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Theorem foimacnv 6116
Description: A reverse version of f1imacnv 6115. (Contributed by Jeff Hankins, 16-Jul-2009.)
Assertion
Ref Expression
foimacnv ((𝐹:𝐴onto𝐵𝐶𝐵) → (𝐹 “ (𝐹𝐶)) = 𝐶)

Proof of Theorem foimacnv
StepHypRef Expression
1 resima 5395 . 2 ((𝐹 ↾ (𝐹𝐶)) “ (𝐹𝐶)) = (𝐹 “ (𝐹𝐶))
2 fofun 6078 . . . . . 6 (𝐹:𝐴onto𝐵 → Fun 𝐹)
32adantr 481 . . . . 5 ((𝐹:𝐴onto𝐵𝐶𝐵) → Fun 𝐹)
4 funcnvres2 5932 . . . . 5 (Fun 𝐹(𝐹𝐶) = (𝐹 ↾ (𝐹𝐶)))
53, 4syl 17 . . . 4 ((𝐹:𝐴onto𝐵𝐶𝐵) → (𝐹𝐶) = (𝐹 ↾ (𝐹𝐶)))
65imaeq1d 5429 . . 3 ((𝐹:𝐴onto𝐵𝐶𝐵) → ((𝐹𝐶) “ (𝐹𝐶)) = ((𝐹 ↾ (𝐹𝐶)) “ (𝐹𝐶)))
7 resss 5386 . . . . . . . . . . 11 (𝐹𝐶) ⊆ 𝐹
8 cnvss 5259 . . . . . . . . . . 11 ((𝐹𝐶) ⊆ 𝐹(𝐹𝐶) ⊆ 𝐹)
97, 8ax-mp 5 . . . . . . . . . 10 (𝐹𝐶) ⊆ 𝐹
10 cnvcnvss 5553 . . . . . . . . . 10 𝐹𝐹
119, 10sstri 3596 . . . . . . . . 9 (𝐹𝐶) ⊆ 𝐹
12 funss 5871 . . . . . . . . 9 ((𝐹𝐶) ⊆ 𝐹 → (Fun 𝐹 → Fun (𝐹𝐶)))
1311, 2, 12mpsyl 68 . . . . . . . 8 (𝐹:𝐴onto𝐵 → Fun (𝐹𝐶))
1413adantr 481 . . . . . . 7 ((𝐹:𝐴onto𝐵𝐶𝐵) → Fun (𝐹𝐶))
15 df-ima 5092 . . . . . . . 8 (𝐹𝐶) = ran (𝐹𝐶)
16 df-rn 5090 . . . . . . . 8 ran (𝐹𝐶) = dom (𝐹𝐶)
1715, 16eqtr2i 2644 . . . . . . 7 dom (𝐹𝐶) = (𝐹𝐶)
1814, 17jctir 560 . . . . . 6 ((𝐹:𝐴onto𝐵𝐶𝐵) → (Fun (𝐹𝐶) ∧ dom (𝐹𝐶) = (𝐹𝐶)))
19 df-fn 5855 . . . . . 6 ((𝐹𝐶) Fn (𝐹𝐶) ↔ (Fun (𝐹𝐶) ∧ dom (𝐹𝐶) = (𝐹𝐶)))
2018, 19sylibr 224 . . . . 5 ((𝐹:𝐴onto𝐵𝐶𝐵) → (𝐹𝐶) Fn (𝐹𝐶))
21 dfdm4 5281 . . . . . 6 dom (𝐹𝐶) = ran (𝐹𝐶)
22 forn 6080 . . . . . . . . . 10 (𝐹:𝐴onto𝐵 → ran 𝐹 = 𝐵)
2322sseq2d 3617 . . . . . . . . 9 (𝐹:𝐴onto𝐵 → (𝐶 ⊆ ran 𝐹𝐶𝐵))
2423biimpar 502 . . . . . . . 8 ((𝐹:𝐴onto𝐵𝐶𝐵) → 𝐶 ⊆ ran 𝐹)
25 df-rn 5090 . . . . . . . 8 ran 𝐹 = dom 𝐹
2624, 25syl6sseq 3635 . . . . . . 7 ((𝐹:𝐴onto𝐵𝐶𝐵) → 𝐶 ⊆ dom 𝐹)
27 ssdmres 5384 . . . . . . 7 (𝐶 ⊆ dom 𝐹 ↔ dom (𝐹𝐶) = 𝐶)
2826, 27sylib 208 . . . . . 6 ((𝐹:𝐴onto𝐵𝐶𝐵) → dom (𝐹𝐶) = 𝐶)
2921, 28syl5eqr 2669 . . . . 5 ((𝐹:𝐴onto𝐵𝐶𝐵) → ran (𝐹𝐶) = 𝐶)
30 df-fo 5858 . . . . 5 ((𝐹𝐶):(𝐹𝐶)–onto𝐶 ↔ ((𝐹𝐶) Fn (𝐹𝐶) ∧ ran (𝐹𝐶) = 𝐶))
3120, 29, 30sylanbrc 697 . . . 4 ((𝐹:𝐴onto𝐵𝐶𝐵) → (𝐹𝐶):(𝐹𝐶)–onto𝐶)
32 foima 6082 . . . 4 ((𝐹𝐶):(𝐹𝐶)–onto𝐶 → ((𝐹𝐶) “ (𝐹𝐶)) = 𝐶)
3331, 32syl 17 . . 3 ((𝐹:𝐴onto𝐵𝐶𝐵) → ((𝐹𝐶) “ (𝐹𝐶)) = 𝐶)
346, 33eqtr3d 2657 . 2 ((𝐹:𝐴onto𝐵𝐶𝐵) → ((𝐹 ↾ (𝐹𝐶)) “ (𝐹𝐶)) = 𝐶)
351, 34syl5eqr 2669 1 ((𝐹:𝐴onto𝐵𝐶𝐵) → (𝐹 “ (𝐹𝐶)) = 𝐶)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 384   = wceq 1480  wss 3559  ccnv 5078  dom cdm 5079  ran crn 5080  cres 5081  cima 5082  Fun wfun 5846   Fn wfn 5847  ontowfo 5850
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1836  ax-6 1885  ax-7 1932  ax-9 1996  ax-10 2016  ax-11 2031  ax-12 2044  ax-13 2245  ax-ext 2601  ax-sep 4746  ax-nul 4754  ax-pr 4872
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1038  df-tru 1483  df-ex 1702  df-nf 1707  df-sb 1878  df-eu 2473  df-mo 2474  df-clab 2608  df-cleq 2614  df-clel 2617  df-nfc 2750  df-ral 2912  df-rex 2913  df-rab 2916  df-v 3191  df-dif 3562  df-un 3564  df-in 3566  df-ss 3573  df-nul 3897  df-if 4064  df-sn 4154  df-pr 4156  df-op 4160  df-br 4619  df-opab 4679  df-id 4994  df-xp 5085  df-rel 5086  df-cnv 5087  df-co 5088  df-dm 5089  df-rn 5090  df-res 5091  df-ima 5092  df-fun 5854  df-fn 5855  df-f 5856  df-fo 5858
This theorem is referenced by:  f1opw2  6848  imacosupp  7287  fopwdom  8019  f1opwfi  8221  enfin2i  9094  fin1a2lem7  9179  fsumss  14396  fprodss  14610  gicsubgen  17649  coe1mul2lem2  19566  cncmp  21114  cnconn  21144  qtoprest  21439  qtopomap  21440  qtopcmap  21441  hmeoimaf1o  21492  elfm3  21673  imasf1oxms  22213  mbfimaopnlem  23341  cvmsss2  30991  diaintclN  35854  dibintclN  35963  dihintcl  36140  lnmepi  37162  pwfi2f1o  37173  sge0f1o  39927
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