Step
*
2
of Lemma
subtype-fpf-cap-top
1. T : Type
2. X : Type
3. eq : EqDecider(X)
4. f : x:X fp-> Type
5. g : x:X fp-> Type
6. x : X
7. g ⊆ f
8. ¬↑x ∈ dom(f)
9. ↑x ∈ dom(g)
10. x1@0 : T@i
⊢ x1@0 ∈ g(x)
BY
{ ((Unfold `fpf-sub` (-4)) THEN (InstHyp [⌈x⌉] (-4))⋅ THEN ExRepD THEN Auto) }
Latex:
1. T : Type
2. X : Type
3. eq : EqDecider(X)
4. f : x:X fp-> Type
5. g : x:X fp-> Type
6. x : X
7. g \msubseteq{} f
8. \mneg{}\muparrow{}x \mmember{} dom(f)
9. \muparrow{}x \mmember{} dom(g)
10. x1@0 : T@i
\mvdash{} x1@0 \mmember{} g(x)
By
((Unfold `fpf-sub` (-4)) THEN (InstHyp [\mkleeneopen{}x\mkleeneclose{}] (-4))\mcdot{} THEN ExRepD THEN Auto)
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