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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 5006 | . . 3 ⊢ (𝐴 = 𝐵 → (𝐶 ↾ 𝐴) = (𝐶 ↾ 𝐵)) | |
| 2 | 1 | rneqd 4959 | . 2 ⊢ (𝐴 = 𝐵 → ran (𝐶 ↾ 𝐴) = ran (𝐶 ↾ 𝐵)) |
| 3 | df-ima 4736 | . 2 ⊢ (𝐶 “ 𝐴) = ran (𝐶 ↾ 𝐴) | |
| 4 | df-ima 4736 | . 2 ⊢ (𝐶 “ 𝐵) = ran (𝐶 ↾ 𝐵) | |
| 5 | 2, 3, 4 | 3eqtr4g 2287 | 1 ⊢ (𝐴 = 𝐵 → (𝐶 “ 𝐴) = (𝐶 “ 𝐵)) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 = wceq 1395 ran crn 4724 ↾ cres 4725 “ cima 4726 |
| 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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-v 2802 df-un 3202 df-in 3204 df-ss 3211 df-sn 3673 df-pr 3674 df-op 3676 df-br 4087 df-opab 4149 df-xp 4729 df-cnv 4731 df-dm 4733 df-rn 4734 df-res 4735 df-ima 4736 |
| This theorem is referenced by: imaeq2i 5072 imaeq2d 5074 fimadmfo 5565 ssimaex 5703 ssimaexg 5704 isoselem 5956 f1opw2 6224 fopwdom 7017 ssenen 7032 fiintim 7116 fidcenumlemrk 7144 fidcenumlemr 7145 sbthlem2 7148 isbth 7157 ennnfonelemp1 13017 ennnfonelemnn0 13033 ctinfomlemom 13038 ctinfom 13039 tgcn 14922 iscnp4 14932 cnpnei 14933 cnima 14934 cnconst2 14947 cnrest2 14950 cnptoprest 14953 txcnp 14985 txcnmpt 14987 metcnp3 15225 |
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