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Mirrors > Home > MPE Home > Th. List > f1fveq | Structured version Visualization version GIF version |
Description: Equality of function values for a one-to-one function. (Contributed by NM, 11-Feb-1997.) |
Ref | Expression |
---|---|
f1fveq | ⊢ ((𝐹:𝐴–1-1→𝐵 ∧ (𝐶 ∈ 𝐴 ∧ 𝐷 ∈ 𝐴)) → ((𝐹‘𝐶) = (𝐹‘𝐷) ↔ 𝐶 = 𝐷)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | f1veqaeq 6418 | . 2 ⊢ ((𝐹:𝐴–1-1→𝐵 ∧ (𝐶 ∈ 𝐴 ∧ 𝐷 ∈ 𝐴)) → ((𝐹‘𝐶) = (𝐹‘𝐷) → 𝐶 = 𝐷)) | |
2 | fveq2 6103 | . 2 ⊢ (𝐶 = 𝐷 → (𝐹‘𝐶) = (𝐹‘𝐷)) | |
3 | 1, 2 | impbid1 214 | 1 ⊢ ((𝐹:𝐴–1-1→𝐵 ∧ (𝐶 ∈ 𝐴 ∧ 𝐷 ∈ 𝐴)) → ((𝐹‘𝐶) = (𝐹‘𝐷) ↔ 𝐶 = 𝐷)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 195 ∧ wa 383 = wceq 1475 ∈ wcel 1977 –1-1→wf1 5801 ‘cfv 5804 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pr 4833 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ral 2901 df-rex 2902 df-rab 2905 df-v 3175 df-sbc 3403 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-sn 4126 df-pr 4128 df-op 4132 df-uni 4373 df-br 4584 df-opab 4644 df-id 4953 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fv 5812 |
This theorem is referenced by: f1elima 6421 f1dom3fv3dif 6425 cocan1 6446 isof1oidb 6474 isosolem 6497 f1oiso 6501 weniso 6504 f1oweALT 7043 2dom 7915 xpdom2 7940 wemapwe 8477 fseqenlem1 8730 dfac12lem2 8849 infpssrlem4 9011 fin23lem28 9045 isf32lem7 9064 iundom2g 9241 canthnumlem 9349 canthwelem 9351 canthp1lem2 9354 pwfseqlem4 9363 seqf1olem1 12702 bitsinv2 15003 bitsf1 15006 sadasslem 15030 sadeq 15032 bitsuz 15034 eulerthlem2 15325 f1ocpbllem 16007 f1ovscpbl 16009 fthi 16401 ghmf1 17512 f1omvdmvd 17686 odf1 17802 dprdf1o 18254 ply1scln0 19482 zntoslem 19724 iporthcom 19799 cnt0 20960 cnhaus 20968 imasdsf1olem 21988 imasf1oxmet 21990 dyadmbl 23174 vitalilem3 23185 dvcnvlem 23543 facth1 23728 usgraidx2v 25922 wlkdvspthlem 26137 cyclnspth 26159 usgrcyclnl2 26169 erdszelem9 30435 cvmliftmolem1 30517 msubff1 30707 metf1o 32721 rngoisocnv 32950 laut11 34390 gicabl 36687 fourierdlem50 39049 usgredg2v 40454 |
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