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Mirrors > Home > MPE Home > Th. List > eqfnfvd | Structured version Visualization version GIF version |
Description: Deduction for equality of functions. (Contributed by Mario Carneiro, 24-Jul-2014.) |
Ref | Expression |
---|---|
eqfnfvd.1 | ⊢ (𝜑 → 𝐹 Fn 𝐴) |
eqfnfvd.2 | ⊢ (𝜑 → 𝐺 Fn 𝐴) |
eqfnfvd.3 | ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) = (𝐺‘𝑥)) |
Ref | Expression |
---|---|
eqfnfvd | ⊢ (𝜑 → 𝐹 = 𝐺) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | eqfnfvd.3 | . . 3 ⊢ ((𝜑 ∧ 𝑥 ∈ 𝐴) → (𝐹‘𝑥) = (𝐺‘𝑥)) | |
2 | 1 | ralrimiva 3182 | . 2 ⊢ (𝜑 → ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) = (𝐺‘𝑥)) |
3 | eqfnfvd.1 | . . 3 ⊢ (𝜑 → 𝐹 Fn 𝐴) | |
4 | eqfnfvd.2 | . . 3 ⊢ (𝜑 → 𝐺 Fn 𝐴) | |
5 | eqfnfv 6797 | . . 3 ⊢ ((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) → (𝐹 = 𝐺 ↔ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) = (𝐺‘𝑥))) | |
6 | 3, 4, 5 | syl2anc 586 | . 2 ⊢ (𝜑 → (𝐹 = 𝐺 ↔ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) = (𝐺‘𝑥))) |
7 | 2, 6 | mpbird 259 | 1 ⊢ (𝜑 → 𝐹 = 𝐺) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 208 ∧ wa 398 = wceq 1533 ∈ wcel 2110 ∀wral 3138 Fn wfn 6345 ‘cfv 6350 |
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 2156 ax-12 2172 ax-ext 2793 ax-sep 5196 ax-nul 5203 ax-pow 5259 ax-pr 5322 |
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 3497 df-sbc 3773 df-csb 3884 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4833 df-br 5060 df-opab 5122 df-mpt 5140 df-id 5455 df-xp 5556 df-rel 5557 df-cnv 5558 df-co 5559 df-dm 5560 df-rn 5561 df-res 5562 df-ima 5563 df-iota 6309 df-fun 6352 df-fn 6353 df-fv 6358 |
This theorem is referenced by: foeqcnvco 7050 f1eqcocnv 7051 offveq 7424 tfrlem1 8006 updjudhcoinlf 9355 updjudhcoinrg 9356 ackbij2lem2 9656 ackbij2lem3 9657 fpwwe2lem8 10053 seqfeq2 13387 seqfeq 13389 seqfeq3 13414 ccatlid 13934 ccatrid 13935 ccatass 13936 ccatswrd 14024 swrdccat2 14025 pfxid 14040 ccatpfx 14057 pfxccat1 14058 swrdswrd 14061 cats1un 14077 swrdccatin1 14081 swrdccatin2 14085 pfxccatin12 14089 revccat 14122 revrev 14123 cshco 14192 swrdco 14193 seqshft 14438 seq1st 15909 xpsfeq 16830 yonedainv 17525 pwsco1mhm 17990 f1otrspeq 18569 pmtrfinv 18583 symgtrinv 18594 frgpup3lem 18897 ablfac1eu 19189 psrlidm 20177 psrridm 20178 psrass1 20179 subrgascl 20272 evlslem1 20289 psgndiflemB 20738 frlmup1 20936 frlmup3 20938 frlmup4 20939 mavmulass 21152 upxp 22225 uptx 22227 cnextfres1 22670 ovolshftlem1 24104 volsup 24151 dvidlem 24507 dvrec 24546 dveq0 24591 dv11cn 24592 ftc1cn 24634 coemulc 24839 aannenlem1 24911 ulmuni 24974 ulmdv 24985 ostthlem1 26197 nvinvfval 28411 sspn 28507 kbass2 29888 xppreima2 30389 psgnfzto1stlem 30737 cycpmco2 30770 cyc3co2 30777 indpreima 31279 esumcvg 31340 signstres 31840 hgt750lemb 31922 revpfxsfxrev 32357 subfacp1lem4 32425 cvmliftmolem2 32524 msubff1 32798 iprodefisumlem 32967 poimirlem8 34894 poimirlem13 34899 poimirlem14 34900 ftc1cnnc 34960 eqlkr3 36231 cdleme51finvN 37686 frlmvscadiccat 39138 ismrcd2 39289 rfovcnvf1od 40343 dssmapntrcls 40471 dvconstbi 40659 fsumsermpt 41852 icccncfext 42162 voliooicof 42274 etransclem35 42547 rrxsnicc 42578 ovolval4lem1 42924 zrinitorngc 44264 zrtermorngc 44265 zrtermoringc 44334 |
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