Theorem imaeq2 5117

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 5053	. . 3 ⊢ (𝐴 = 𝐵 → (𝐶 ↾ 𝐴) = (𝐶 ↾ 𝐵))
2	1	rneqd 5006	. 2 ⊢ (𝐴 = 𝐵 → ran (𝐶 ↾ 𝐴) = ran (𝐶 ↾ 𝐵))
3		df-ima 4782	. 2 ⊢ (𝐶 “ 𝐴) = ran (𝐶 ↾ 𝐴)
4		df-ima 4782	. 2 ⊢ (𝐶 “ 𝐵) = ran (𝐶 ↾ 𝐵)
5	2, 3, 4	3eqtr4g 2296	1 ⊢ (𝐴 = 𝐵 → (𝐶 “ 𝐴) = (𝐶 “ 𝐵))

Syntax hints:   → wi 4   = wceq 1402  ran crn 4770   ↾ cres 4771   “ cima 4772

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 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-ext 2220

This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-sn 3711  df-pr 3712  df-op 3714  df-br 4126  df-opab 4188  df-xp 4775  df-cnv 4777  df-dm 4779  df-rn 4780  df-res 4781  df-ima 4782

This theorem is referenced by:  imaeq2i  5119  imaeq2d  5121  fimadmfo  5619  ssimaex  5758  ssimaexg  5759  isoselem  6016  f1opw2  6286  supp0cosupp0fn  6497  fopwdom  7126  ssenen  7142  fiintim  7228  fidcenumlemrk  7261  fidcenumlemr  7262  sbthlem2  7265  isbth  7274  ennnfonelemp1  13275  ennnfonelemnn0  13291  ctinfomlemom  13296  ctinfom  13297  tgcn  15232  iscnp4  15242  cnpnei  15243  cnima  15244  cnconst2  15257  cnrest2  15260  cnptoprest  15263  txcnp  15295  txcnmpt  15297  metcnp3  15535