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Mirrors > Home > MPE Home > Th. List > feq1 | Structured version Visualization version GIF version |
Description: Equality theorem for functions. (Contributed by NM, 1-Aug-1994.) |
Ref | Expression |
---|---|
feq1 | ⊢ (𝐹 = 𝐺 → (𝐹:𝐴⟶𝐵 ↔ 𝐺:𝐴⟶𝐵)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | fneq1 5979 | . . 3 ⊢ (𝐹 = 𝐺 → (𝐹 Fn 𝐴 ↔ 𝐺 Fn 𝐴)) | |
2 | rneq 5351 | . . . 4 ⊢ (𝐹 = 𝐺 → ran 𝐹 = ran 𝐺) | |
3 | 2 | sseq1d 3632 | . . 3 ⊢ (𝐹 = 𝐺 → (ran 𝐹 ⊆ 𝐵 ↔ ran 𝐺 ⊆ 𝐵)) |
4 | 1, 3 | anbi12d 747 | . 2 ⊢ (𝐹 = 𝐺 → ((𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵) ↔ (𝐺 Fn 𝐴 ∧ ran 𝐺 ⊆ 𝐵))) |
5 | df-f 5892 | . 2 ⊢ (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) | |
6 | df-f 5892 | . 2 ⊢ (𝐺:𝐴⟶𝐵 ↔ (𝐺 Fn 𝐴 ∧ ran 𝐺 ⊆ 𝐵)) | |
7 | 4, 5, 6 | 3bitr4g 303 | 1 ⊢ (𝐹 = 𝐺 → (𝐹:𝐴⟶𝐵 ↔ 𝐺:𝐴⟶𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 196 ∧ wa 384 = wceq 1483 ⊆ wss 3574 ran crn 5115 Fn wfn 5883 ⟶wf 5884 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1722 ax-4 1737 ax-5 1839 ax-6 1888 ax-7 1935 ax-9 1999 ax-10 2019 ax-11 2034 ax-12 2047 ax-13 2246 ax-ext 2602 |
This theorem depends on definitions: df-bi 197 df-or 385 df-an 386 df-3an 1039 df-tru 1486 df-ex 1705 df-nf 1710 df-sb 1881 df-clab 2609 df-cleq 2615 df-clel 2618 df-nfc 2753 df-rab 2921 df-v 3202 df-dif 3577 df-un 3579 df-in 3581 df-ss 3588 df-nul 3916 df-if 4087 df-sn 4178 df-pr 4180 df-op 4184 df-br 4654 df-opab 4713 df-rel 5121 df-cnv 5122 df-co 5123 df-dm 5124 df-rn 5125 df-fun 5890 df-fn 5891 df-f 5892 |
This theorem is referenced by: feq1d 6030 feq1i 6036 elimf 6044 f00 6087 f0bi 6088 f0dom0 6089 fconstg 6092 f1eq1 6096 fconst2g 6468 fsnex 6538 elmapg 7870 ac6sfi 8204 ac5num 8859 acni2 8869 cofsmo 9091 cfsmolem 9092 cfcoflem 9094 coftr 9095 alephsing 9098 axdc2lem 9270 axdc3lem2 9273 axdc3lem3 9274 axdc3 9276 axdc4lem 9277 ac6num 9301 inar1 9597 axdc4uzlem 12782 seqf1olem2 12841 seqf1o 12842 iswrd 13307 cshf1 13556 wrdlen2i 13686 ramub2 15718 ramcl 15733 isacs2 16314 isacs1i 16318 mreacs 16319 mgmb1mgm1 17254 isgrpinv 17472 isghm 17660 islindf 20151 mat1dimelbas 20277 1stcfb 21248 upxp 21426 txcn 21429 isi1f 23441 mbfi1fseqlem6 23487 mbfi1flimlem 23489 itg2addlem 23525 plyf 23954 griedg0prc 26156 isgrpo 27351 vciOLD 27416 isvclem 27432 isnvlem 27465 ajmoi 27714 ajval 27717 hlimi 28045 chlimi 28091 chcompl 28099 adjmo 28691 adjeu 28748 adjval 28749 adj1 28792 adjeq 28794 cnlnssadj 28939 pjinvari 29050 padct 29497 locfinref 29908 isrnmeas 30263 fprb 31669 orderseqlem 31749 soseq 31751 elno 31799 filnetlem4 32376 bj-finsumval0 33147 poimirlem25 33434 poimirlem28 33437 volsupnfl 33454 mbfresfi 33456 upixp 33524 sdclem2 33538 sdclem1 33539 fdc 33541 ismgmOLD 33649 elghomlem2OLD 33685 istendo 36048 ismrc 37264 fmuldfeqlem1 39814 fmuldfeq 39815 dvnprodlem1 40161 stoweidlem15 40232 stoweidlem16 40233 stoweidlem17 40234 stoweidlem19 40236 stoweidlem20 40237 stoweidlem21 40238 stoweidlem22 40239 stoweidlem23 40240 stoweidlem27 40244 stoweidlem31 40248 stoweidlem32 40249 stoweidlem42 40259 stoweidlem48 40265 stoweidlem51 40268 stoweidlem59 40276 isomenndlem 40744 smfpimcclem 41013 lincdifsn 42213 |
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