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Theorem fmptco 7126
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 6108 . 2 Rel (𝐺𝐹)
2 mptrel 5810 . 2 Rel (𝑥𝐴𝑇)
3 fmptco.2 . . . . . . . . . . . 12 (𝜑𝐹 = (𝑥𝐴𝑅))
4 fmptco.1 . . . . . . . . . . . 12 ((𝜑𝑥𝐴) → 𝑅𝐵)
53, 4fmpt3d 7112 . . . . . . . . . . 11 (𝜑𝐹:𝐴𝐵)
65ffund 6711 . . . . . . . . . 10 (𝜑 → Fun 𝐹)
7 funbrfv 6930 . . . . . . . . . . 11 (Fun 𝐹 → (𝑧𝐹𝑢 → (𝐹𝑧) = 𝑢))
87imp 412 . . . . . . . . . 10 ((Fun 𝐹𝑧𝐹𝑢) → (𝐹𝑧) = 𝑢)
96, 8sylan 592 . . . . . . . . 9 ((𝜑𝑧𝐹𝑢) → (𝐹𝑧) = 𝑢)
109eqcomd 2768 . . . . . . . 8 ((𝜑𝑧𝐹𝑢) → 𝑢 = (𝐹𝑧))
1110a1d 26 . . . . . . 7 ((𝜑𝑧𝐹𝑢) → (𝑢𝐺𝑤𝑢 = (𝐹𝑧)))
1211expimpd 459 . . . . . 6 (𝜑 → ((𝑧𝐹𝑢𝑢𝐺𝑤) → 𝑢 = (𝐹𝑧)))
1312pm4.71rd 572 . . . . 5 (𝜑 → ((𝑧𝐹𝑢𝑢𝐺𝑤) ↔ (𝑢 = (𝐹𝑧) ∧ (𝑧𝐹𝑢𝑢𝐺𝑤))))
1413exbidv 1954 . . . 4 (𝜑 → (∃𝑢(𝑧𝐹𝑢𝑢𝐺𝑤) ↔ ∃𝑢(𝑢 = (𝐹𝑧) ∧ (𝑧𝐹𝑢𝑢𝐺𝑤))))
15 fvex 6895 . . . . . 6 (𝐹𝑧) ∈ V
16 breq2 5111 . . . . . . 7 (𝑢 = (𝐹𝑧) → (𝑧𝐹𝑢𝑧𝐹(𝐹𝑧)))
17 breq1 5110 . . . . . . 7 (𝑢 = (𝐹𝑧) → (𝑢𝐺𝑤 ↔ (𝐹𝑧)𝐺𝑤))
1816, 17anbi12d 644 . . . . . 6 (𝑢 = (𝐹𝑧) → ((𝑧𝐹𝑢𝑢𝐺𝑤) ↔ (𝑧𝐹(𝐹𝑧) ∧ (𝐹𝑧)𝐺𝑤)))
1915, 18ceqsexv 3501 . . . . 5 (∃𝑢(𝑢 = (𝐹𝑧) ∧ (𝑧𝐹𝑢𝑢𝐺𝑤)) ↔ (𝑧𝐹(𝐹𝑧) ∧ (𝐹𝑧)𝐺𝑤))
20 funfvbrb 7047 . . . . . . . . 9 (Fun 𝐹 → (𝑧 ∈ dom 𝐹𝑧𝐹(𝐹𝑧)))
216, 20syl 18 . . . . . . . 8 (𝜑 → (𝑧 ∈ dom 𝐹𝑧𝐹(𝐹𝑧)))
225fdmd 6717 . . . . . . . . 9 (𝜑 → dom 𝐹 = 𝐴)
2322eleq2d 2848 . . . . . . . 8 (𝜑 → (𝑧 ∈ dom 𝐹𝑧𝐴))
2421, 23bitr3d 284 . . . . . . 7 (𝜑 → (𝑧𝐹(𝐹𝑧) ↔ 𝑧𝐴))
253fveq1d 6884 . . . . . . . 8 (𝜑 → (𝐹𝑧) = ((𝑥𝐴𝑅)‘𝑧))
26 fmptco.3 . . . . . . . 8 (𝜑𝐺 = (𝑦𝐵𝑆))
27 eqidd 2763 . . . . . . . 8 (𝜑𝑤 = 𝑤)
2825, 26, 27breq123d 5121 . . . . . . 7 (𝜑 → ((𝐹𝑧)𝐺𝑤 ↔ ((𝑥𝐴𝑅)‘𝑧)(𝑦𝐵𝑆)𝑤))
2924, 28anbi12d 644 . . . . . 6 (𝜑 → ((𝑧𝐹(𝐹𝑧) ∧ (𝐹𝑧)𝐺𝑤) ↔ (𝑧𝐴 ∧ ((𝑥𝐴𝑅)‘𝑧)(𝑦𝐵𝑆)𝑤)))
30 nfcv 2924 . . . . . . . . 9 𝑥𝑧
31 nfv 1947 . . . . . . . . . 10 𝑥𝜑
32 nffvmpt1 6893 . . . . . . . . . . . 12 𝑥((𝑥𝐴𝑅)‘𝑧)
33 nfcv 2924 . . . . . . . . . . . 12 𝑥(𝑦𝐵𝑆)
34 nfcv 2924 . . . . . . . . . . . 12 𝑥𝑤
3532, 33, 34nfbr 5156 . . . . . . . . . . 11 𝑥((𝑥𝐴𝑅)‘𝑧)(𝑦𝐵𝑆)𝑤
36 nfcsb1v 3874 . . . . . . . . . . . 12 𝑥𝑧 / 𝑥𝑇
3736nfeq2 2941 . . . . . . . . . . 11 𝑥 𝑤 = 𝑧 / 𝑥𝑇
3835, 37nfbi 1936 . . . . . . . . . 10 𝑥(((𝑥𝐴𝑅)‘𝑧)(𝑦𝐵𝑆)𝑤𝑤 = 𝑧 / 𝑥𝑇)
3931, 38nfim 1929 . . . . . . . . 9 𝑥(𝜑 → (((𝑥𝐴𝑅)‘𝑧)(𝑦𝐵𝑆)𝑤𝑤 = 𝑧 / 𝑥𝑇))
40 fveq2 6882 . . . . . . . . . . . 12 (𝑥 = 𝑧 → ((𝑥𝐴𝑅)‘𝑥) = ((𝑥𝐴𝑅)‘𝑧))
4140breq1d 5117 . . . . . . . . . . 11 (𝑥 = 𝑧 → (((𝑥𝐴𝑅)‘𝑥)(𝑦𝐵𝑆)𝑤 ↔ ((𝑥𝐴𝑅)‘𝑧)(𝑦𝐵𝑆)𝑤))
42 csbeq1a 3864 . . . . . . . . . . . 12 (𝑥 = 𝑧𝑇 = 𝑧 / 𝑥𝑇)
4342eqeq2d 2773 . . . . . . . . . . 11 (𝑥 = 𝑧 → (𝑤 = 𝑇𝑤 = 𝑧 / 𝑥𝑇))
4441, 43bibi12d 348 . . . . . . . . . 10 (𝑥 = 𝑧 → ((((𝑥𝐴𝑅)‘𝑥)(𝑦𝐵𝑆)𝑤𝑤 = 𝑇) ↔ (((𝑥𝐴𝑅)‘𝑧)(𝑦𝐵𝑆)𝑤𝑤 = 𝑧 / 𝑥𝑇)))
4544imbi2d 343 . . . . . . . . 9 (𝑥 = 𝑧 → ((𝜑 → (((𝑥𝐴𝑅)‘𝑥)(𝑦𝐵𝑆)𝑤𝑤 = 𝑇)) ↔ (𝜑 → (((𝑥𝐴𝑅)‘𝑧)(𝑦𝐵𝑆)𝑤𝑤 = 𝑧 / 𝑥𝑇))))
46 vex 3457 . . . . . . . . . . . 12 𝑤 ∈ V
47 simpl 488 . . . . . . . . . . . . . . 15 ((𝑦 = 𝑅𝑢 = 𝑤) → 𝑦 = 𝑅)
4847eleq1d 2847 . . . . . . . . . . . . . 14 ((𝑦 = 𝑅𝑢 = 𝑤) → (𝑦𝐵𝑅𝐵))
49 id 23 . . . . . . . . . . . . . . 15 (𝑢 = 𝑤𝑢 = 𝑤)
50 fmptco.4 . . . . . . . . . . . . . . 15 (𝑦 = 𝑅𝑆 = 𝑇)
5149, 50eqeqan12rd 2777 . . . . . . . . . . . . . 14 ((𝑦 = 𝑅𝑢 = 𝑤) → (𝑢 = 𝑆𝑤 = 𝑇))
5248, 51anbi12d 644 . . . . . . . . . . . . 13 ((𝑦 = 𝑅𝑢 = 𝑤) → ((𝑦𝐵𝑢 = 𝑆) ↔ (𝑅𝐵𝑤 = 𝑇)))
53 df-mpt 5191 . . . . . . . . . . . . 13 (𝑦𝐵𝑆) = {⟨𝑦, 𝑢⟩ ∣ (𝑦𝐵𝑢 = 𝑆)}
5452, 53brabga 5516 . . . . . . . . . . . 12 ((𝑅𝐵𝑤 ∈ V) → (𝑅(𝑦𝐵𝑆)𝑤 ↔ (𝑅𝐵𝑤 = 𝑇)))
554, 46, 54sylancl 598 . . . . . . . . . . 11 ((𝜑𝑥𝐴) → (𝑅(𝑦𝐵𝑆)𝑤 ↔ (𝑅𝐵𝑤 = 𝑇)))
56 id 23 . . . . . . . . . . . . 13 (𝑥𝐴𝑥𝐴)
57 eqid 2762 . . . . . . . . . . . . . 14 (𝑥𝐴𝑅) = (𝑥𝐴𝑅)
5857fvmpt2 7002 . . . . . . . . . . . . 13 ((𝑥𝐴𝑅𝐵) → ((𝑥𝐴𝑅)‘𝑥) = 𝑅)
5956, 4, 58syl2an2 699 . . . . . . . . . . . 12 ((𝜑𝑥𝐴) → ((𝑥𝐴𝑅)‘𝑥) = 𝑅)
6059breq1d 5117 . . . . . . . . . . 11 ((𝜑𝑥𝐴) → (((𝑥𝐴𝑅)‘𝑥)(𝑦𝐵𝑆)𝑤𝑅(𝑦𝐵𝑆)𝑤))
614biantrurd 542 . . . . . . . . . . 11 ((𝜑𝑥𝐴) → (𝑤 = 𝑇 ↔ (𝑅𝐵𝑤 = 𝑇)))
6255, 60, 613bitr4d 314 . . . . . . . . . 10 ((𝜑𝑥𝐴) → (((𝑥𝐴𝑅)‘𝑥)(𝑦𝐵𝑆)𝑤𝑤 = 𝑇))
6362expcom 419 . . . . . . . . 9 (𝑥𝐴 → (𝜑 → (((𝑥𝐴𝑅)‘𝑥)(𝑦𝐵𝑆)𝑤𝑤 = 𝑇)))
6430, 39, 45, 63vtoclgaf 3538 . . . . . . . 8 (𝑧𝐴 → (𝜑 → (((𝑥𝐴𝑅)‘𝑧)(𝑦𝐵𝑆)𝑤𝑤 = 𝑧 / 𝑥𝑇)))
6564impcom 413 . . . . . . 7 ((𝜑𝑧𝐴) → (((𝑥𝐴𝑅)‘𝑧)(𝑦𝐵𝑆)𝑤𝑤 = 𝑧 / 𝑥𝑇))
6665pm5.32da 590 . . . . . 6 (𝜑 → ((𝑧𝐴 ∧ ((𝑥𝐴𝑅)‘𝑧)(𝑦𝐵𝑆)𝑤) ↔ (𝑧𝐴𝑤 = 𝑧 / 𝑥𝑇)))
6729, 66bitrd 282 . . . . 5 (𝜑 → ((𝑧𝐹(𝐹𝑧) ∧ (𝐹𝑧)𝐺𝑤) ↔ (𝑧𝐴𝑤 = 𝑧 / 𝑥𝑇)))
6819, 67bitrid 286 . . . 4 (𝜑 → (∃𝑢(𝑢 = (𝐹𝑧) ∧ (𝑧𝐹𝑢𝑢𝐺𝑤)) ↔ (𝑧𝐴𝑤 = 𝑧 / 𝑥𝑇)))
6914, 68bitrd 282 . . 3 (𝜑 → (∃𝑢(𝑧𝐹𝑢𝑢𝐺𝑤) ↔ (𝑧𝐴𝑤 = 𝑧 / 𝑥𝑇)))
70 vex 3457 . . . 4 𝑧 ∈ V
7170, 46opelco 5855 . . 3 (⟨𝑧, 𝑤⟩ ∈ (𝐺𝐹) ↔ ∃𝑢(𝑧𝐹𝑢𝑢𝐺𝑤))
72 df-mpt 5191 . . . . 5 (𝑥𝐴𝑇) = {⟨𝑥, 𝑣⟩ ∣ (𝑥𝐴𝑣 = 𝑇)}
7372eleq2i 2854 . . . 4 (⟨𝑧, 𝑤⟩ ∈ (𝑥𝐴𝑇) ↔ ⟨𝑧, 𝑤⟩ ∈ {⟨𝑥, 𝑣⟩ ∣ (𝑥𝐴𝑣 = 𝑇)})
74 nfv 1947 . . . . . 6 𝑥 𝑧𝐴
7536nfeq2 2941 . . . . . 6 𝑥 𝑣 = 𝑧 / 𝑥𝑇
7674, 75nfan 1932 . . . . 5 𝑥(𝑧𝐴𝑣 = 𝑧 / 𝑥𝑇)
77 nfv 1947 . . . . 5 𝑣(𝑧𝐴𝑤 = 𝑧 / 𝑥𝑇)
78 eleq1w 2845 . . . . . 6 (𝑥 = 𝑧 → (𝑥𝐴𝑧𝐴))
7942eqeq2d 2773 . . . . . 6 (𝑥 = 𝑧 → (𝑣 = 𝑇𝑣 = 𝑧 / 𝑥𝑇))
8078, 79anbi12d 644 . . . . 5 (𝑥 = 𝑧 → ((𝑥𝐴𝑣 = 𝑇) ↔ (𝑧𝐴𝑣 = 𝑧 / 𝑥𝑇)))
81 eqeq1 2766 . . . . . 6 (𝑣 = 𝑤 → (𝑣 = 𝑧 / 𝑥𝑇𝑤 = 𝑧 / 𝑥𝑇))
8281anbi2d 642 . . . . 5 (𝑣 = 𝑤 → ((𝑧𝐴𝑣 = 𝑧 / 𝑥𝑇) ↔ (𝑧𝐴𝑤 = 𝑧 / 𝑥𝑇)))
8376, 77, 70, 46, 80, 82opelopabf 5528 . . . 4 (⟨𝑧, 𝑤⟩ ∈ {⟨𝑥, 𝑣⟩ ∣ (𝑥𝐴𝑣 = 𝑇)} ↔ (𝑧𝐴𝑤 = 𝑧 / 𝑥𝑇))
8473, 83bitri 278 . . 3 (⟨𝑧, 𝑤⟩ ∈ (𝑥𝐴𝑇) ↔ (𝑧𝐴𝑤 = 𝑧 / 𝑥𝑇))
8569, 71, 843bitr4g 317 . 2 (𝜑 → (⟨𝑧, 𝑤⟩ ∈ (𝐺𝐹) ↔ ⟨𝑧, 𝑤⟩ ∈ (𝑥𝐴𝑇)))
861, 2, 85eqrelrdv 5776 1 (𝜑 → (𝐺𝐹) = (𝑥𝐴𝑇))
Colors of variables:    wff setvar class
This proof depends on syntax axioms:  wi 4  wb 209  wa 401   = wceq 1570  wex 1812  wcel 2145  Vcvv 3453  csb 3850  cop 4593   class class class wbr 5107  {copab 5171  cmpt 5190  dom cdm 5659  ccom 5663  Fun wfun 6531  cfv 6537
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1828  ax-4 1842  ax-5 1943  ax-6 2000  ax-7 2041  ax-8 2147  ax-9 2155  ax-10 2178  ax-11 2194  ax-12 2215  ax-ext 2734  ax-sep 5255  ax-nul 5267  ax-pr 5402
This proof depends on definitions:  df-bi 210  df-an 402  df-or 862  df-3an 1105  df-tru 1573  df-fal 1583  df-ex 1813  df-nf 1817  df-sb 2100  df-mo 2566  df-eu 2596  df-clab 2741  df-cleq 2754  df-clel 2837  df-nfc 2911  df-ne 2958  df-ral 3079  df-rex 3089  df-rab 3415  df-v 3455  df-sbc 3743  df-csb 3851  df-dif 3905  df-un 3907  df-in 3909  df-ss 3919  df-nul 4283  df-if 4486  df-sn 4588  df-pr 4590  df-op 4594  df-uni 4871  df-br 5108  df-opab 5172  df-mpt 5191  df-id 5554  df-xp 5665  df-rel 5666  df-cnv 5667  df-co 5668  df-dm 5669  df-rn 5670  df-res 5671  df-ima 5672  df-iota 6493  df-fun 6539  df-fn 6540  df-f 6541  df-fv 6545
This theorem is used by:  fmptcof  7127  cofmpt  7129  fcompt  7130  fcoconst  7131  ofco  7706  ccatco  14908  rlimcn1  15677  rlimdiv  15735  ackbijnn  15919  setcepi  18181  prf1st  18296  prf2nd  18297  hofcllem  18350  prdsidlem  18878  pws0g  18882  mhmvlin  18910  pwsco1mhm  18942  pwsco2mhm  18943  smndex1iidm  19011  smndex2dlinvh  19030  pwsinvg  19177  pwssub  19178  ghmquskerco  19412  galactghm  19532  efginvrel1  19856  frgpup3lem  19905  gsumzf1o  20040  gsumconst  20062  gsummptshft  20064  gsumzmhm  20065  gsummhm2  20067  gsummptmhm  20068  gsumsub  20076  gsum2dlem2  20099  dprdfsub  20151  lmhmvsca  21230  frgpcyg  21787  evpmodpmf1o  21810  psrass1lem  22149  psrlinv  22171  psrcom  22183  evlslem2  22296  selvvvval  22359  psdmplcl  22391  psdmul  22395  coe1fval3  22434  psropprmul  22463  coe1z  22490  coe1mul2  22496  coe1tm  22500  ply1coe  22524  evls1sca  22549  ofco2  22674  mdetleib2  22811  mdetralt  22831  smadiadetlem3  22891  ptrescn  23866  lmcn2  23876  qtopeu  23943  flfcnp2  24234  tgpconncomp  24340  tsmssub  24376  tsmsxplem1  24380  negfcncf  25152  pcopt  25251  pcopt2  25252  pi1xfrcnvlem  25285  ovolctb  25719  ovolfs2  25800  uniioombllem2  25812  ismbf  25857  mbfconst  25862  limccnp2  26121  limcco  26122  dvcof  26177  dvcj  26179  dvfre  26180  dvmptcj  26197  dvmptco  26201  dvcnvlem  26205  dvlip  26222  dvlipcn  26223  itgsubstlem  26277  plyco  26468  dgrcolem1  26500  dgrcolem2  26501  dgrco  26502  plycjlem  26503  taylply2  26601  logcn  26882  leibpi  27177  efrlim  27204  jensenlem2  27222  amgmlem  27224  ftalem7  27313  dchrisum0  27754  gsumwrd2dccat  33505  mplvrpmfgalem  34041  psrmonprod  34049  esplyfval0  34061  esplyfvaln  34071  ofcfval4  34602  eulerpartgbij  34870  dstfrvclim1  34976  cvmliftlem6  35856  cvmliftphtlem  35883  cvmlift3lem5  35889  elmsubrn  36094  msubco  36097  circum  36240  mblfinlem2  38394  volsupnfl  38401  itgaddnc  38416  itgmulc2nc  38424  ftc1anclem1  38429  ftc1anclem2  38430  ftc1anclem3  38431  ftc1anclem4  38432  ftc1anclem5  38433  ftc1anclem7  38435  ftc1anclem8  38436  fnopabco  38460  upixp  38466  aks6d1c6lem4  43026  evlselv  43422  mendassa  44018  fsovrfovd  44836  fsovcnvlem  44840  cncfcompt  46698  dvcosax  46741  dirkercncflem4  46921  fourierdlem111  47032  meadjiunlem  47280  meadjiun  47281  fundcmpsurbijinjpreimafv  48294  itcovalpclem2  49588  itcovalt2lem2  49593  amgmwlem  50807  amgmlemALT  50808
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