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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 4938 | . . 3 ⊢ (𝐴 = 𝐵 → (𝐶 ↾ 𝐴) = (𝐶 ↾ 𝐵)) | |
2 | 1 | rneqd 4892 | . 2 ⊢ (𝐴 = 𝐵 → ran (𝐶 ↾ 𝐴) = ran (𝐶 ↾ 𝐵)) |
3 | df-ima 4673 | . 2 ⊢ (𝐶 “ 𝐴) = ran (𝐶 ↾ 𝐴) | |
4 | df-ima 4673 | . 2 ⊢ (𝐶 “ 𝐵) = ran (𝐶 ↾ 𝐵) | |
5 | 2, 3, 4 | 3eqtr4g 2251 | 1 ⊢ (𝐴 = 𝐵 → (𝐶 “ 𝐴) = (𝐶 “ 𝐵)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1364 ran crn 4661 ↾ cres 4662 “ cima 4663 |
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 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-ext 2175 |
This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1472 df-sb 1774 df-clab 2180 df-cleq 2186 df-clel 2189 df-nfc 2325 df-v 2762 df-un 3158 df-in 3160 df-ss 3167 df-sn 3625 df-pr 3626 df-op 3628 df-br 4031 df-opab 4092 df-xp 4666 df-cnv 4668 df-dm 4670 df-rn 4671 df-res 4672 df-ima 4673 |
This theorem is referenced by: imaeq2i 5004 imaeq2d 5006 fimadmfo 5486 ssimaex 5619 ssimaexg 5620 isoselem 5864 f1opw2 6126 fopwdom 6894 ssenen 6909 fiintim 6987 fidcenumlemrk 7015 fidcenumlemr 7016 sbthlem2 7019 isbth 7028 ennnfonelemp1 12566 ennnfonelemnn0 12582 ctinfomlemom 12587 ctinfom 12588 tgcn 14387 iscnp4 14397 cnpnei 14398 cnima 14399 cnconst2 14412 cnrest2 14415 cnptoprest 14418 txcnp 14450 txcnmpt 14452 metcnp3 14690 |
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