| Step | Hyp | Ref | Expression | 
						
							| 1 |  | cdlemg12.l |  |-  .<_ = ( le ` K ) | 
						
							| 2 |  | cdlemg12.j |  |-  .\/ = ( join ` K ) | 
						
							| 3 |  | cdlemg12.m |  |-  ./\ = ( meet ` K ) | 
						
							| 4 |  | cdlemg12.a |  |-  A = ( Atoms ` K ) | 
						
							| 5 |  | cdlemg12.h |  |-  H = ( LHyp ` K ) | 
						
							| 6 |  | cdlemg12.t |  |-  T = ( ( LTrn ` K ) ` W ) | 
						
							| 7 |  | cdlemg12b.r |  |-  R = ( ( trL ` K ) ` W ) | 
						
							| 8 |  | simp1 |  |-  ( ( ( K e. HL /\ W e. H ) /\ ( ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( F e. T /\ G e. T /\ ( G ` P ) = P ) ) -> ( K e. HL /\ W e. H ) ) | 
						
							| 9 |  | simp31 |  |-  ( ( ( K e. HL /\ W e. H ) /\ ( ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( F e. T /\ G e. T /\ ( G ` P ) = P ) ) -> F e. T ) | 
						
							| 10 |  | simp2l |  |-  ( ( ( K e. HL /\ W e. H ) /\ ( ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( F e. T /\ G e. T /\ ( G ` P ) = P ) ) -> ( P e. A /\ -. P .<_ W ) ) | 
						
							| 11 |  | simp2r |  |-  ( ( ( K e. HL /\ W e. H ) /\ ( ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( F e. T /\ G e. T /\ ( G ` P ) = P ) ) -> ( Q e. A /\ -. Q .<_ W ) ) | 
						
							| 12 | 1 2 3 4 5 6 | ltrnu |  |-  ( ( ( ( K e. HL /\ W e. H ) /\ F e. T ) /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) -> ( ( P .\/ ( F ` P ) ) ./\ W ) = ( ( Q .\/ ( F ` Q ) ) ./\ W ) ) | 
						
							| 13 | 8 9 10 11 12 | syl211anc |  |-  ( ( ( K e. HL /\ W e. H ) /\ ( ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( F e. T /\ G e. T /\ ( G ` P ) = P ) ) -> ( ( P .\/ ( F ` P ) ) ./\ W ) = ( ( Q .\/ ( F ` Q ) ) ./\ W ) ) | 
						
							| 14 |  | simp33 |  |-  ( ( ( K e. HL /\ W e. H ) /\ ( ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( F e. T /\ G e. T /\ ( G ` P ) = P ) ) -> ( G ` P ) = P ) | 
						
							| 15 | 14 | fveq2d |  |-  ( ( ( K e. HL /\ W e. H ) /\ ( ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( F e. T /\ G e. T /\ ( G ` P ) = P ) ) -> ( F ` ( G ` P ) ) = ( F ` P ) ) | 
						
							| 16 | 15 | oveq2d |  |-  ( ( ( K e. HL /\ W e. H ) /\ ( ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( F e. T /\ G e. T /\ ( G ` P ) = P ) ) -> ( P .\/ ( F ` ( G ` P ) ) ) = ( P .\/ ( F ` P ) ) ) | 
						
							| 17 | 16 | oveq1d |  |-  ( ( ( K e. HL /\ W e. H ) /\ ( ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( F e. T /\ G e. T /\ ( G ` P ) = P ) ) -> ( ( P .\/ ( F ` ( G ` P ) ) ) ./\ W ) = ( ( P .\/ ( F ` P ) ) ./\ W ) ) | 
						
							| 18 |  | simp32 |  |-  ( ( ( K e. HL /\ W e. H ) /\ ( ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( F e. T /\ G e. T /\ ( G ` P ) = P ) ) -> G e. T ) | 
						
							| 19 | 1 4 5 6 | ltrnateq |  |-  ( ( ( K e. HL /\ W e. H ) /\ ( G e. T /\ ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( G ` P ) = P ) -> ( G ` Q ) = Q ) | 
						
							| 20 | 8 18 10 11 14 19 | syl131anc |  |-  ( ( ( K e. HL /\ W e. H ) /\ ( ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( F e. T /\ G e. T /\ ( G ` P ) = P ) ) -> ( G ` Q ) = Q ) | 
						
							| 21 | 20 | fveq2d |  |-  ( ( ( K e. HL /\ W e. H ) /\ ( ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( F e. T /\ G e. T /\ ( G ` P ) = P ) ) -> ( F ` ( G ` Q ) ) = ( F ` Q ) ) | 
						
							| 22 | 21 | oveq2d |  |-  ( ( ( K e. HL /\ W e. H ) /\ ( ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( F e. T /\ G e. T /\ ( G ` P ) = P ) ) -> ( Q .\/ ( F ` ( G ` Q ) ) ) = ( Q .\/ ( F ` Q ) ) ) | 
						
							| 23 | 22 | oveq1d |  |-  ( ( ( K e. HL /\ W e. H ) /\ ( ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( F e. T /\ G e. T /\ ( G ` P ) = P ) ) -> ( ( Q .\/ ( F ` ( G ` Q ) ) ) ./\ W ) = ( ( Q .\/ ( F ` Q ) ) ./\ W ) ) | 
						
							| 24 | 13 17 23 | 3eqtr4d |  |-  ( ( ( K e. HL /\ W e. H ) /\ ( ( P e. A /\ -. P .<_ W ) /\ ( Q e. A /\ -. Q .<_ W ) ) /\ ( F e. T /\ G e. T /\ ( G ` P ) = P ) ) -> ( ( P .\/ ( F ` ( G ` P ) ) ) ./\ W ) = ( ( Q .\/ ( F ` ( G ` Q ) ) ) ./\ W ) ) |