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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 5000 | . . 3 ⊢ (𝐴 = 𝐵 → (𝐶 ↾ 𝐴) = (𝐶 ↾ 𝐵)) | |
| 2 | 1 | rneqd 4953 | . 2 ⊢ (𝐴 = 𝐵 → ran (𝐶 ↾ 𝐴) = ran (𝐶 ↾ 𝐵)) |
| 3 | df-ima 4732 | . 2 ⊢ (𝐶 “ 𝐴) = ran (𝐶 ↾ 𝐴) | |
| 4 | df-ima 4732 | . 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 4720 ↾ cres 4721 “ cima 4722 |
| 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 2801 df-un 3201 df-in 3203 df-ss 3210 df-sn 3672 df-pr 3673 df-op 3675 df-br 4084 df-opab 4146 df-xp 4725 df-cnv 4727 df-dm 4729 df-rn 4730 df-res 4731 df-ima 4732 |
| This theorem is referenced by: imaeq2i 5066 imaeq2d 5068 fimadmfo 5559 ssimaex 5697 ssimaexg 5698 isoselem 5950 f1opw2 6218 fopwdom 7005 ssenen 7020 fiintim 7104 fidcenumlemrk 7132 fidcenumlemr 7133 sbthlem2 7136 isbth 7145 ennnfonelemp1 12992 ennnfonelemnn0 13008 ctinfomlemom 13013 ctinfom 13014 tgcn 14897 iscnp4 14907 cnpnei 14908 cnima 14909 cnconst2 14922 cnrest2 14925 cnptoprest 14928 txcnp 14960 txcnmpt 14962 metcnp3 15200 |
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