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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 6414 | . . 3 ⊢ (𝐹 = 𝐺 → (𝐹 Fn 𝐴 ↔ 𝐺 Fn 𝐴)) | |
2 | rneq 5770 | . . . 4 ⊢ (𝐹 = 𝐺 → ran 𝐹 = ran 𝐺) | |
3 | 2 | sseq1d 3946 | . . 3 ⊢ (𝐹 = 𝐺 → (ran 𝐹 ⊆ 𝐵 ↔ ran 𝐺 ⊆ 𝐵)) |
4 | 1, 3 | anbi12d 633 | . 2 ⊢ (𝐹 = 𝐺 → ((𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵) ↔ (𝐺 Fn 𝐴 ∧ ran 𝐺 ⊆ 𝐵))) |
5 | df-f 6328 | . 2 ⊢ (𝐹:𝐴⟶𝐵 ↔ (𝐹 Fn 𝐴 ∧ ran 𝐹 ⊆ 𝐵)) | |
6 | df-f 6328 | . 2 ⊢ (𝐺:𝐴⟶𝐵 ↔ (𝐺 Fn 𝐴 ∧ ran 𝐺 ⊆ 𝐵)) | |
7 | 4, 5, 6 | 3bitr4g 317 | 1 ⊢ (𝐹 = 𝐺 → (𝐹:𝐴⟶𝐵 ↔ 𝐺:𝐴⟶𝐵)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 209 ∧ wa 399 = wceq 1538 ⊆ wss 3881 ran crn 5520 Fn wfn 6319 ⟶wf 6320 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-v 3443 df-un 3886 df-in 3888 df-ss 3898 df-sn 4526 df-pr 4528 df-op 4532 df-br 5031 df-opab 5093 df-rel 5526 df-cnv 5527 df-co 5528 df-dm 5529 df-rn 5530 df-fun 6326 df-fn 6327 df-f 6328 |
This theorem is referenced by: feq1d 6472 feq1i 6478 elimf 6486 f00 6535 f0bi 6536 f0dom0 6537 fconstg 6540 f1eq1 6544 fprb 6933 fconst2g 6942 fsnex 7017 elmapg 8402 ac6sfi 8746 updjud 9347 ac5num 9447 acni2 9457 cofsmo 9680 cfsmolem 9681 cfcoflem 9683 coftr 9684 alephsing 9687 axdc2lem 9859 axdc3lem2 9862 axdc3lem3 9863 axdc3 9865 axdc4lem 9866 ac6num 9890 inar1 10186 axdc4uzlem 13346 seqf1olem2 13406 seqf1o 13407 iswrd 13859 cshf1 14163 wrdlen2i 14295 ramub2 16340 ramcl 16355 isacs2 16916 isacs1i 16920 mreacs 16921 mgmb1mgm1 17857 elefmndbas2 18031 isgrpinv 18148 isghm 18350 islindf 20501 mat1dimelbas 21076 1stcfb 22050 upxp 22228 txcn 22231 isi1f 24278 mbfi1fseqlem6 24324 mbfi1flimlem 24326 itg2addlem 24362 plyf 24795 griedg0prc 27054 isgrpo 28280 vciOLD 28344 isvclem 28360 isnvlem 28393 ajmoi 28641 ajval 28644 hlimi 28971 chlimi 29017 chcompl 29025 adjmo 29615 adjeu 29672 adjval 29673 adj1 29716 adjeq 29718 cnlnssadj 29863 pjinvari 29974 padct 30481 locfinref 31194 isrnmeas 31569 orderseqlem 33207 soseq 33209 elno 33266 filnetlem4 33842 bj-finsumval0 34700 poimirlem25 35082 poimirlem28 35085 volsupnfl 35102 mbfresfi 35103 upixp 35167 sdclem2 35180 sdclem1 35181 fdc 35183 ismgmOLD 35288 elghomlem2OLD 35324 istendo 38056 ismrc 39642 fmuldfeqlem1 42224 fmuldfeq 42225 dvnprodlem1 42588 stoweidlem15 42657 stoweidlem16 42658 stoweidlem17 42659 stoweidlem19 42661 stoweidlem20 42662 stoweidlem21 42663 stoweidlem22 42664 stoweidlem23 42665 stoweidlem27 42669 stoweidlem31 42673 stoweidlem32 42674 stoweidlem42 42684 stoweidlem48 42690 stoweidlem51 42693 stoweidlem59 42701 isomenndlem 43169 smfpimcclem 43438 lincdifsn 44833 0aryfvalel 45048 |
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