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Theorem genpassl 7839
Description: Associativity of lower cuts. Lemma for genpassg 7841. (Contributed by Jim Kingdon, 11-Dec-2019.)
Hypotheses
Ref Expression
genpelvl.1 |- F = ( w e. P. , v e. P. |-> <. { x e. Q. | E. y e. Q. E. z e. Q. ( y e. ( 1st ` w ) /\ z e. ( 1st ` v ) /\ x = ( y G z ) ) } , { x e. Q. | E. y e. Q. E. z e. Q. ( y e. ( 2nd ` w ) /\ z e. ( 2nd ` v ) /\ x = ( y G z ) ) } >. )
genpelvl.2 |- ( ( y e. Q. /\ z e. Q. ) -> ( y G z ) e. Q. )
genpassg.4 |- dom F = ( P. X. P. )
genpassg.5 |- ( ( f e. P. /\ g e. P. ) -> ( f F g ) e. P. )
genpassg.6 |- ( ( f e. Q. /\ g e. Q. /\ h e. Q. ) -> ( ( f G g ) G h ) = ( f G ( g G h ) ) )
Assertion
Ref Expression
genpassl |- ( ( A e. P. /\ B e. P. /\ C e. P. ) -> ( 1st ` ( ( A F B ) F C ) ) = ( 1st ` ( A F ( B F C ) ) ) )
Distinct variable groups:   x, y, z, f, g, h, w, v, A   x, B, y, z, f, g, h, w, v   x, G, y, z, f, g, h, w, v   f, F, g   C, f, g, h, v, w, x, y, z   h, F, v, w, x, y, z
Proof of Theorem genpassl
Dummy variable t is distinct from all other variables.
StepHypRef Expression
1 prop 7790 . . . . . . . . 9 |- ( A e. P. -> <. ( 1st ` A ) , ( 2nd ` A ) >. e. P. )
2 elprnql 7796 . . . . . . . . 9 |- ( ( <. ( 1st ` A ) , ( 2nd ` A ) >. e. P. /\ f e. ( 1st ` A ) ) -> f e. Q. )
31, 2sylan 283 . . . . . . . 8 |- ( ( A e. P. /\ f e. ( 1st ` A ) ) -> f e. Q. )
4 prop 7790 . . . . . . . . . . . . . . . 16 |- ( B e. P. -> <. ( 1st ` B ) , ( 2nd ` B ) >. e. P. )
5 elprnql 7796 . . . . . . . . . . . . . . . 16 |- ( ( <. ( 1st ` B ) , ( 2nd ` B ) >. e. P. /\ g e. ( 1st ` B ) ) -> g e. Q. )
64, 5sylan 283 . . . . . . . . . . . . . . 15 |- ( ( B e. P. /\ g e. ( 1st ` B ) ) -> g e. Q. )
7 prop 7790 . . . . . . . . . . . . . . . . . . . . 21 |- ( C e. P. -> <. ( 1st ` C ) , ( 2nd ` C ) >. e. P. )
8 elprnql 7796 . . . . . . . . . . . . . . . . . . . . 21 |- ( ( <. ( 1st ` C ) , ( 2nd ` C ) >. e. P. /\ h e. ( 1st ` C ) ) -> h e. Q. )
97, 8sylan 283 . . . . . . . . . . . . . . . . . . . 20 |- ( ( C e. P. /\ h e. ( 1st ` C ) ) -> h e. Q. )
10 oveq2 6058 . . . . . . . . . . . . . . . . . . . . . . . . . 26 |- ( t = ( g G h ) -> ( f G t ) = ( f G ( g G h ) ) )
1110adantr 276 . . . . . . . . . . . . . . . . . . . . . . . . 25 |- ( ( t = ( g G h ) /\ ( f e. Q. /\ g e. Q. /\ h e. Q. ) ) -> ( f G t ) = ( f G ( g G h ) ) )
12 genpassg.6 . . . . . . . . . . . . . . . . . . . . . . . . . 26 |- ( ( f e. Q. /\ g e. Q. /\ h e. Q. ) -> ( ( f G g ) G h ) = ( f G ( g G h ) ) )
1312adantl 277 . . . . . . . . . . . . . . . . . . . . . . . . 25 |- ( ( t = ( g G h ) /\ ( f e. Q. /\ g e. Q. /\ h e. Q. ) ) -> ( ( f G g ) G h ) = ( f G ( g G h ) ) )
1411, 13eqtr4d 2268 . . . . . . . . . . . . . . . . . . . . . . . 24 |- ( ( t = ( g G h ) /\ ( f e. Q. /\ g e. Q. /\ h e. Q. ) ) -> ( f G t ) = ( ( f G g ) G h ) )
1514eqeq2d 2244 . . . . . . . . . . . . . . . . . . . . . . 23 |- ( ( t = ( g G h ) /\ ( f e. Q. /\ g e. Q. /\ h e. Q. ) ) -> ( x = ( f G t ) <-> x = ( ( f G g ) G h ) ) )
1615expcom 116 . . . . . . . . . . . . . . . . . . . . . 22 |- ( ( f e. Q. /\ g e. Q. /\ h e. Q. ) -> ( t = ( g G h ) -> ( x = ( f G t ) <-> x = ( ( f G g ) G h ) ) ) )
1716pm5.32d 450 . . . . . . . . . . . . . . . . . . . . 21 |- ( ( f e. Q. /\ g e. Q. /\ h e. Q. ) -> ( ( t = ( g G h ) /\ x = ( f G t ) ) <-> ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) ) )
18173expa 1230 . . . . . . . . . . . . . . . . . . . 20 |- ( ( ( f e. Q. /\ g e. Q. ) /\ h e. Q. ) -> ( ( t = ( g G h ) /\ x = ( f G t ) ) <-> ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) ) )
199, 18sylan2 286 . . . . . . . . . . . . . . . . . . 19 |- ( ( ( f e. Q. /\ g e. Q. ) /\ ( C e. P. /\ h e. ( 1st ` C ) ) ) -> ( ( t = ( g G h ) /\ x = ( f G t ) ) <-> ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) ) )
2019anassrs 400 . . . . . . . . . . . . . . . . . 18 |- ( ( ( ( f e. Q. /\ g e. Q. ) /\ C e. P. ) /\ h e. ( 1st ` C ) ) -> ( ( t = ( g G h ) /\ x = ( f G t ) ) <-> ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) ) )
2120rexbidva 2539 . . . . . . . . . . . . . . . . 17 |- ( ( ( f e. Q. /\ g e. Q. ) /\ C e. P. ) -> ( E. h e. ( 1st ` C ) ( t = ( g G h ) /\ x = ( f G t ) ) <-> E. h e. ( 1st ` C ) ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) ) )
22 r19.41v 2699 . . . . . . . . . . . . . . . . 17 |- ( E. h e. ( 1st ` C ) ( t = ( g G h ) /\ x = ( f G t ) ) <-> ( E. h e. ( 1st ` C ) t = ( g G h ) /\ x = ( f G t ) ) )
2321, 22bitr3di 195 . . . . . . . . . . . . . . . 16 |- ( ( ( f e. Q. /\ g e. Q. ) /\ C e. P. ) -> ( E. h e. ( 1st ` C ) ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) <-> ( E. h e. ( 1st ` C ) t = ( g G h ) /\ x = ( f G t ) ) ) )
2423an32s 570 . . . . . . . . . . . . . . 15 |- ( ( ( f e. Q. /\ C e. P. ) /\ g e. Q. ) -> ( E. h e. ( 1st ` C ) ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) <-> ( E. h e. ( 1st ` C ) t = ( g G h ) /\ x = ( f G t ) ) ) )
256, 24sylan2 286 . . . . . . . . . . . . . 14 |- ( ( ( f e. Q. /\ C e. P. ) /\ ( B e. P. /\ g e. ( 1st ` B ) ) ) -> ( E. h e. ( 1st ` C ) ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) <-> ( E. h e. ( 1st ` C ) t = ( g G h ) /\ x = ( f G t ) ) ) )
2625anassrs 400 . . . . . . . . . . . . 13 |- ( ( ( ( f e. Q. /\ C e. P. ) /\ B e. P. ) /\ g e. ( 1st ` B ) ) -> ( E. h e. ( 1st ` C ) ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) <-> ( E. h e. ( 1st ` C ) t = ( g G h ) /\ x = ( f G t ) ) ) )
2726rexbidva 2539 . . . . . . . . . . . 12 |- ( ( ( f e. Q. /\ C e. P. ) /\ B e. P. ) -> ( E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) <-> E. g e. ( 1st ` B ) ( E. h e. ( 1st ` C ) t = ( g G h ) /\ x = ( f G t ) ) ) )
28 r19.41v 2699 . . . . . . . . . . . 12 |- ( E. g e. ( 1st ` B ) ( E. h e. ( 1st ` C ) t = ( g G h ) /\ x = ( f G t ) ) <-> ( E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) t = ( g G h ) /\ x = ( f G t ) ) )
2927, 28bitrdi 196 . . . . . . . . . . 11 |- ( ( ( f e. Q. /\ C e. P. ) /\ B e. P. ) -> ( E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) <-> ( E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) t = ( g G h ) /\ x = ( f G t ) ) ) )
3029an31s 572 . . . . . . . . . 10 |- ( ( ( B e. P. /\ C e. P. ) /\ f e. Q. ) -> ( E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) <-> ( E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) t = ( g G h ) /\ x = ( f G t ) ) ) )
3130exbidv 1874 . . . . . . . . 9 |- ( ( ( B e. P. /\ C e. P. ) /\ f e. Q. ) -> ( E. t E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) <-> E. t ( E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) t = ( g G h ) /\ x = ( f G t ) ) ) )
32 genpelvl.2 . . . . . . . . . . . . . . . . . . . . . . . 24 |- ( ( y e. Q. /\ z e. Q. ) -> ( y G z ) e. Q. )
3332caovcl 6209 . . . . . . . . . . . . . . . . . . . . . . 23 |- ( ( g e. Q. /\ h e. Q. ) -> ( g G h ) e. Q. )
34 elisset 2828 . . . . . . . . . . . . . . . . . . . . . . 23 |- ( ( g G h ) e. Q. -> E. t t = ( g G h ) )
3533, 34syl 14 . . . . . . . . . . . . . . . . . . . . . 22 |- ( ( g e. Q. /\ h e. Q. ) -> E. t t = ( g G h ) )
3635biantrurd 305 . . . . . . . . . . . . . . . . . . . . 21 |- ( ( g e. Q. /\ h e. Q. ) -> ( x = ( ( f G g ) G h ) <-> ( E. t t = ( g G h ) /\ x = ( ( f G g ) G h ) ) ) )
37 19.41v 1952 . . . . . . . . . . . . . . . . . . . . 21 |- ( E. t ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) <-> ( E. t t = ( g G h ) /\ x = ( ( f G g ) G h ) ) )
3836, 37bitr4di 198 . . . . . . . . . . . . . . . . . . . 20 |- ( ( g e. Q. /\ h e. Q. ) -> ( x = ( ( f G g ) G h ) <-> E. t ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) ) )
399, 38sylan2 286 . . . . . . . . . . . . . . . . . . 19 |- ( ( g e. Q. /\ ( C e. P. /\ h e. ( 1st ` C ) ) ) -> ( x = ( ( f G g ) G h ) <-> E. t ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) ) )
4039anassrs 400 . . . . . . . . . . . . . . . . . 18 |- ( ( ( g e. Q. /\ C e. P. ) /\ h e. ( 1st ` C ) ) -> ( x = ( ( f G g ) G h ) <-> E. t ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) ) )
4140rexbidva 2539 . . . . . . . . . . . . . . . . 17 |- ( ( g e. Q. /\ C e. P. ) -> ( E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) <-> E. h e. ( 1st ` C ) E. t ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) ) )
42 rexcom4 2837 . . . . . . . . . . . . . . . . 17 |- ( E. h e. ( 1st ` C ) E. t ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) <-> E. t E. h e. ( 1st ` C ) ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) )
4341, 42bitrdi 196 . . . . . . . . . . . . . . . 16 |- ( ( g e. Q. /\ C e. P. ) -> ( E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) <-> E. t E. h e. ( 1st ` C ) ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) ) )
4443ancoms 268 . . . . . . . . . . . . . . 15 |- ( ( C e. P. /\ g e. Q. ) -> ( E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) <-> E. t E. h e. ( 1st ` C ) ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) ) )
456, 44sylan2 286 . . . . . . . . . . . . . 14 |- ( ( C e. P. /\ ( B e. P. /\ g e. ( 1st ` B ) ) ) -> ( E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) <-> E. t E. h e. ( 1st ` C ) ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) ) )
4645anassrs 400 . . . . . . . . . . . . 13 |- ( ( ( C e. P. /\ B e. P. ) /\ g e. ( 1st ` B ) ) -> ( E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) <-> E. t E. h e. ( 1st ` C ) ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) ) )
4746rexbidva 2539 . . . . . . . . . . . 12 |- ( ( C e. P. /\ B e. P. ) -> ( E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) <-> E. g e. ( 1st ` B ) E. t E. h e. ( 1st ` C ) ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) ) )
4847ancoms 268 . . . . . . . . . . 11 |- ( ( B e. P. /\ C e. P. ) -> ( E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) <-> E. g e. ( 1st ` B ) E. t E. h e. ( 1st ` C ) ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) ) )
49 rexcom4 2837 . . . . . . . . . . 11 |- ( E. g e. ( 1st ` B ) E. t E. h e. ( 1st ` C ) ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) <-> E. t E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) )
5048, 49bitrdi 196 . . . . . . . . . 10 |- ( ( B e. P. /\ C e. P. ) -> ( E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) <-> E. t E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) ) )
5150adantr 276 . . . . . . . . 9 |- ( ( ( B e. P. /\ C e. P. ) /\ f e. Q. ) -> ( E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) <-> E. t E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) ( t = ( g G h ) /\ x = ( ( f G g ) G h ) ) ) )
52 df-rex 2526 . . . . . . . . . . 11 |- ( E. t e. ( 1st ` ( B F C ) ) x = ( f G t ) <-> E. t ( t e. ( 1st ` ( B F C ) ) /\ x = ( f G t ) ) )
53 genpelvl.1 . . . . . . . . . . . . . 14 |- F = ( w e. P. , v e. P. |-> <. { x e. Q. | E. y e. Q. E. z e. Q. ( y e. ( 1st ` w ) /\ z e. ( 1st ` v ) /\ x = ( y G z ) ) } , { x e. Q. | E. y e. Q. E. z e. Q. ( y e. ( 2nd ` w ) /\ z e. ( 2nd ` v ) /\ x = ( y G z ) ) } >. )
5453, 32genpelvl 7827 . . . . . . . . . . . . 13 |- ( ( B e. P. /\ C e. P. ) -> ( t e. ( 1st ` ( B F C ) ) <-> E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) t = ( g G h ) ) )
5554anbi1d 465 . . . . . . . . . . . 12 |- ( ( B e. P. /\ C e. P. ) -> ( ( t e. ( 1st ` ( B F C ) ) /\ x = ( f G t ) ) <-> ( E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) t = ( g G h ) /\ x = ( f G t ) ) ) )
5655exbidv 1874 . . . . . . . . . . 11 |- ( ( B e. P. /\ C e. P. ) -> ( E. t ( t e. ( 1st ` ( B F C ) ) /\ x = ( f G t ) ) <-> E. t ( E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) t = ( g G h ) /\ x = ( f G t ) ) ) )
5752, 56bitrid 192 . . . . . . . . . 10 |- ( ( B e. P. /\ C e. P. ) -> ( E. t e. ( 1st ` ( B F C ) ) x = ( f G t ) <-> E. t ( E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) t = ( g G h ) /\ x = ( f G t ) ) ) )
5857adantr 276 . . . . . . . . 9 |- ( ( ( B e. P. /\ C e. P. ) /\ f e. Q. ) -> ( E. t e. ( 1st ` ( B F C ) ) x = ( f G t ) <-> E. t ( E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) t = ( g G h ) /\ x = ( f G t ) ) ) )
5931, 51, 583bitr4rd 221 . . . . . . . 8 |- ( ( ( B e. P. /\ C e. P. ) /\ f e. Q. ) -> ( E. t e. ( 1st ` ( B F C ) ) x = ( f G t ) <-> E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) ) )
603, 59sylan2 286 . . . . . . 7 |- ( ( ( B e. P. /\ C e. P. ) /\ ( A e. P. /\ f e. ( 1st ` A ) ) ) -> ( E. t e. ( 1st ` ( B F C ) ) x = ( f G t ) <-> E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) ) )
6160anassrs 400 . . . . . 6 |- ( ( ( ( B e. P. /\ C e. P. ) /\ A e. P. ) /\ f e. ( 1st ` A ) ) -> ( E. t e. ( 1st ` ( B F C ) ) x = ( f G t ) <-> E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) ) )
6261rexbidva 2539 . . . . 5 |- ( ( ( B e. P. /\ C e. P. ) /\ A e. P. ) -> ( E. f e. ( 1st ` A ) E. t e. ( 1st ` ( B F C ) ) x = ( f G t ) <-> E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) ) )
6362ancoms 268 . . . 4 |- ( ( A e. P. /\ ( B e. P. /\ C e. P. ) ) -> ( E. f e. ( 1st ` A ) E. t e. ( 1st ` ( B F C ) ) x = ( f G t ) <-> E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) ) )
64633impb 1226 . . 3 |- ( ( A e. P. /\ B e. P. /\ C e. P. ) -> ( E. f e. ( 1st ` A ) E. t e. ( 1st ` ( B F C ) ) x = ( f G t ) <-> E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) ) )
65 genpassg.5 . . . . . 6 |- ( ( f e. P. /\ g e. P. ) -> ( f F g ) e. P. )
6665caovcl 6209 . . . . 5 |- ( ( B e. P. /\ C e. P. ) -> ( B F C ) e. P. )
6753, 32genpelvl 7827 . . . . 5 |- ( ( A e. P. /\ ( B F C ) e. P. ) -> ( x e. ( 1st ` ( A F ( B F C ) ) ) <-> E. f e. ( 1st ` A ) E. t e. ( 1st ` ( B F C ) ) x = ( f G t ) ) )
6866, 67sylan2 286 . . . 4 |- ( ( A e. P. /\ ( B e. P. /\ C e. P. ) ) -> ( x e. ( 1st ` ( A F ( B F C ) ) ) <-> E. f e. ( 1st ` A ) E. t e. ( 1st ` ( B F C ) ) x = ( f G t ) ) )
69683impb 1226 . . 3 |- ( ( A e. P. /\ B e. P. /\ C e. P. ) -> ( x e. ( 1st ` ( A F ( B F C ) ) ) <-> E. f e. ( 1st ` A ) E. t e. ( 1st ` ( B F C ) ) x = ( f G t ) ) )
70 df-rex 2526 . . . . 5 |- ( E. t e. ( 1st ` ( A F B ) ) E. h e. ( 1st ` C ) x = ( t G h ) <-> E. t ( t e. ( 1st ` ( A F B ) ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) )
7153, 32genpelvl 7827 . . . . . . . 8 |- ( ( A e. P. /\ B e. P. ) -> ( t e. ( 1st ` ( A F B ) ) <-> E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) t = ( f G g ) ) )
72713adant3 1044 . . . . . . 7 |- ( ( A e. P. /\ B e. P. /\ C e. P. ) -> ( t e. ( 1st ` ( A F B ) ) <-> E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) t = ( f G g ) ) )
7372anbi1d 465 . . . . . 6 |- ( ( A e. P. /\ B e. P. /\ C e. P. ) -> ( ( t e. ( 1st ` ( A F B ) ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) <-> ( E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) ) )
7473exbidv 1874 . . . . 5 |- ( ( A e. P. /\ B e. P. /\ C e. P. ) -> ( E. t ( t e. ( 1st ` ( A F B ) ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) <-> E. t ( E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) ) )
7570, 74bitrid 192 . . . 4 |- ( ( A e. P. /\ B e. P. /\ C e. P. ) -> ( E. t e. ( 1st ` ( A F B ) ) E. h e. ( 1st ` C ) x = ( t G h ) <-> E. t ( E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) ) )
7665caovcl 6209 . . . . . 6 |- ( ( A e. P. /\ B e. P. ) -> ( A F B ) e. P. )
7753, 32genpelvl 7827 . . . . . 6 |- ( ( ( A F B ) e. P. /\ C e. P. ) -> ( x e. ( 1st ` ( ( A F B ) F C ) ) <-> E. t e. ( 1st ` ( A F B ) ) E. h e. ( 1st ` C ) x = ( t G h ) ) )
7876, 77sylan 283 . . . . 5 |- ( ( ( A e. P. /\ B e. P. ) /\ C e. P. ) -> ( x e. ( 1st ` ( ( A F B ) F C ) ) <-> E. t e. ( 1st ` ( A F B ) ) E. h e. ( 1st ` C ) x = ( t G h ) ) )
79783impa 1221 . . . 4 |- ( ( A e. P. /\ B e. P. /\ C e. P. ) -> ( x e. ( 1st ` ( ( A F B ) F C ) ) <-> E. t e. ( 1st ` ( A F B ) ) E. h e. ( 1st ` C ) x = ( t G h ) ) )
8032caovcl 6209 . . . . . . . . . . . . . . . . . . 19 |- ( ( f e. Q. /\ g e. Q. ) -> ( f G g ) e. Q. )
81 elisset 2828 . . . . . . . . . . . . . . . . . . 19 |- ( ( f G g ) e. Q. -> E. t t = ( f G g ) )
8280, 81syl 14 . . . . . . . . . . . . . . . . . 18 |- ( ( f e. Q. /\ g e. Q. ) -> E. t t = ( f G g ) )
8382biantrurd 305 . . . . . . . . . . . . . . . . 17 |- ( ( f e. Q. /\ g e. Q. ) -> ( E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) <-> ( E. t t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) ) ) )
84 oveq1 6057 . . . . . . . . . . . . . . . . . . . . . 22 |- ( t = ( f G g ) -> ( t G h ) = ( ( f G g ) G h ) )
8584eqeq2d 2244 . . . . . . . . . . . . . . . . . . . . 21 |- ( t = ( f G g ) -> ( x = ( t G h ) <-> x = ( ( f G g ) G h ) ) )
8685rexbidv 2543 . . . . . . . . . . . . . . . . . . . 20 |- ( t = ( f G g ) -> ( E. h e. ( 1st ` C ) x = ( t G h ) <-> E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) ) )
8786pm5.32i 454 . . . . . . . . . . . . . . . . . . 19 |- ( ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) <-> ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) ) )
8887exbii 1654 . . . . . . . . . . . . . . . . . 18 |- ( E. t ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) <-> E. t ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) ) )
89 19.41v 1952 . . . . . . . . . . . . . . . . . 18 |- ( E. t ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) ) <-> ( E. t t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) ) )
9088, 89bitri 184 . . . . . . . . . . . . . . . . 17 |- ( E. t ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) <-> ( E. t t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) ) )
9183, 90bitr4di 198 . . . . . . . . . . . . . . . 16 |- ( ( f e. Q. /\ g e. Q. ) -> ( E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) <-> E. t ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) ) )
926, 91sylan2 286 . . . . . . . . . . . . . . 15 |- ( ( f e. Q. /\ ( B e. P. /\ g e. ( 1st ` B ) ) ) -> ( E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) <-> E. t ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) ) )
9392anassrs 400 . . . . . . . . . . . . . 14 |- ( ( ( f e. Q. /\ B e. P. ) /\ g e. ( 1st ` B ) ) -> ( E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) <-> E. t ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) ) )
9493rexbidva 2539 . . . . . . . . . . . . 13 |- ( ( f e. Q. /\ B e. P. ) -> ( E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) <-> E. g e. ( 1st ` B ) E. t ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) ) )
95 rexcom4 2837 . . . . . . . . . . . . 13 |- ( E. g e. ( 1st ` B ) E. t ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) <-> E. t E. g e. ( 1st ` B ) ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) )
9694, 95bitrdi 196 . . . . . . . . . . . 12 |- ( ( f e. Q. /\ B e. P. ) -> ( E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) <-> E. t E. g e. ( 1st ` B ) ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) ) )
9796ancoms 268 . . . . . . . . . . 11 |- ( ( B e. P. /\ f e. Q. ) -> ( E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) <-> E. t E. g e. ( 1st ` B ) ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) ) )
983, 97sylan2 286 . . . . . . . . . 10 |- ( ( B e. P. /\ ( A e. P. /\ f e. ( 1st ` A ) ) ) -> ( E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) <-> E. t E. g e. ( 1st ` B ) ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) ) )
9998anassrs 400 . . . . . . . . 9 |- ( ( ( B e. P. /\ A e. P. ) /\ f e. ( 1st ` A ) ) -> ( E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) <-> E. t E. g e. ( 1st ` B ) ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) ) )
10099rexbidva 2539 . . . . . . . 8 |- ( ( B e. P. /\ A e. P. ) -> ( E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) <-> E. f e. ( 1st ` A ) E. t E. g e. ( 1st ` B ) ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) ) )
101 rexcom4 2837 . . . . . . . 8 |- ( E. f e. ( 1st ` A ) E. t E. g e. ( 1st ` B ) ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) <-> E. t E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) )
102100, 101bitrdi 196 . . . . . . 7 |- ( ( B e. P. /\ A e. P. ) -> ( E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) <-> E. t E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) ) )
103 r19.41v 2699 . . . . . . . . . 10 |- ( E. g e. ( 1st ` B ) ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) <-> ( E. g e. ( 1st ` B ) t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) )
104103rexbii 2549 . . . . . . . . 9 |- ( E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) <-> E. f e. ( 1st ` A ) ( E. g e. ( 1st ` B ) t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) )
105 r19.41v 2699 . . . . . . . . 9 |- ( E. f e. ( 1st ` A ) ( E. g e. ( 1st ` B ) t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) <-> ( E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) )
106104, 105bitri 184 . . . . . . . 8 |- ( E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) <-> ( E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) )
107106exbii 1654 . . . . . . 7 |- ( E. t E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) ( t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) <-> E. t ( E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) )
108102, 107bitrdi 196 . . . . . 6 |- ( ( B e. P. /\ A e. P. ) -> ( E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) <-> E. t ( E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) ) )
109108ancoms 268 . . . . 5 |- ( ( A e. P. /\ B e. P. ) -> ( E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) <-> E. t ( E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) ) )
1101093adant3 1044 . . . 4 |- ( ( A e. P. /\ B e. P. /\ C e. P. ) -> ( E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) <-> E. t ( E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) t = ( f G g ) /\ E. h e. ( 1st ` C ) x = ( t G h ) ) ) )
11175, 79, 1103bitr4d 220 . . 3 |- ( ( A e. P. /\ B e. P. /\ C e. P. ) -> ( x e. ( 1st ` ( ( A F B ) F C ) ) <-> E. f e. ( 1st ` A ) E. g e. ( 1st ` B ) E. h e. ( 1st ` C ) x = ( ( f G g ) G h ) ) )
11264, 69, 1113bitr4rd 221 . 2 |- ( ( A e. P. /\ B e. P. /\ C e. P. ) -> ( x e. ( 1st ` ( ( A F B ) F C ) ) <-> x e. ( 1st ` ( A F ( B F C ) ) ) ) )
113112eqrdv 2230 1 |- ( ( A e. P. /\ B e. P. /\ C e. P. ) -> ( 1st ` ( ( A F B ) F C ) ) = ( 1st ` ( A F ( B F C ) ) ) )
Colors of variables: wff set class
Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   /\ w3a 1005   = wceq 1398   E.wex 1541   e. wcel 2203   E.wrex 2521   {crab 2524   <.cop 3692   X. cxp 4747   dom cdm 4749   ` cfv 5352  (class class class)co 6050   e. cmpo 6052   1stc1st 6332   2ndc2nd 6333   Q.cnq 7595   P.cnp 7606
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2205  ax-14 2206  ax-ext 2214  ax-coll 4225  ax-sep 4228  ax-pow 4287  ax-pr 4322  ax-un 4554  ax-setind 4659  ax-iinf 4710
This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ne 2413  df-ral 2525  df-rex 2526  df-reu 2527  df-rab 2529  df-v 2815  df-sbc 3043  df-csb 3139  df-dif 3213  df-un 3215  df-in 3217  df-ss 3224  df-pw 3671  df-sn 3695  df-pr 3696  df-op 3698  df-uni 3915  df-int 3950  df-iun 3993  df-br 4110  df-opab 4172  df-mpt 4173  df-id 4414  df-iom 4713  df-xp 4755  df-rel 4756  df-cnv 4757  df-co 4758  df-dm 4759  df-rn 4760  df-res 4761  df-ima 4762  df-iota 5312  df-fun 5354  df-fn 5355  df-f 5356  df-f1 5357  df-fo 5358  df-f1o 5359  df-fv 5360  df-ov 6053  df-oprab 6054  df-mpo 6055  df-1st 6334  df-2nd 6335  df-qs 6773  df-ni 7619  df-nqqs 7663  df-inp 7781
This theorem is referenced by:  genpassg  7841
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