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Description: Part of proof of Lemma E in Crawley p. 113. TODO: FIX COMMENT . f preserves join: f(r \/ s) = f(r) \/ s, p. 115 10th line from bottom. TODO: Use instead of cdleme42mN ? Combine with cdleme42mN ? (Contributed by NM, 20-Mar-2013) (New usage is discouraged.)
| Ref | Expression | ||
|---|---|---|---|
| Hypotheses | cdleme41.b | |- B = ( Base ` K ) |
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| cdleme41.l | |- .<_ = ( le ` K ) |
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| cdleme41.j | |- .\/ = ( join ` K ) |
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| cdleme41.m | |- ./\ = ( meet ` K ) |
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| cdleme41.a | |- A = ( Atoms ` K ) |
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| cdleme41.h | |- H = ( LHyp ` K ) |
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| cdleme41.u | |- U = ( ( P .\/ Q ) ./\ W ) |
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| cdleme41.d | |- D = ( ( s .\/ U ) ./\ ( Q .\/ ( ( P .\/ s ) ./\ W ) ) ) |
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| cdleme41.e | |- E = ( ( t .\/ U ) ./\ ( Q .\/ ( ( P .\/ t ) ./\ W ) ) ) |
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| cdleme41.g | |- G = ( ( P .\/ Q ) ./\ ( E .\/ ( ( s .\/ t ) ./\ W ) ) ) |
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| cdleme41.i | |- I = ( iota_ y e. B A. t e. A ( ( -. t .<_ W /\ -. t .<_ ( P .\/ Q ) ) -> y = G ) ) |
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| cdleme41.n | |- N = if ( s .<_ ( P .\/ Q ) , I , D ) |
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| cdleme41.o | |- O = ( iota_ z e. B A. s e. A ( ( -. s .<_ W /\ ( s .\/ ( x ./\ W ) ) = x ) -> z = ( N .\/ ( x ./\ W ) ) ) ) |
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| cdleme41.f | |- F = ( x e. B |-> if ( ( P =/= Q /\ -. x .<_ W ) , O , x ) ) |
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| Assertion | cdleme42mgN | |- ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( ( R e. A /\ -. R .<_ W ) /\ ( S e. A /\ -. S .<_ W ) ) ) -> ( F ` ( R .\/ S ) ) = ( ( F ` R ) .\/ ( F ` S ) ) ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | cdleme41.b | |- B = ( Base ` K ) |
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| 2 | cdleme41.l | |- .<_ = ( le ` K ) |
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| 3 | cdleme41.j | |- .\/ = ( join ` K ) |
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| 4 | cdleme41.m | |- ./\ = ( meet ` K ) |
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| 5 | cdleme41.a | |- A = ( Atoms ` K ) |
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| 6 | cdleme41.h | |- H = ( LHyp ` K ) |
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| 7 | cdleme41.u | |- U = ( ( P .\/ Q ) ./\ W ) |
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| 8 | cdleme41.d | |- D = ( ( s .\/ U ) ./\ ( Q .\/ ( ( P .\/ s ) ./\ W ) ) ) |
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| 9 | cdleme41.e | |- E = ( ( t .\/ U ) ./\ ( Q .\/ ( ( P .\/ t ) ./\ W ) ) ) |
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| 10 | cdleme41.g | |- G = ( ( P .\/ Q ) ./\ ( E .\/ ( ( s .\/ t ) ./\ W ) ) ) |
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| 11 | cdleme41.i | |- I = ( iota_ y e. B A. t e. A ( ( -. t .<_ W /\ -. t .<_ ( P .\/ Q ) ) -> y = G ) ) |
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| 12 | cdleme41.n | |- N = if ( s .<_ ( P .\/ Q ) , I , D ) |
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| 13 | cdleme41.o | |- O = ( iota_ z e. B A. s e. A ( ( -. s .<_ W /\ ( s .\/ ( x ./\ W ) ) = x ) -> z = ( N .\/ ( x ./\ W ) ) ) ) |
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| 14 | cdleme41.f | |- F = ( x e. B |-> if ( ( P =/= Q /\ -. x .<_ W ) , O , x ) ) |
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| 15 | simpl1l | |- ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( ( R e. A /\ -. R .<_ W ) /\ ( S e. A /\ -. S .<_ W ) ) ) -> K e. HL ) |
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| 16 | 15 | hllatd | |- ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( ( R e. A /\ -. R .<_ W ) /\ ( S e. A /\ -. S .<_ W ) ) ) -> K e. Lat ) |
| 17 | simprll | |- ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( ( R e. A /\ -. R .<_ W ) /\ ( S e. A /\ -. S .<_ W ) ) ) -> R e. A ) |
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| 18 | 1 5 | atbase | |- ( R e. A -> R e. B ) |
| 19 | 17 18 | syl | |- ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( ( R e. A /\ -. R .<_ W ) /\ ( S e. A /\ -. S .<_ W ) ) ) -> R e. B ) |
| 20 | simprrl | |- ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( ( R e. A /\ -. R .<_ W ) /\ ( S e. A /\ -. S .<_ W ) ) ) -> S e. A ) |
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| 21 | 1 5 | atbase | |- ( S e. A -> S e. B ) |
| 22 | 20 21 | syl | |- ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( ( R e. A /\ -. R .<_ W ) /\ ( S e. A /\ -. S .<_ W ) ) ) -> S e. B ) |
| 23 | 16 19 22 | 3jca | |- ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( ( R e. A /\ -. R .<_ W ) /\ ( S e. A /\ -. S .<_ W ) ) ) -> ( K e. Lat /\ R e. B /\ S e. B ) ) |
| 24 | 1 3 | latjcl | |- ( ( K e. Lat /\ R e. B /\ S e. B ) -> ( R .\/ S ) e. B ) |
| 25 | 14 | cdleme31id | |- ( ( ( R .\/ S ) e. B /\ P = Q ) -> ( F ` ( R .\/ S ) ) = ( R .\/ S ) ) |
| 26 | 24 25 | sylan | |- ( ( ( K e. Lat /\ R e. B /\ S e. B ) /\ P = Q ) -> ( F ` ( R .\/ S ) ) = ( R .\/ S ) ) |
| 27 | 14 | cdleme31id | |- ( ( R e. B /\ P = Q ) -> ( F ` R ) = R ) |
| 28 | 27 | 3ad2antl2 | |- ( ( ( K e. Lat /\ R e. B /\ S e. B ) /\ P = Q ) -> ( F ` R ) = R ) |
| 29 | 14 | cdleme31id | |- ( ( S e. B /\ P = Q ) -> ( F ` S ) = S ) |
| 30 | 29 | 3ad2antl3 | |- ( ( ( K e. Lat /\ R e. B /\ S e. B ) /\ P = Q ) -> ( F ` S ) = S ) |
| 31 | 28 30 | oveq12d | |- ( ( ( K e. Lat /\ R e. B /\ S e. B ) /\ P = Q ) -> ( ( F ` R ) .\/ ( F ` S ) ) = ( R .\/ S ) ) |
| 32 | 26 31 | eqtr4d | |- ( ( ( K e. Lat /\ R e. B /\ S e. B ) /\ P = Q ) -> ( F ` ( R .\/ S ) ) = ( ( F ` R ) .\/ ( F ` S ) ) ) |
| 33 | 23 32 | sylan | |- ( ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( ( R e. A /\ -. R .<_ W ) /\ ( S e. A /\ -. S .<_ W ) ) ) /\ P = Q ) -> ( F ` ( R .\/ S ) ) = ( ( F ` R ) .\/ ( F ` S ) ) ) |
| 34 | simpll | |- ( ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( ( R e. A /\ -. R .<_ W ) /\ ( S e. A /\ -. S .<_ W ) ) ) /\ P =/= Q ) -> ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) ) |
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| 35 | simpr | |- ( ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( ( R e. A /\ -. R .<_ W ) /\ ( S e. A /\ -. S .<_ W ) ) ) /\ P =/= Q ) -> P =/= Q ) |
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| 36 | simplrl | |- ( ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( ( R e. A /\ -. R .<_ W ) /\ ( S e. A /\ -. S .<_ W ) ) ) /\ P =/= Q ) -> ( R e. A /\ -. R .<_ W ) ) |
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| 37 | simplrr | |- ( ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( ( R e. A /\ -. R .<_ W ) /\ ( S e. A /\ -. S .<_ W ) ) ) /\ P =/= Q ) -> ( S e. A /\ -. S .<_ W ) ) |
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| 38 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 | cdleme42mN | |- ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( P =/= Q /\ ( R e. A /\ -. R .<_ W ) /\ ( S e. A /\ -. S .<_ W ) ) ) -> ( F ` ( R .\/ S ) ) = ( ( F ` R ) .\/ ( F ` S ) ) ) |
| 39 | 34 35 36 37 38 | syl13anc | |- ( ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( ( R e. A /\ -. R .<_ W ) /\ ( S e. A /\ -. S .<_ W ) ) ) /\ P =/= Q ) -> ( F ` ( R .\/ S ) ) = ( ( F ` R ) .\/ ( F ` S ) ) ) |
| 40 | 33 39 | pm2.61dane | |- ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( ( R e. A /\ -. R .<_ W ) /\ ( S e. A /\ -. S .<_ W ) ) ) -> ( F ` ( R .\/ S ) ) = ( ( F ` R ) .\/ ( F ` S ) ) ) |