Theorem cdlemg2fv

Description: Value of a translation in terms of an associated atom. cdleme48fvg with simpler hypotheses. TODO: Use ltrnj to vastly simplify. (Contributed by NM, 23-Apr-2013)

	Ref	Expression
Hypotheses	cdlemg2inv.h	$$⊢H=\mathrm{LHyp}\left(K\right)$$
	cdlemg2inv.t	$$⊢T=\mathrm{LTrn}\left(K\right)\left(W\right)$$
	cdlemg2j.l	$$⊢\underset{\dot{}}{\le }={\le }_K$$
	cdlemg2j.j	$$⊢\underset{\dot{}}{\vee }=\mathrm{join}\left(K\right)$$
	cdlemg2j.a	$$⊢A=\mathrm{Atoms}\left(K\right)$$
	cdlemg2j.m	$$⊢\underset{\dot{}}{\wedge }=\mathrm{meet}\left(K\right)$$
	cdlemg2j.b	$$⊢B={\mathrm{Base}}_K$$
Assertion	cdlemg2fv	$$⊢\left(\left(K\in \mathrm{HL}\wedge W\in H\right)\wedge \left(\left(P\in A\wedge \neg P\underset{\dot{}}{\le }W\right)\wedge \left(X\in B\wedge \neg X\underset{\dot{}}{\le }W\right)\right)\wedge \left(F\in T\wedge P\underset{\dot{}}{\vee }\left(X\underset{\dot{}}{\wedge }W\right)=X\right)\right)\to F\left(X\right)=F\left(P\right)\underset{\dot{}}{\vee }\left(X\underset{\dot{}}{\wedge }W\right)$$

Proof

Step	Hyp	Ref	Expression
1		cdlemg2inv.h	$$⊢H=\mathrm{LHyp}\left(K\right)$$
2		cdlemg2inv.t	$$⊢T=\mathrm{LTrn}\left(K\right)\left(W\right)$$
3		cdlemg2j.l	$$⊢\underset{\dot{}}{\le }={\le }_K$$
4		cdlemg2j.j	$$⊢\underset{\dot{}}{\vee }=\mathrm{join}\left(K\right)$$
5		cdlemg2j.a	$$⊢A=\mathrm{Atoms}\left(K\right)$$
6		cdlemg2j.m	$$⊢\underset{\dot{}}{\wedge }=\mathrm{meet}\left(K\right)$$
7		cdlemg2j.b	$$⊢B={\mathrm{Base}}_K$$
8		eqid	$$⊢\left(p\underset{\dot{}}{\vee }q\right)\underset{\dot{}}{\wedge }W=\left(p\underset{\dot{}}{\vee }q\right)\underset{\dot{}}{\wedge }W$$
9		eqid	$$⊢\left(t\underset{\dot{}}{\vee }\left(\left(p\underset{\dot{}}{\vee }q\right)\underset{\dot{}}{\wedge }W\right)\right)\underset{\dot{}}{\wedge }\left(q\underset{\dot{}}{\vee }\left(\left(p\underset{\dot{}}{\vee }t\right)\underset{\dot{}}{\wedge }W\right)\right)=\left(t\underset{\dot{}}{\vee }\left(\left(p\underset{\dot{}}{\vee }q\right)\underset{\dot{}}{\wedge }W\right)\right)\underset{\dot{}}{\wedge }\left(q\underset{\dot{}}{\vee }\left(\left(p\underset{\dot{}}{\vee }t\right)\underset{\dot{}}{\wedge }W\right)\right)$$
10		eqid	$$⊢\left(p\underset{\dot{}}{\vee }q\right)\underset{\dot{}}{\wedge }\left(\left(\left(t\underset{\dot{}}{\vee }\left(\left(p\underset{\dot{}}{\vee }q\right)\underset{\dot{}}{\wedge }W\right)\right)\underset{\dot{}}{\wedge }\left(q\underset{\dot{}}{\vee }\left(\left(p\underset{\dot{}}{\vee }t\right)\underset{\dot{}}{\wedge }W\right)\right)\right)\underset{\dot{}}{\vee }\left(\left(s\underset{\dot{}}{\vee }t\right)\underset{\dot{}}{\wedge }W\right)\right)=\left(p\underset{\dot{}}{\vee }q\right)\underset{\dot{}}{\wedge }\left(\left(\left(t\underset{\dot{}}{\vee }\left(\left(p\underset{\dot{}}{\vee }q\right)\underset{\dot{}}{\wedge }W\right)\right)\underset{\dot{}}{\wedge }\left(q\underset{\dot{}}{\vee }\left(\left(p\underset{\dot{}}{\vee }t\right)\underset{\dot{}}{\wedge }W\right)\right)\right)\underset{\dot{}}{\vee }\left(\left(s\underset{\dot{}}{\vee }t\right)\underset{\dot{}}{\wedge }W\right)\right)$$
11		eqid	$$⊢\left(x\in B⟼if\left(\left(p\ne q\wedge \neg x\underset{\dot{}}{\le }W\right),\left(\iota z\in B|\forall s\in A\left(\left(\neg s\underset{\dot{}}{\le }W\wedge s\underset{\dot{}}{\vee }\left(x\underset{\dot{}}{\wedge }W\right)=x\right)\to z=if\left(s\underset{\dot{}}{\le }\left(p\underset{\dot{}}{\vee }q\right),\left(\iota y\in B|\forall t\in A\left(\left(\neg t\underset{\dot{}}{\le }W\wedge \neg t\underset{\dot{}}{\le }\left(p\underset{\dot{}}{\vee }q\right)\right)\to y=\left(p\underset{\dot{}}{\vee }q\right)\underset{\dot{}}{\wedge }\left(\left(\left(t\underset{\dot{}}{\vee }\left(\left(p\underset{\dot{}}{\vee }q\right)\underset{\dot{}}{\wedge }W\right)\right)\underset{\dot{}}{\wedge }\left(q\underset{\dot{}}{\vee }\left(\left(p\underset{\dot{}}{\vee }t\right)\underset{\dot{}}{\wedge }W\right)\right)\right)\underset{\dot{}}{\vee }\left(\left(s\underset{\dot{}}{\vee }t\right)\underset{\dot{}}{\wedge }W\right)\right)\right)\right),⦋s/t⦌\left(\left(t\underset{\dot{}}{\vee }\left(\left(p\underset{\dot{}}{\vee }q\right)\underset{\dot{}}{\wedge }W\right)\right)\underset{\dot{}}{\wedge }\left(q\underset{\dot{}}{\vee }\left(\left(p\underset{\dot{}}{\vee }t\right)\underset{\dot{}}{\wedge }W\right)\right)\right)\right)\underset{\dot{}}{\vee }\left(x\underset{\dot{}}{\wedge }W\right)\right)\right),x\right)\right)=\left(x\in B⟼if\left(\left(p\ne q\wedge \neg x\underset{\dot{}}{\le }W\right),\left(\iota z\in B|\forall s\in A\left(\left(\neg s\underset{\dot{}}{\le }W\wedge s\underset{\dot{}}{\vee }\left(x\underset{\dot{}}{\wedge }W\right)=x\right)\to z=if\left(s\underset{\dot{}}{\le }\left(p\underset{\dot{}}{\vee }q\right),\left(\iota y\in B|\forall t\in A\left(\left(\neg t\underset{\dot{}}{\le }W\wedge \neg t\underset{\dot{}}{\le }\left(p\underset{\dot{}}{\vee }q\right)\right)\to y=\left(p\underset{\dot{}}{\vee }q\right)\underset{\dot{}}{\wedge }\left(\left(\left(t\underset{\dot{}}{\vee }\left(\left(p\underset{\dot{}}{\vee }q\right)\underset{\dot{}}{\wedge }W\right)\right)\underset{\dot{}}{\wedge }\left(q\underset{\dot{}}{\vee }\left(\left(p\underset{\dot{}}{\vee }t\right)\underset{\dot{}}{\wedge }W\right)\right)\right)\underset{\dot{}}{\vee }\left(\left(s\underset{\dot{}}{\vee }t\right)\underset{\dot{}}{\wedge }W\right)\right)\right)\right),⦋s/t⦌\left(\left(t\underset{\dot{}}{\vee }\left(\left(p\underset{\dot{}}{\vee }q\right)\underset{\dot{}}{\wedge }W\right)\right)\underset{\dot{}}{\wedge }\left(q\underset{\dot{}}{\vee }\left(\left(p\underset{\dot{}}{\vee }t\right)\underset{\dot{}}{\wedge }W\right)\right)\right)\right)\underset{\dot{}}{\vee }\left(x\underset{\dot{}}{\wedge }W\right)\right)\right),x\right)\right)$$
12	7 3 4 6 5 1 2 8 9 10 11	cdlemg2fvlem	$$⊢\left(\left(K\in \mathrm{HL}\wedge W\in H\right)\wedge \left(\left(P\in A\wedge \neg P\underset{\dot{}}{\le }W\right)\wedge \left(X\in B\wedge \neg X\underset{\dot{}}{\le }W\right)\right)\wedge \left(F\in T\wedge P\underset{\dot{}}{\vee }\left(X\underset{\dot{}}{\wedge }W\right)=X\right)\right)\to F\left(X\right)=F\left(P\right)\underset{\dot{}}{\vee }\left(X\underset{\dot{}}{\wedge }W\right)$$