$\forall$$A$:Type, $B$, $C$:($A$$\rightarrow$Type), ${\it eq}$:EqDecider($A$), $f$:$a$:$A$ fp$\rightarrow$ $B$($a$), $g$:$a$:$A$ fp$\rightarrow$ $C$($a$).
\\[0ex]($\forall$$x$:$A$. ($\uparrow$$x$ $\in$ dom($f$)) $\Rightarrow$ ($\uparrow$$x$ $\in$ dom($g$)) $\Rightarrow$ ($B$($x$) $\subseteq$r $C$($x$))) $\Rightarrow$ ($f$ $\parallel$ $g$ $\in$ $\mathbb{P}$)