Theorem imaundi 6181

Description: Distributive law for image over union. Theorem 35 of [Suppes] p. 65. (Contributed by NM, 30-Sep-2002.)

Assertion

Ref	Expression
imaundi	⊢ (𝐴 “ (𝐵 ∪ 𝐶)) = ((𝐴 “ 𝐵) ∪ (𝐴 “ 𝐶))

Proof of Theorem imaundi

Step	Hyp	Ref	Expression
1		resundi 6023	. . . 4 ⊢ (𝐴 ↾ (𝐵 ∪ 𝐶)) = ((𝐴 ↾ 𝐵) ∪ (𝐴 ↾ 𝐶))
2	1	rneqi 5962	. . 3 ⊢ ran (𝐴 ↾ (𝐵 ∪ 𝐶)) = ran ((𝐴 ↾ 𝐵) ∪ (𝐴 ↾ 𝐶))
3		rnun 6177	. . 3 ⊢ ran ((𝐴 ↾ 𝐵) ∪ (𝐴 ↾ 𝐶)) = (ran (𝐴 ↾ 𝐵) ∪ ran (𝐴 ↾ 𝐶))
4	2, 3	eqtri 2768	. 2 ⊢ ran (𝐴 ↾ (𝐵 ∪ 𝐶)) = (ran (𝐴 ↾ 𝐵) ∪ ran (𝐴 ↾ 𝐶))
5		df-ima 5713	. 2 ⊢ (𝐴 “ (𝐵 ∪ 𝐶)) = ran (𝐴 ↾ (𝐵 ∪ 𝐶))
6		df-ima 5713	. . 3 ⊢ (𝐴 “ 𝐵) = ran (𝐴 ↾ 𝐵)
7		df-ima 5713	. . 3 ⊢ (𝐴 “ 𝐶) = ran (𝐴 ↾ 𝐶)
8	6, 7	uneq12i 4189	. 2 ⊢ ((𝐴 “ 𝐵) ∪ (𝐴 “ 𝐶)) = (ran (𝐴 ↾ 𝐵) ∪ ran (𝐴 ↾ 𝐶))
9	4, 5, 8	3eqtr4i 2778	1 ⊢ (𝐴 “ (𝐵 ∪ 𝐶)) = ((𝐴 “ 𝐵) ∪ (𝐴 “ 𝐶))

Syntax hints:   = wceq 1537   ∪ cun 3974  ran crn 5701   ↾ cres 5702   “ cima 5703

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1793  ax-4 1807  ax-5 1909  ax-6 1967  ax-7 2007  ax-8 2110  ax-9 2118  ax-10 2141  ax-12 2178  ax-ext 2711

This theorem depends on definitions:  df-bi 207  df-an 396  df-or 847  df-3an 1089  df-tru 1540  df-fal 1550  df-ex 1778  df-nf 1782  df-sb 2065  df-clab 2718  df-cleq 2732  df-clel 2819  df-rab 3444  df-v 3490  df-dif 3979  df-un 3981  df-in 3983  df-ss 3993  df-nul 4353  df-if 4549  df-sn 4649  df-pr 4651  df-op 4655  df-br 5167  df-opab 5229  df-xp 5706  df-cnv 5708  df-dm 5710  df-rn 5711  df-res 5712  df-ima 5713

This theorem is referenced by:  cnvimassrndm  6183  fnimapr  7005  fnimatpd  7006  naddasslem1  8750  naddasslem2  8751  fodomfi  9378  imafiOLD  9382  domunfican  9389  fiint  9394  fiintOLD  9395  fodomfiOLD  9398  marypha1lem  9502  resunimafz0  14494  dprd2da  20086  dmdprdsplit2lem  20089  uniioombllem3  25639  mbfimaicc  25685  plyeq0  26270  madeoldsuc  27941  addsbday  28068  negsbdaylem  28106  pw2bday  28436  zs12bday  28442  ffsrn  32743  tocyccntz  33137  imadifss  37555  poimirlem1  37581  poimirlem2  37582  poimirlem3  37583  poimirlem4  37584  poimirlem6  37586  poimirlem7  37587  poimirlem11  37591  poimirlem12  37592  poimirlem15  37595  poimirlem16  37596  poimirlem17  37597  poimirlem19  37599  poimirlem20  37600  poimirlem23  37603  poimirlem24  37604  poimirlem25  37605  poimirlem29  37609  poimirlem31  37611  mbfposadd  37627  itg2addnclem2  37632  ftc1anclem1  37653  ftc1anclem5  37657  brtrclfv2  43689  frege77d  43708  frege109d  43719  frege131d  43726  dffrege76  43901  icccncfext  45808