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| Mirrors > Home > MPE Home > Th. List > f1eq1 | Structured version Visualization version GIF version | ||
| Description: Equality theorem for one-to-one functions. (Contributed by NM, 10-Feb-1997.) |
| Ref | Expression |
|---|---|
| f1eq1 | ⊢ (𝐹 = 𝐺 → (𝐹:𝐴–1-1→𝐵 ↔ 𝐺:𝐴–1-1→𝐵)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | feq1 6685 | . . 3 ⊢ (𝐹 = 𝐺 → (𝐹:𝐴⟶𝐵 ↔ 𝐺:𝐴⟶𝐵)) | |
| 2 | cnveq 5851 | . . . 4 ⊢ (𝐹 = 𝐺 → ◡𝐹 = ◡𝐺) | |
| 3 | 2 | funeqd 6559 | . . 3 ⊢ (𝐹 = 𝐺 → (Fun ◡𝐹 ↔ Fun ◡𝐺)) |
| 4 | 1, 3 | anbi12d 644 | . 2 ⊢ (𝐹 = 𝐺 → ((𝐹:𝐴⟶𝐵 ∧ Fun ◡𝐹) ↔ (𝐺:𝐴⟶𝐵 ∧ Fun ◡𝐺))) |
| 5 | df-f1 6542 | . 2 ⊢ (𝐹:𝐴–1-1→𝐵 ↔ (𝐹:𝐴⟶𝐵 ∧ Fun ◡𝐹)) | |
| 6 | df-f1 6542 | . 2 ⊢ (𝐺:𝐴–1-1→𝐵 ↔ (𝐺:𝐴⟶𝐵 ∧ Fun ◡𝐺)) | |
| 7 | 4, 5, 6 | 3bitr4g 317 | 1 ⊢ (𝐹 = 𝐺 → (𝐹:𝐴–1-1→𝐵 ↔ 𝐺:𝐴–1-1→𝐵)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 ↔ wb 209 ∧ wa 401 = wceq 1570 ◡ccnv 5650 Fun wfun 6531 ⟶wf 6533 –1-1→wf1 6534 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2733 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2740 df-cleq 2753 df-clel 2836 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-br 5104 df-opab 5168 df-rel 5658 df-cnv 5659 df-co 5660 df-dm 5661 df-rn 5662 df-fun 6539 df-fn 6540 df-f 6541 df-f1 6542 |
| This theorem is used by: f1oeq1 6810 f1eq123d 6814 fo00 6859 f1prex 7290 f1iun 7954 tposf12 8261 oacomf1olem 8565 f1dom4g 8985 f1dom3g 8987 f1domg 8991 dom3d 9014 domtr 9027 0domg 9116 domssex2 9149 marypha1lem 9418 fseqenlem1 10096 dfac12lem2 10216 dfac12lem3 10217 ackbij2 10313 fin23lem28 10411 fin23lem32 10415 fin23lem34 10417 fin23lem35 10418 fin23lem41 10423 iundom2g 10617 pwfseqlem5 10741 hashf1lem1 14593 hashf1lem2 14594 hashf1 14595 4sqlem11 17126 injsubmefmnd 19086 conjsubgen 19458 sylow1lem2 19806 sylow2blem1 19827 hauspwpwf1 24299 oldfib 28756 istrkg2ld 28915 axlowdim 29532 sizusglecusg 30037 specval 32493 aciunf1lem 33249 zrhchr 34599 qqhre 34645 vonf1oonf1 35876 hashnexinj 43158 eldioph2lem2 43751 meadjiunlem 47444 fcoresf1b 48109 fundcmpsurbijinjpreimafv 48458 fundcmpsurinjpreimafv 48459 fundcmpsurinjimaid 48462 f1sn2g 49930 f102g 49931 |
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