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Theorem fmptco 7071
Description: Composition of two functions expressed as ordered-pair class abstractions. If 𝐹 has the equation (𝑥 + 2) and 𝐺 the equation (3∗𝑧) then (𝐺𝐹) has the equation (3∗(𝑥 + 2)). (Contributed by FL, 21-Jun-2012.) (Revised by Mario Carneiro, 24-Jul-2014.)
Hypotheses
Ref Expression
fmptco.1 ((𝜑𝑥𝐴) → 𝑅𝐵)
fmptco.2 (𝜑𝐹 = (𝑥𝐴𝑅))
fmptco.3 (𝜑𝐺 = (𝑦𝐵𝑆))
fmptco.4 (𝑦 = 𝑅𝑆 = 𝑇)
Assertion
Ref Expression
fmptco (𝜑 → (𝐺𝐹) = (𝑥𝐴𝑇))
Distinct variable groups:   𝑥,𝐴   𝑥,𝑦,𝐵   𝑦,𝑅   𝜑,𝑥   𝑥,𝑆   𝑦,𝑇
Allowed substitution hints:   𝜑(𝑦)   𝐴(𝑦)   𝑅(𝑥)   𝑆(𝑦)   𝑇(𝑥)   𝐹(𝑥,𝑦)   𝐺(𝑥,𝑦)

Proof of Theorem fmptco
Dummy variables 𝑣 𝑢 𝑤 𝑧 are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 relco 6060 . 2 Rel (𝐺𝐹)
2 mptrel 5768 . 2 Rel (𝑥𝐴𝑇)
3 fmptco.2 . . . . . . . . . . . 12 (𝜑𝐹 = (𝑥𝐴𝑅))
4 fmptco.1 . . . . . . . . . . . 12 ((𝜑𝑥𝐴) → 𝑅𝐵)
53, 4fmpt3d 7057 . . . . . . . . . . 11 (𝜑𝐹:𝐴𝐵)
65ffund 6659 . . . . . . . . . 10 (𝜑 → Fun 𝐹)
7 funbrfv 6875 . . . . . . . . . . 11 (Fun 𝐹 → (𝑧𝐹𝑢 → (𝐹𝑧) = 𝑢))
87imp 407 . . . . . . . . . 10 ((Fun 𝐹𝑧𝐹𝑢) → (𝐹𝑧) = 𝑢)
96, 8sylan 586 . . . . . . . . 9 ((𝜑𝑧𝐹𝑢) → (𝐹𝑧) = 𝑢)
109eqcomd 2745 . . . . . . . 8 ((𝜑𝑧𝐹𝑢) → 𝑢 = (𝐹𝑧))
1110a1d 25 . . . . . . 7 ((𝜑𝑧𝐹𝑢) → (𝑢𝐺𝑤𝑢 = (𝐹𝑧)))
1211expimpd 454 . . . . . 6 (𝜑 → ((𝑧𝐹𝑢𝑢𝐺𝑤) → 𝑢 = (𝐹𝑧)))
1312pm4.71rd 567 . . . . 5 (𝜑 → ((𝑧𝐹𝑢𝑢𝐺𝑤) ↔ (𝑢 = (𝐹𝑧) ∧ (𝑧𝐹𝑢𝑢𝐺𝑤))))
1413exbidv 1928 . . . 4 (𝜑 → (∃𝑢(𝑧𝐹𝑢𝑢𝐺𝑤) ↔ ∃𝑢(𝑢 = (𝐹𝑧) ∧ (𝑧𝐹𝑢𝑢𝐺𝑤))))
15 fvex 6840 . . . . . 6 (𝐹𝑧) ∈ V
16 breq2 5076 . . . . . . 7 (𝑢 = (𝐹𝑧) → (𝑧𝐹𝑢𝑧𝐹(𝐹𝑧)))
17 breq1 5075 . . . . . . 7 (𝑢 = (𝐹𝑧) → (𝑢𝐺𝑤 ↔ (𝐹𝑧)𝐺𝑤))
1816, 17anbi12d 638 . . . . . 6 (𝑢 = (𝐹𝑧) → ((𝑧𝐹𝑢𝑢𝐺𝑤) ↔ (𝑧𝐹(𝐹𝑧) ∧ (𝐹𝑧)𝐺𝑤)))
1915, 18ceqsexv 3479 . . . . 5 (∃𝑢(𝑢 = (𝐹𝑧) ∧ (𝑧𝐹𝑢𝑢𝐺𝑤)) ↔ (𝑧𝐹(𝐹𝑧) ∧ (𝐹𝑧)𝐺𝑤))
20 funfvbrb 6992 . . . . . . . . 9 (Fun 𝐹 → (𝑧 ∈ dom 𝐹𝑧𝐹(𝐹𝑧)))
216, 20syl 17 . . . . . . . 8 (𝜑 → (𝑧 ∈ dom 𝐹𝑧𝐹(𝐹𝑧)))
225fdmd 6665 . . . . . . . . 9 (𝜑 → dom 𝐹 = 𝐴)
2322eleq2d 2825 . . . . . . . 8 (𝜑 → (𝑧 ∈ dom 𝐹𝑧𝐴))
2421, 23bitr3d 282 . . . . . . 7 (𝜑 → (𝑧𝐹(𝐹𝑧) ↔ 𝑧𝐴))
253fveq1d 6829 . . . . . . . 8 (𝜑 → (𝐹𝑧) = ((𝑥𝐴𝑅)‘𝑧))
26 fmptco.3 . . . . . . . 8 (𝜑𝐺 = (𝑦𝐵𝑆))
27 eqidd 2740 . . . . . . . 8 (𝜑𝑤 = 𝑤)
2825, 26, 27breq123d 5086 . . . . . . 7 (𝜑 → ((𝐹𝑧)𝐺𝑤 ↔ ((𝑥𝐴𝑅)‘𝑧)(𝑦𝐵𝑆)𝑤))
2924, 28anbi12d 638 . . . . . 6 (𝜑 → ((𝑧𝐹(𝐹𝑧) ∧ (𝐹𝑧)𝐺𝑤) ↔ (𝑧𝐴 ∧ ((𝑥𝐴𝑅)‘𝑧)(𝑦𝐵𝑆)𝑤)))
30 nfcv 2901 . . . . . . . . 9 𝑥𝑧
31 nfv 1921 . . . . . . . . . 10 𝑥𝜑
32 nffvmpt1 6838 . . . . . . . . . . . 12 𝑥((𝑥𝐴𝑅)‘𝑧)
33 nfcv 2901 . . . . . . . . . . . 12 𝑥(𝑦𝐵𝑆)
34 nfcv 2901 . . . . . . . . . . . 12 𝑥𝑤
3532, 33, 34nfbr 5119 . . . . . . . . . . 11 𝑥((𝑥𝐴𝑅)‘𝑧)(𝑦𝐵𝑆)𝑤
36 nfcsb1v 3855 . . . . . . . . . . . 12 𝑥𝑧 / 𝑥𝑇
3736nfeq2 2918 . . . . . . . . . . 11 𝑥 𝑤 = 𝑧 / 𝑥𝑇
3835, 37nfbi 1910 . . . . . . . . . 10 𝑥(((𝑥𝐴𝑅)‘𝑧)(𝑦𝐵𝑆)𝑤𝑤 = 𝑧 / 𝑥𝑇)
3931, 38nfim 1903 . . . . . . . . 9 𝑥(𝜑 → (((𝑥𝐴𝑅)‘𝑧)(𝑦𝐵𝑆)𝑤𝑤 = 𝑧 / 𝑥𝑇))
40 fveq2 6827 . . . . . . . . . . . 12 (𝑥 = 𝑧 → ((𝑥𝐴𝑅)‘𝑥) = ((𝑥𝐴𝑅)‘𝑧))
4140breq1d 5082 . . . . . . . . . . 11 (𝑥 = 𝑧 → (((𝑥𝐴𝑅)‘𝑥)(𝑦𝐵𝑆)𝑤 ↔ ((𝑥𝐴𝑅)‘𝑧)(𝑦𝐵𝑆)𝑤))
42 csbeq1a 3845 . . . . . . . . . . . 12 (𝑥 = 𝑧𝑇 = 𝑧 / 𝑥𝑇)
4342eqeq2d 2750 . . . . . . . . . . 11 (𝑥 = 𝑧 → (𝑤 = 𝑇𝑤 = 𝑧 / 𝑥𝑇))
4441, 43bibi12d 346 . . . . . . . . . 10 (𝑥 = 𝑧 → ((((𝑥𝐴𝑅)‘𝑥)(𝑦𝐵𝑆)𝑤𝑤 = 𝑇) ↔ (((𝑥𝐴𝑅)‘𝑧)(𝑦𝐵𝑆)𝑤𝑤 = 𝑧 / 𝑥𝑇)))
4544imbi2d 341 . . . . . . . . 9 (𝑥 = 𝑧 → ((𝜑 → (((𝑥𝐴𝑅)‘𝑥)(𝑦𝐵𝑆)𝑤𝑤 = 𝑇)) ↔ (𝜑 → (((𝑥𝐴𝑅)‘𝑧)(𝑦𝐵𝑆)𝑤𝑤 = 𝑧 / 𝑥𝑇))))
46 vex 3435 . . . . . . . . . . . 12 𝑤 ∈ V
47 simpl 483 . . . . . . . . . . . . . . 15 ((𝑦 = 𝑅𝑢 = 𝑤) → 𝑦 = 𝑅)
4847eleq1d 2824 . . . . . . . . . . . . . 14 ((𝑦 = 𝑅𝑢 = 𝑤) → (𝑦𝐵𝑅𝐵))
49 id 22 . . . . . . . . . . . . . . 15 (𝑢 = 𝑤𝑢 = 𝑤)
50 fmptco.4 . . . . . . . . . . . . . . 15 (𝑦 = 𝑅𝑆 = 𝑇)
5149, 50eqeqan12rd 2754 . . . . . . . . . . . . . 14 ((𝑦 = 𝑅𝑢 = 𝑤) → (𝑢 = 𝑆𝑤 = 𝑇))
5248, 51anbi12d 638 . . . . . . . . . . . . 13 ((𝑦 = 𝑅𝑢 = 𝑤) → ((𝑦𝐵𝑢 = 𝑆) ↔ (𝑅𝐵𝑤 = 𝑇)))
53 df-mpt 5154 . . . . . . . . . . . . 13 (𝑦𝐵𝑆) = {⟨𝑦, 𝑢⟩ ∣ (𝑦𝐵𝑢 = 𝑆)}
5452, 53brabga 5476 . . . . . . . . . . . 12 ((𝑅𝐵𝑤 ∈ V) → (𝑅(𝑦𝐵𝑆)𝑤 ↔ (𝑅𝐵𝑤 = 𝑇)))
554, 46, 54sylancl 592 . . . . . . . . . . 11 ((𝜑𝑥𝐴) → (𝑅(𝑦𝐵𝑆)𝑤 ↔ (𝑅𝐵𝑤 = 𝑇)))
56 id 22 . . . . . . . . . . . . 13 (𝑥𝐴𝑥𝐴)
57 eqid 2739 . . . . . . . . . . . . . 14 (𝑥𝐴𝑅) = (𝑥𝐴𝑅)
5857fvmpt2 6947 . . . . . . . . . . . . 13 ((𝑥𝐴𝑅𝐵) → ((𝑥𝐴𝑅)‘𝑥) = 𝑅)
5956, 4, 58syl2an2 692 . . . . . . . . . . . 12 ((𝜑𝑥𝐴) → ((𝑥𝐴𝑅)‘𝑥) = 𝑅)
6059breq1d 5082 . . . . . . . . . . 11 ((𝜑𝑥𝐴) → (((𝑥𝐴𝑅)‘𝑥)(𝑦𝐵𝑆)𝑤𝑅(𝑦𝐵𝑆)𝑤))
614biantrurd 537 . . . . . . . . . . 11 ((𝜑𝑥𝐴) → (𝑤 = 𝑇 ↔ (𝑅𝐵𝑤 = 𝑇)))
6255, 60, 613bitr4d 312 . . . . . . . . . 10 ((𝜑𝑥𝐴) → (((𝑥𝐴𝑅)‘𝑥)(𝑦𝐵𝑆)𝑤𝑤 = 𝑇))
6362expcom 414 . . . . . . . . 9 (𝑥𝐴 → (𝜑 → (((𝑥𝐴𝑅)‘𝑥)(𝑦𝐵𝑆)𝑤𝑤 = 𝑇)))
6430, 39, 45, 63vtoclgaf 3519 . . . . . . . 8 (𝑧𝐴 → (𝜑 → (((𝑥𝐴𝑅)‘𝑧)(𝑦𝐵𝑆)𝑤𝑤 = 𝑧 / 𝑥𝑇)))
6564impcom 408 . . . . . . 7 ((𝜑𝑧𝐴) → (((𝑥𝐴𝑅)‘𝑧)(𝑦𝐵𝑆)𝑤𝑤 = 𝑧 / 𝑥𝑇))
6665pm5.32da 584 . . . . . 6 (𝜑 → ((𝑧𝐴 ∧ ((𝑥𝐴𝑅)‘𝑧)(𝑦𝐵𝑆)𝑤) ↔ (𝑧𝐴𝑤 = 𝑧 / 𝑥𝑇)))
6729, 66bitrd 280 . . . . 5 (𝜑 → ((𝑧𝐹(𝐹𝑧) ∧ (𝐹𝑧)𝐺𝑤) ↔ (𝑧𝐴𝑤 = 𝑧 / 𝑥𝑇)))
6819, 67bitrid 284 . . . 4 (𝜑 → (∃𝑢(𝑢 = (𝐹𝑧) ∧ (𝑧𝐹𝑢𝑢𝐺𝑤)) ↔ (𝑧𝐴𝑤 = 𝑧 / 𝑥𝑇)))
6914, 68bitrd 280 . . 3 (𝜑 → (∃𝑢(𝑧𝐹𝑢𝑢𝐺𝑤) ↔ (𝑧𝐴𝑤 = 𝑧 / 𝑥𝑇)))
70 vex 3435 . . . 4 𝑧 ∈ V
7170, 46opelco 5813 . . 3 (⟨𝑧, 𝑤⟩ ∈ (𝐺𝐹) ↔ ∃𝑢(𝑧𝐹𝑢𝑢𝐺𝑤))
72 df-mpt 5154 . . . . 5 (𝑥𝐴𝑇) = {⟨𝑥, 𝑣⟩ ∣ (𝑥𝐴𝑣 = 𝑇)}
7372eleq2i 2831 . . . 4 (⟨𝑧, 𝑤⟩ ∈ (𝑥𝐴𝑇) ↔ ⟨𝑧, 𝑤⟩ ∈ {⟨𝑥, 𝑣⟩ ∣ (𝑥𝐴𝑣 = 𝑇)})
74 nfv 1921 . . . . . 6 𝑥 𝑧𝐴
7536nfeq2 2918 . . . . . 6 𝑥 𝑣 = 𝑧 / 𝑥𝑇
7674, 75nfan 1906 . . . . 5 𝑥(𝑧𝐴𝑣 = 𝑧 / 𝑥𝑇)
77 nfv 1921 . . . . 5 𝑣(𝑧𝐴𝑤 = 𝑧 / 𝑥𝑇)
78 eleq1w 2822 . . . . . 6 (𝑥 = 𝑧 → (𝑥𝐴𝑧𝐴))
7942eqeq2d 2750 . . . . . 6 (𝑥 = 𝑧 → (𝑣 = 𝑇𝑣 = 𝑧 / 𝑥𝑇))
8078, 79anbi12d 638 . . . . 5 (𝑥 = 𝑧 → ((𝑥𝐴𝑣 = 𝑇) ↔ (𝑧𝐴𝑣 = 𝑧 / 𝑥𝑇)))
81 eqeq1 2743 . . . . . 6 (𝑣 = 𝑤 → (𝑣 = 𝑧 / 𝑥𝑇𝑤 = 𝑧 / 𝑥𝑇))
8281anbi2d 636 . . . . 5 (𝑣 = 𝑤 → ((𝑧𝐴𝑣 = 𝑧 / 𝑥𝑇) ↔ (𝑧𝐴𝑤 = 𝑧 / 𝑥𝑇)))
8376, 77, 70, 46, 80, 82opelopabf 5487 . . . 4 (⟨𝑧, 𝑤⟩ ∈ {⟨𝑥, 𝑣⟩ ∣ (𝑥𝐴𝑣 = 𝑇)} ↔ (𝑧𝐴𝑤 = 𝑧 / 𝑥𝑇))
8473, 83bitri 276 . . 3 (⟨𝑧, 𝑤⟩ ∈ (𝑥𝐴𝑇) ↔ (𝑧𝐴𝑤 = 𝑧 / 𝑥𝑇))
8569, 71, 843bitr4g 315 . 2 (𝜑 → (⟨𝑧, 𝑤⟩ ∈ (𝐺𝐹) ↔ ⟨𝑧, 𝑤⟩ ∈ (𝑥𝐴𝑇)))
861, 2, 85eqrelrdv 5735 1 (𝜑 → (𝐺𝐹) = (𝑥𝐴𝑇))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 207  wa 396   = wceq 1547  wex 1786  wcel 2119  Vcvv 3431  csb 3831  cop 4561   class class class wbr 5072  {copab 5134  cmpt 5153  dom cdm 5618  ccom 5622  Fun wfun 6479  cfv 6485
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1917  ax-6 1974  ax-7 2015  ax-8 2121  ax-9 2129  ax-10 2152  ax-11 2168  ax-12 2189  ax-ext 2711  ax-sep 5218  ax-nul 5228  ax-pr 5362
This theorem depends on definitions:  df-bi 208  df-an 397  df-or 854  df-3an 1094  df-tru 1550  df-fal 1560  df-ex 1787  df-nf 1791  df-sb 2074  df-mo 2543  df-eu 2573  df-clab 2718  df-cleq 2731  df-clel 2814  df-nfc 2888  df-ne 2935  df-ral 3054  df-rex 3064  df-rab 3392  df-v 3433  df-sbc 3724  df-csb 3832  df-dif 3886  df-un 3888  df-in 3890  df-ss 3900  df-nul 4262  df-if 4455  df-sn 4556  df-pr 4558  df-op 4562  df-uni 4839  df-br 5073  df-opab 5135  df-mpt 5154  df-id 5513  df-xp 5624  df-rel 5625  df-cnv 5626  df-co 5627  df-dm 5628  df-rn 5629  df-res 5630  df-ima 5631  df-iota 6441  df-fun 6487  df-fn 6488  df-f 6489  df-fv 6493
This theorem is referenced by:  fmptcof  7072  cofmpt  7074  fcompt  7075  fcoconst  7076  ofco  7645  ccatco  14788  rlimcn1  15541  rlimdiv  15599  ackbijnn  15784  setcepi  18046  prf1st  18161  prf2nd  18162  hofcllem  18215  prdsidlem  18728  pws0g  18732  mhmvlin  18760  pwsco1mhm  18791  pwsco2mhm  18792  smndex1iidm  18860  smndex2dlinvh  18879  pwsinvg  19020  pwssub  19021  ghmquskerco  19250  galactghm  19370  efginvrel1  19694  frgpup3lem  19743  gsumzf1o  19878  gsumconst  19900  gsummptshft  19902  gsumzmhm  19903  gsummhm2  19905  gsummptmhm  19906  gsumsub  19914  gsum2dlem2  19937  dprdfsub  19989  lmhmvsca  21035  frgpcyg  21548  evpmodpmf1o  21571  psrass1lem  21908  psrlinv  21930  psrcom  21942  evlslem2  22055  selvvvval  22118  psdmplcl  22150  psdmul  22154  coe1fval3  22193  psropprmul  22222  coe1z  22249  coe1mul2  22255  coe1tm  22259  ply1coe  22284  evls1sca  22309  ofco2  22434  mdetleib2  22571  mdetralt  22591  smadiadetlem3  22651  ptrescn  23622  lmcn2  23632  qtopeu  23699  flfcnp2  23990  tgpconncomp  24096  tsmssub  24132  tsmsxplem1  24136  negfcncf  24908  pcopt  25007  pcopt2  25008  pi1xfrcnvlem  25041  ovolctb  25475  ovolfs2  25556  uniioombllem2  25568  ismbf  25613  mbfconst  25618  limccnp2  25877  limcco  25878  dvcof  25933  dvcj  25935  dvfre  25936  dvmptcj  25953  dvmptco  25957  dvcnvlem  25961  dvlip  25978  dvlipcn  25979  itgsubstlem  26033  plyco  26224  dgrcolem1  26256  dgrcolem2  26257  dgrco  26258  plycjlem  26259  taylply2  26351  logcn  26629  leibpi  26924  efrlim  26951  jensenlem2  26969  amgmlem  26971  ftalem7  27060  dchrisum0  27501  gsumwrd2dccat  33159  mplvrpmfgalem  33728  psrmonprod  33736  esplyfval0  33748  esplyfvaln  33758  ofcfval4  34289  eulerpartgbij  34556  dstfrvclim1  34662  cvmliftlem6  35518  cvmliftphtlem  35545  cvmlift3lem5  35551  elmsubrn  35756  msubco  35759  circum  35902  mblfinlem2  38025  volsupnfl  38032  itgaddnc  38047  itgmulc2nc  38055  ftc1anclem1  38060  ftc1anclem2  38061  ftc1anclem3  38062  ftc1anclem4  38063  ftc1anclem5  38064  ftc1anclem7  38066  ftc1anclem8  38067  fnopabco  38090  upixp  38096  aks6d1c6lem4  42658  evlselv  43039  mendassa  43635  fsovrfovd  44453  fsovcnvlem  44457  cncfcompt  46326  dvcosax  46369  dirkercncflem4  46549  fourierdlem111  46660  meadjiunlem  46908  meadjiun  46909  fundcmpsurbijinjpreimafv  47882  itcovalpclem2  49162  itcovalt2lem2  49167  amgmwlem  50292  amgmlemALT  50293
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