For some reason i could not find a working example on the theory of betweenness.What does betweenness mean when we are talking in terms of ordering problem ?
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1See Betweenness. – Mauro ALLEGRANZA Oct 26 '18 at 12:32
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Let $\leq$ be a ordering on a set $X$. Then $b$ is between $a$ and $c$ iff $a\leq b\leq c$. – Wuestenfux Oct 26 '18 at 12:33