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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 7014 | . 2 ⊢ ((𝐹:𝐴–1-1→𝐵 ∧ (𝐶 ∈ 𝐴 ∧ 𝐷 ∈ 𝐴)) → ((𝐹‘𝐶) = (𝐹‘𝐷) → 𝐶 = 𝐷)) | |
2 | fveq2 6669 | . 2 ⊢ (𝐶 = 𝐷 → (𝐹‘𝐶) = (𝐹‘𝐷)) | |
3 | 1, 2 | impbid1 227 | 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 208 ∧ wa 398 = wceq 1533 ∈ wcel 2110 –1-1→wf1 6351 ‘cfv 6354 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 ax-sep 5202 ax-nul 5209 ax-pr 5329 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-sbc 3772 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-nul 4291 df-if 4467 df-sn 4567 df-pr 4569 df-op 4573 df-uni 4838 df-br 5066 df-opab 5128 df-id 5459 df-xp 5560 df-rel 5561 df-cnv 5562 df-co 5563 df-dm 5564 df-iota 6313 df-fun 6356 df-fn 6357 df-f 6358 df-f1 6359 df-fv 6362 |
This theorem is referenced by: f1elima 7020 f1dom3fv3dif 7025 cocan1 7046 isof1oidb 7076 isosolem 7099 f1oiso 7103 weniso 7106 f1oweALT 7672 2dom 8581 xpdom2 8611 wemapwe 9159 fseqenlem1 9449 dfac12lem2 9569 infpssrlem4 9727 fin23lem28 9761 isf32lem7 9780 iundom2g 9961 canthnumlem 10069 canthwelem 10071 canthp1lem2 10074 pwfseqlem4 10083 seqf1olem1 13408 bitsinv2 15791 bitsf1 15794 sadasslem 15818 sadeq 15820 bitsuz 15822 eulerthlem2 16118 f1ocpbllem 16796 f1ovscpbl 16798 fthi 17187 ghmf1 18386 f1omvdmvd 18570 odf1 18688 dprdf1o 19153 ply1scln0 20458 zntoslem 20702 iporthcom 20778 cnt0 21953 cnhaus 21961 imasdsf1olem 22982 imasf1oxmet 22984 dyadmbl 24200 vitalilem3 24210 dvcnvlem 24572 facth1 24757 usgredg2v 27008 cycpmco2lem6 30773 erdszelem9 32446 cvmliftmolem1 32528 msubff1 32803 metf1o 35029 rngoisocnv 35258 laut11 37221 gicabl 39697 fourierdlem50 42440 |
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