![]() |
Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
|
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 4899 | . . 3 ⊢ (𝐴 = 𝐵 → (𝐶 ↾ 𝐴) = (𝐶 ↾ 𝐵)) | |
2 | 1 | rneqd 4853 | . 2 ⊢ (𝐴 = 𝐵 → ran (𝐶 ↾ 𝐴) = ran (𝐶 ↾ 𝐵)) |
3 | df-ima 4637 | . 2 ⊢ (𝐶 “ 𝐴) = ran (𝐶 ↾ 𝐴) | |
4 | df-ima 4637 | . 2 ⊢ (𝐶 “ 𝐵) = ran (𝐶 ↾ 𝐵) | |
5 | 2, 3, 4 | 3eqtr4g 2235 | 1 ⊢ (𝐴 = 𝐵 → (𝐶 “ 𝐴) = (𝐶 “ 𝐵)) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1353 ran crn 4625 ↾ cres 4626 “ cima 4627 |
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 709 ax-5 1447 ax-7 1448 ax-gen 1449 ax-ie1 1493 ax-ie2 1494 ax-8 1504 ax-10 1505 ax-11 1506 ax-i12 1507 ax-bndl 1509 ax-4 1510 ax-17 1526 ax-i9 1530 ax-ial 1534 ax-i5r 1535 ax-ext 2159 |
This theorem depends on definitions: df-bi 117 df-3an 980 df-tru 1356 df-nf 1461 df-sb 1763 df-clab 2164 df-cleq 2170 df-clel 2173 df-nfc 2308 df-v 2739 df-un 3133 df-in 3135 df-ss 3142 df-sn 3598 df-pr 3599 df-op 3601 df-br 4002 df-opab 4063 df-xp 4630 df-cnv 4632 df-dm 4634 df-rn 4635 df-res 4636 df-ima 4637 |
This theorem is referenced by: imaeq2i 4965 imaeq2d 4967 ssimaex 5574 ssimaexg 5575 isoselem 5816 f1opw2 6072 fopwdom 6831 ssenen 6846 fiintim 6923 fidcenumlemrk 6948 fidcenumlemr 6949 sbthlem2 6952 isbth 6961 ennnfonelemp1 12397 ennnfonelemnn0 12413 ctinfomlemom 12418 ctinfom 12419 tgcn 13490 iscnp4 13500 cnpnei 13501 cnima 13502 cnconst2 13515 cnrest2 13518 cnptoprest 13521 txcnp 13553 txcnmpt 13555 metcnp3 13793 |
Copyright terms: Public domain | W3C validator |