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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 7017 | . 2 ⊢ ((𝐹:𝐴–1-1→𝐵 ∧ (𝐶 ∈ 𝐴 ∧ 𝐷 ∈ 𝐴)) → ((𝐹‘𝐶) = (𝐹‘𝐷) → 𝐶 = 𝐷)) | |
2 | fveq2 6672 | . 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 1537 ∈ wcel 2114 –1-1→wf1 6354 ‘cfv 6357 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-sep 5205 ax-nul 5212 ax-pr 5332 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ral 3145 df-rex 3146 df-rab 3149 df-v 3498 df-sbc 3775 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-nul 4294 df-if 4470 df-sn 4570 df-pr 4572 df-op 4576 df-uni 4841 df-br 5069 df-opab 5131 df-id 5462 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-f1 6362 df-fv 6365 |
This theorem is referenced by: f1elima 7023 f1dom3fv3dif 7028 cocan1 7049 isof1oidb 7079 isosolem 7102 f1oiso 7106 weniso 7109 f1oweALT 7675 2dom 8584 xpdom2 8614 wemapwe 9162 fseqenlem1 9452 dfac12lem2 9572 infpssrlem4 9730 fin23lem28 9764 isf32lem7 9783 iundom2g 9964 canthnumlem 10072 canthwelem 10074 canthp1lem2 10077 pwfseqlem4 10086 seqf1olem1 13412 bitsinv2 15794 bitsf1 15797 sadasslem 15821 sadeq 15823 bitsuz 15825 eulerthlem2 16121 f1ocpbllem 16799 f1ovscpbl 16801 fthi 17190 ghmf1 18389 f1omvdmvd 18573 odf1 18691 dprdf1o 19156 ply1scln0 20461 zntoslem 20705 iporthcom 20781 cnt0 21956 cnhaus 21964 imasdsf1olem 22985 imasf1oxmet 22987 dyadmbl 24203 vitalilem3 24213 dvcnvlem 24575 facth1 24760 usgredg2v 27011 cycpmco2lem6 30775 erdszelem9 32448 cvmliftmolem1 32530 msubff1 32805 metf1o 35032 rngoisocnv 35261 laut11 37224 gicabl 39706 fourierdlem50 42448 |
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