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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 7209 | . 2 ⊢ ((𝐹:𝐴–1-1→𝐵 ∧ (𝐶 ∈ 𝐴 ∧ 𝐷 ∈ 𝐴)) → ((𝐹‘𝐶) = (𝐹‘𝐷) → 𝐶 = 𝐷)) | |
2 | fveq2 6847 | . 2 ⊢ (𝐶 = 𝐷 → (𝐹‘𝐶) = (𝐹‘𝐷)) | |
3 | 1, 2 | impbid1 224 | 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 205 ∧ wa 396 = wceq 1541 ∈ wcel 2106 –1-1→wf1 6498 ‘cfv 6501 |
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 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2702 ax-sep 5261 ax-nul 5268 ax-pr 5389 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-nf 1786 df-sb 2068 df-mo 2533 df-eu 2562 df-clab 2709 df-cleq 2723 df-clel 2809 df-ne 2940 df-ral 3061 df-rex 3070 df-rab 3406 df-v 3448 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4288 df-if 4492 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4871 df-br 5111 df-opab 5173 df-id 5536 df-xp 5644 df-rel 5645 df-cnv 5646 df-co 5647 df-dm 5648 df-iota 6453 df-fun 6503 df-fn 6504 df-f 6505 df-f1 6506 df-fv 6509 |
This theorem is referenced by: f1elima 7215 f1dom3fv3dif 7220 cocan1 7242 isof1oidb 7274 isosolem 7297 f1oiso 7301 weniso 7304 f1oweALT 7910 2dom 8981 xpdom2 9018 wemapwe 9642 fseqenlem1 9969 dfac12lem2 10089 infpssrlem4 10251 fin23lem28 10285 isf32lem7 10304 iundom2g 10485 canthnumlem 10593 canthwelem 10595 canthp1lem2 10598 pwfseqlem4 10607 seqf1olem1 13957 bitsinv2 16334 bitsf1 16337 sadasslem 16361 sadeq 16363 bitsuz 16365 eulerthlem2 16665 f1ocpbllem 17420 f1ovscpbl 17422 fthi 17819 ghmf1 19051 f1omvdmvd 19239 odf1 19358 dprdf1o 19825 zntoslem 21000 iporthcom 21076 ply1scln0 21699 cnt0 22734 cnhaus 22742 imasdsf1olem 23763 imasf1oxmet 23765 dyadmbl 25001 vitalilem3 25011 dvcnvlem 25377 facth1 25566 usgredg2v 28238 cycpmco2lem6 32050 erdszelem9 33880 cvmliftmolem1 33962 msubff1 34237 metf1o 36287 rngoisocnv 36513 laut11 38622 gicabl 41484 fourierdlem50 44517 |
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