MPE Home Metamath Proof Explorer < Previous   Next >
Nearby theorems
Mirrors  >  Home  >  MPE Home  >  Th. List  >  fcoOLD Structured version   Visualization version   GIF version

Theorem fcoOLD 6739
Description: Obsolete version of fco 6738 as of 20-Sep-2024. (Contributed by NM, 29-Aug-1999.) (Proof shortened by Andrew Salmon, 17-Sep-2011.) (New usage is discouraged.) (Proof modification is discouraged.)
Assertion
Ref Expression
fcoOLD ((𝐹:𝐵𝐶𝐺:𝐴𝐵) → (𝐹𝐺):𝐴𝐶)

Proof of Theorem fcoOLD
StepHypRef Expression
1 df-f 6544 . . 3 (𝐹:𝐵𝐶 ↔ (𝐹 Fn 𝐵 ∧ ran 𝐹𝐶))
2 df-f 6544 . . 3 (𝐺:𝐴𝐵 ↔ (𝐺 Fn 𝐴 ∧ ran 𝐺𝐵))
3 fnco 6664 . . . . . . 7 ((𝐹 Fn 𝐵𝐺 Fn 𝐴 ∧ ran 𝐺𝐵) → (𝐹𝐺) Fn 𝐴)
433expib 1122 . . . . . 6 (𝐹 Fn 𝐵 → ((𝐺 Fn 𝐴 ∧ ran 𝐺𝐵) → (𝐹𝐺) Fn 𝐴))
54adantr 481 . . . . 5 ((𝐹 Fn 𝐵 ∧ ran 𝐹𝐶) → ((𝐺 Fn 𝐴 ∧ ran 𝐺𝐵) → (𝐹𝐺) Fn 𝐴))
6 rncoss 5969 . . . . . . 7 ran (𝐹𝐺) ⊆ ran 𝐹
7 sstr 3989 . . . . . . 7 ((ran (𝐹𝐺) ⊆ ran 𝐹 ∧ ran 𝐹𝐶) → ran (𝐹𝐺) ⊆ 𝐶)
86, 7mpan 688 . . . . . 6 (ran 𝐹𝐶 → ran (𝐹𝐺) ⊆ 𝐶)
98adantl 482 . . . . 5 ((𝐹 Fn 𝐵 ∧ ran 𝐹𝐶) → ran (𝐹𝐺) ⊆ 𝐶)
105, 9jctird 527 . . . 4 ((𝐹 Fn 𝐵 ∧ ran 𝐹𝐶) → ((𝐺 Fn 𝐴 ∧ ran 𝐺𝐵) → ((𝐹𝐺) Fn 𝐴 ∧ ran (𝐹𝐺) ⊆ 𝐶)))
1110imp 407 . . 3 (((𝐹 Fn 𝐵 ∧ ran 𝐹𝐶) ∧ (𝐺 Fn 𝐴 ∧ ran 𝐺𝐵)) → ((𝐹𝐺) Fn 𝐴 ∧ ran (𝐹𝐺) ⊆ 𝐶))
121, 2, 11syl2anb 598 . 2 ((𝐹:𝐵𝐶𝐺:𝐴𝐵) → ((𝐹𝐺) Fn 𝐴 ∧ ran (𝐹𝐺) ⊆ 𝐶))
13 df-f 6544 . 2 ((𝐹𝐺):𝐴𝐶 ↔ ((𝐹𝐺) Fn 𝐴 ∧ ran (𝐹𝐺) ⊆ 𝐶))
1412, 13sylibr 233 1 ((𝐹:𝐵𝐶𝐺:𝐴𝐵) → (𝐹𝐺):𝐴𝐶)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wa 396  wss 3947  ran crn 5676  ccom 5679   Fn wfn 6535  wf 6536
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1913  ax-6 1971  ax-7 2011  ax-8 2108  ax-9 2116  ax-10 2137  ax-11 2154  ax-12 2171  ax-ext 2703  ax-sep 5298  ax-nul 5305  ax-pr 5426
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 846  df-3an 1089  df-tru 1544  df-fal 1554  df-ex 1782  df-nf 1786  df-sb 2068  df-mo 2534  df-eu 2563  df-clab 2710  df-cleq 2724  df-clel 2810  df-nfc 2885  df-ral 3062  df-rex 3071  df-rab 3433  df-v 3476  df-dif 3950  df-un 3952  df-in 3954  df-ss 3964  df-nul 4322  df-if 4528  df-sn 4628  df-pr 4630  df-op 4634  df-br 5148  df-opab 5210  df-id 5573  df-xp 5681  df-rel 5682  df-cnv 5683  df-co 5684  df-dm 5685  df-rn 5686  df-res 5687  df-ima 5688  df-fun 6542  df-fn 6543  df-f 6544
This theorem is referenced by: (None)
  Copyright terms: Public domain W3C validator