Metamath Proof Explorer


Theorem cdleme43frv1snN

Description: Value of [_ R / s ]_ N when -. R .<_ ( P .\/ Q ) . (Contributed by NM, 30-Mar-2013) (New usage is discouraged.)

Ref Expression
Hypotheses cdlemefr27.b ⊢ B = Base K
cdlemefr27.l ⊢ ≤ ˙ = ≤ K
cdlemefr27.j ⊢ ∨ ˙ = join ⁡ K
cdlemefr27.m ⊢ ∧ ˙ = meet ⁡ K
cdlemefr27.a ⊢ A = Atoms ⁡ K
cdlemefr27.h ⊢ H = LHyp ⁡ K
cdlemefr27.u ⊢ U = P ∨ ˙ Q ∧ ˙ W
cdlemefr27.c ⊢ C = s ∨ ˙ U ∧ ˙ Q ∨ ˙ P ∨ ˙ s ∧ ˙ W
cdlemefr27.n ⊢ N = if s ≤ ˙ P ∨ ˙ Q I C
cdleme43fr.x ⊢ X = R ∨ ˙ U ∧ ˙ Q ∨ ˙ P ∨ ˙ R ∧ ˙ W
Assertion cdleme43frv1snN ⊢ R ∈ A ∧ ¬ R ≤ ˙ P ∨ ˙ Q → ⦋ R / s⦌ N = X

Proof

Step Hyp Ref Expression
1 cdlemefr27.b ⊢ B = Base K
2 cdlemefr27.l ⊢ ≤ ˙ = ≤ K
3 cdlemefr27.j ⊢ ∨ ˙ = join ⁡ K
4 cdlemefr27.m ⊢ ∧ ˙ = meet ⁡ K
5 cdlemefr27.a ⊢ A = Atoms ⁡ K
6 cdlemefr27.h ⊢ H = LHyp ⁡ K
7 cdlemefr27.u ⊢ U = P ∨ ˙ Q ∧ ˙ W
8 cdlemefr27.c ⊢ C = s ∨ ˙ U ∧ ˙ Q ∨ ˙ P ∨ ˙ s ∧ ˙ W
9 cdlemefr27.n ⊢ N = if s ≤ ˙ P ∨ ˙ Q I C
10 cdleme43fr.x ⊢ X = R ∨ ˙ U ∧ ˙ Q ∨ ˙ P ∨ ˙ R ∧ ˙ W
11 8 9 10 cdleme31sn2 ⊢ R ∈ A ∧ ¬ R ≤ ˙ P ∨ ˙ Q → ⦋ R / s⦌ N = X