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| Mirrors > Home > ILE Home > Th. List > imaeq2 | GIF version | ||
| Description: Equality theorem for image. (Contributed by NM, 14-Aug-1994.) |
| Ref | Expression |
|---|---|
| imaeq2 | ⊢ (𝐴 = 𝐵 → (𝐶 “ 𝐴) = (𝐶 “ 𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | reseq2 5060 | . . 3 ⊢ (𝐴 = 𝐵 → (𝐶 ↾ 𝐴) = (𝐶 ↾ 𝐵)) | |
| 2 | 1 | rneqd 5013 | . 2 ⊢ (𝐴 = 𝐵 → ran (𝐶 ↾ 𝐴) = ran (𝐶 ↾ 𝐵)) |
| 3 | df-ima 4789 | . 2 ⊢ (𝐶 “ 𝐴) = ran (𝐶 ↾ 𝐴) | |
| 4 | df-ima 4789 | . 2 ⊢ (𝐶 “ 𝐵) = ran (𝐶 ↾ 𝐵) | |
| 5 | 2, 3, 4 | 3eqtr4g 2296 | 1 ⊢ (𝐴 = 𝐵 → (𝐶 “ 𝐴) = (𝐶 “ 𝐵)) |
| Colors of variables: wff set class |
| This proof depends on syntax axioms: → wi 4 = wceq 1402 ran crn 4777 ↾ cres 4778 “ cima 4779 |
| This proof depends on 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 proof 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 3715 df-pr 3716 df-op 3718 df-br 4132 df-opab 4194 df-xp 4782 df-cnv 4784 df-dm 4786 df-rn 4787 df-res 4788 df-ima 4789 |
| This theorem is used by: imaeq2i 5127 imaeq2d 5129 fimadmfo 5627 ssimaex 5767 ssimaexg 5768 isoselem 6029 f1opw2 6299 supp0cosupp0fn 6511 fopwdom 7142 ssenen 7158 fiintim 7244 fidcenumlemrk 7278 fidcenumlemr 7279 sbthlem2 7282 isbth 7291 ennnfonelemp1 13354 ennnfonelemnn0 13370 ctinfomlemom 13375 ctinfom 13376 tgcn 15451 iscnp4 15461 cnpnei 15462 cnima 15463 cnconst2 15476 cnrest2 15479 cnptoprest 15482 txcnp 15514 txcnmpt 15516 metcnp3 15754 |
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