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Metamath Proof Explorer

Theorem cdleme32a

Description: Part of proof of Lemma D in Crawley p. 113. (Contributed by NM, 19-Feb-2013)

Ref Expression
Hypotheses cdleme32.b 
|- B = ( Base ` K )
cdleme32.l 
|- .<_ = ( le ` K )
cdleme32.j 
|- .\/ = ( join ` K )
cdleme32.m 
|- ./\ = ( meet ` K )
cdleme32.a 
|- A = ( Atoms ` K )
cdleme32.h 
|- H = ( LHyp ` K )
cdleme32.u 
|- U = ( ( P .\/ Q ) ./\ W )
cdleme32.c 
|- C = ( ( s .\/ U ) ./\ ( Q .\/ ( ( P .\/ s ) ./\ W ) ) )
cdleme32.d 
|- D = ( ( t .\/ U ) ./\ ( Q .\/ ( ( P .\/ t ) ./\ W ) ) )
cdleme32.e 
|- E = ( ( P .\/ Q ) ./\ ( D .\/ ( ( s .\/ t ) ./\ W ) ) )
cdleme32.i 
|- I = ( iota_ y e. B A. t e. A ( ( -. t .<_ W /\ -. t .<_ ( P .\/ Q ) ) -> y = E ) )
cdleme32.n 
|- N = if ( s .<_ ( P .\/ Q ) , I , C )
cdleme32.o 
|- O = ( iota_ z e. B A. s e. A ( ( -. s .<_ W /\ ( s .\/ ( x ./\ W ) ) = x ) -> z = ( N .\/ ( x ./\ W ) ) ) )
cdleme32.f 
|- F = ( x e. B |-> if ( ( P =/= Q /\ -. x .<_ W ) , O , x ) )
Assertion cdleme32a 
|- ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( X e. B /\ ( P =/= Q /\ -. X .<_ W ) ) /\ ( ( s e. A /\ -. s .<_ W ) /\ ( s .\/ ( X ./\ W ) ) = X ) ) -> ( F ` X ) = ( N .\/ ( X ./\ W ) ) )

Proof

Step Hyp Ref Expression
1 cdleme32.b 
 |-  B = ( Base ` K )
2 cdleme32.l 
 |-  .<_ = ( le ` K )
3 cdleme32.j 
 |-  .\/ = ( join ` K )
4 cdleme32.m 
 |-  ./\ = ( meet ` K )
5 cdleme32.a 
 |-  A = ( Atoms ` K )
6 cdleme32.h 
 |-  H = ( LHyp ` K )
7 cdleme32.u 
 |-  U = ( ( P .\/ Q ) ./\ W )
8 cdleme32.c 
 |-  C = ( ( s .\/ U ) ./\ ( Q .\/ ( ( P .\/ s ) ./\ W ) ) )
9 cdleme32.d 
 |-  D = ( ( t .\/ U ) ./\ ( Q .\/ ( ( P .\/ t ) ./\ W ) ) )
10 cdleme32.e 
 |-  E = ( ( P .\/ Q ) ./\ ( D .\/ ( ( s .\/ t ) ./\ W ) ) )
11 cdleme32.i 
 |-  I = ( iota_ y e. B A. t e. A ( ( -. t .<_ W /\ -. t .<_ ( P .\/ Q ) ) -> y = E ) )
12 cdleme32.n 
 |-  N = if ( s .<_ ( P .\/ Q ) , I , C )
13 cdleme32.o 
 |-  O = ( iota_ z e. B A. s e. A ( ( -. s .<_ W /\ ( s .\/ ( x ./\ W ) ) = x ) -> z = ( N .\/ ( x ./\ W ) ) ) )
14 cdleme32.f 
 |-  F = ( x e. B |-> if ( ( P =/= Q /\ -. x .<_ W ) , O , x ) )
15 1 fvexi 
 |-  B e. _V
16 anass 
 |-  ( ( ( s e. A /\ -. s .<_ W ) /\ ( s .\/ ( X ./\ W ) ) = X ) <-> ( s e. A /\ ( -. s .<_ W /\ ( s .\/ ( X ./\ W ) ) = X ) ) )
17 eqid 
 |-  ( iota_ z e. B A. s e. A ( ( -. s .<_ W /\ ( s .\/ ( X ./\ W ) ) = X ) -> z = ( N .\/ ( X ./\ W ) ) ) ) = ( iota_ z e. B A. s e. A ( ( -. s .<_ W /\ ( s .\/ ( X ./\ W ) ) = X ) -> z = ( N .\/ ( X ./\ W ) ) ) )
18 13 14 17 cdleme31fv1 
 |-  ( ( X e. B /\ ( P =/= Q /\ -. X .<_ W ) ) -> ( F ` X ) = ( iota_ z e. B A. s e. A ( ( -. s .<_ W /\ ( s .\/ ( X ./\ W ) ) = X ) -> z = ( N .\/ ( X ./\ W ) ) ) ) )
19 18 adantl 
 |-  ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( X e. B /\ ( P =/= Q /\ -. X .<_ W ) ) ) -> ( F ` X ) = ( iota_ z e. B A. s e. A ( ( -. s .<_ W /\ ( s .\/ ( X ./\ W ) ) = X ) -> z = ( N .\/ ( X ./\ W ) ) ) ) )
20 1 2 3 4 5 6 7 8 9 10 11 12 13 14 cdleme32fvcl 
 |-  ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ X e. B ) -> ( F ` X ) e. B )
21 20 adantrr 
 |-  ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( X e. B /\ ( P =/= Q /\ -. X .<_ W ) ) ) -> ( F ` X ) e. B )
22 19 21 riotasvd 
 |-  ( ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( X e. B /\ ( P =/= Q /\ -. X .<_ W ) ) ) /\ B e. _V ) -> ( ( s e. A /\ ( -. s .<_ W /\ ( s .\/ ( X ./\ W ) ) = X ) ) -> ( F ` X ) = ( N .\/ ( X ./\ W ) ) ) )
23 16 22 biimtrid 
 |-  ( ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( X e. B /\ ( P =/= Q /\ -. X .<_ W ) ) ) /\ B e. _V ) -> ( ( ( s e. A /\ -. s .<_ W ) /\ ( s .\/ ( X ./\ W ) ) = X ) -> ( F ` X ) = ( N .\/ ( X ./\ W ) ) ) )
24 15 23 mpan2 
 |-  ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( X e. B /\ ( P =/= Q /\ -. X .<_ W ) ) ) -> ( ( ( s e. A /\ -. s .<_ W ) /\ ( s .\/ ( X ./\ W ) ) = X ) -> ( F ` X ) = ( N .\/ ( X ./\ W ) ) ) )
25 24 3impia 
 |-  ( ( ( ( K e. HL /\ W e. H ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( X e. B /\ ( P =/= Q /\ -. X .<_ W ) ) /\ ( ( s e. A /\ -. s .<_ W ) /\ ( s .\/ ( X ./\ W ) ) = X ) ) -> ( F ` X ) = ( N .\/ ( X ./\ W ) ) )