Theorem imaeq2 5078

Description: Equality theorem for image. (Contributed by NM, 14-Aug-1994.)

Assertion

Ref	Expression
imaeq2	⊢ (𝐴 = 𝐵 → (𝐶 “ 𝐴) = (𝐶 “ 𝐵))

Proof of Theorem imaeq2

Step	Hyp	Ref	Expression
1		reseq2 5014	. . 3 ⊢ (𝐴 = 𝐵 → (𝐶 ↾ 𝐴) = (𝐶 ↾ 𝐵))
2	1	rneqd 4967	. 2 ⊢ (𝐴 = 𝐵 → ran (𝐶 ↾ 𝐴) = ran (𝐶 ↾ 𝐵))
3		df-ima 4744	. 2 ⊢ (𝐶 “ 𝐴) = ran (𝐶 ↾ 𝐴)
4		df-ima 4744	. 2 ⊢ (𝐶 “ 𝐵) = ran (𝐶 ↾ 𝐵)
5	2, 3, 4	3eqtr4g 2289	1 ⊢ (𝐴 = 𝐵 → (𝐶 “ 𝐴) = (𝐶 “ 𝐵))

Syntax hints:   → wi 4   = wceq 1398  ran crn 4732   ↾ cres 4733   “ cima 4734

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2213

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-v 2805  df-un 3205  df-in 3207  df-ss 3214  df-sn 3679  df-pr 3680  df-op 3682  df-br 4094  df-opab 4156  df-xp 4737  df-cnv 4739  df-dm 4741  df-rn 4742  df-res 4743  df-ima 4744

This theorem is referenced by:  imaeq2i  5080  imaeq2d  5082  fimadmfo  5577  ssimaex  5716  ssimaexg  5717  isoselem  5971  f1opw2  6239  supp0cosupp0fn  6445  fopwdom  7065  ssenen  7080  fiintim  7166  fidcenumlemrk  7196  fidcenumlemr  7197  sbthlem2  7200  isbth  7209  ennnfonelemp1  13090  ennnfonelemnn0  13106  ctinfomlemom  13111  ctinfom  13112  tgcn  15002  iscnp4  15012  cnpnei  15013  cnima  15014  cnconst2  15027  cnrest2  15030  cnptoprest  15033  txcnp  15065  txcnmpt  15067  metcnp3  15305