathbb{Q} : 0 \leq q \leq 1 \}
\end{equation}

The