Definition:Between
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Definition
Let $\struct {S, \preceq}$ be an ordered set.
Let $a, b, c \in S$ such that $a \preceq b$ and $b \preceq c$.
Then $b$ is between $a$ and $c$.
Also see
Sources
- 1960: Paul R. Halmos: Naive Set Theory ... (previous) ... (next): $\S 14$: Order