Step
*
of Lemma
sq_stable__and
∀[P:ℙ]. ∀[Q:⋂p:P. ℙ]. (SqStable(P)
⇒ (P
⇒ SqStable(Q))
⇒ SqStable(P ∧ Q))
BY
{ (Auto THEN (D 0 THENA (Auto THEN Fold `prop` 0 THEN RenameVar `p' (-1) THEN With ⌜p⌝ (D 2)⋅ THEN Auto))) }
1
1. [P] : ℙ
2. [Q] : ⋂p:P. ℙ
3. SqStable(P)@i
4. P
⇒ SqStable(Q)@i
5. ↓P ∧ Q@i
⊢ P ∧ Q
Latex:
Latex:
\mforall{}[P:\mBbbP{}]. \mforall{}[Q:\mcap{}p:P. \mBbbP{}]. (SqStable(P) {}\mRightarrow{} (P {}\mRightarrow{} SqStable(Q)) {}\mRightarrow{} SqStable(P \mwedge{} Q))
By
Latex:
(Auto
THEN (D 0 THENA (Auto THEN Fold `prop` 0 THEN RenameVar `p' (-1) THEN With \mkleeneopen{}p\mkleeneclose{} (D 2)\mcdot{} THEN Auto))
)
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