Preorderβ βAβ βR\textbf{Preorder} \; A \; RPreorderAR
Preorderβ βBβ βS\textbf{Preorder} \; B \; SPreorderBS
FunctionΒ AΒ Bβ βf\textbf{Function A B} \; fFunctionΒ AΒ Bf
R;fβf;SR;f \subseteq f ; SR;fβf;S
pred MonotoneMap(A,B: set univ, R,S,f: univ->univ) { Preorder[A,R] Preorder[B,S] Function[A,B,f] R.f in f.S }
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