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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 2949 | . 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 6219 | . . 3 ⊢ ((𝐹 Fn 𝐴 ∧ 𝐺 Fn 𝐴) → (𝐹 = 𝐺 ↔ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) = (𝐺‘𝑥))) | |
6 | 3, 4, 5 | syl2anc 691 | . 2 ⊢ (𝜑 → (𝐹 = 𝐺 ↔ ∀𝑥 ∈ 𝐴 (𝐹‘𝑥) = (𝐺‘𝑥))) |
7 | 2, 6 | mpbird 246 | 1 ⊢ (𝜑 → 𝐹 = 𝐺) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ↔ wb 195 ∧ wa 383 = wceq 1475 ∈ wcel 1977 ∀wral 2896 Fn wfn 5799 ‘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-8 1979 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-pow 4769 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-csb 3500 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-mpt 4645 df-id 4953 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-iota 5768 df-fun 5806 df-fn 5807 df-fv 5812 |
This theorem is referenced by: foeqcnvco 6455 f1eqcocnv 6456 offveq 6816 tfrlem1 7359 ackbij2lem2 8945 ackbij2lem3 8946 fpwwe2lem8 9338 seqfeq2 12686 seqfeq 12688 seqfeq3 12713 ccatlid 13222 ccatrid 13223 ccatass 13224 swrdid 13280 ccatswrd 13308 swrdccat1 13309 swrdccat2 13310 swrdswrd 13312 cats1un 13327 swrdccatin1 13334 swrdccatin2 13338 swrdccatin12 13342 revccat 13366 revrev 13367 cshco 13433 swrdco 13434 seqshft 13673 seq1st 15122 xpsfeq 16047 yonedainv 16744 pwsco1mhm 17193 f1otrspeq 17690 pmtrfinv 17704 symgtrinv 17715 frgpup3lem 18013 ablfac1eu 18295 psrlidm 19224 psrridm 19225 psrass1 19226 subrgascl 19319 evlslem1 19336 psgndiflemB 19765 frlmup1 19956 frlmup3 19958 frlmup4 19959 mavmulass 20174 upxp 21236 uptx 21238 cnextfres1 21682 ovolshftlem1 23084 volsup 23131 dvidlem 23485 dvrec 23524 dveq0 23567 dv11cn 23568 ftc1cn 23610 coemulc 23815 aannenlem1 23887 ulmuni 23950 ulmdv 23961 ostthlem1 25116 nvinvfval 26879 sspn 26975 kbass2 28360 xppreima2 28830 psgnfzto1stlem 29181 indpreima 29414 esumcvg 29475 signstres 29978 subfacp1lem4 30419 cvmliftmolem2 30518 msubff1 30707 iprodefisumlem 30879 poimirlem8 32587 poimirlem13 32592 poimirlem14 32593 ftc1cnnc 32654 eqlkr3 33406 cdleme51finvN 34862 ismrcd2 36280 rfovcnvf1od 37318 dssmapntrcls 37446 dvconstbi 37555 fsumsermpt 38646 icccncfext 38773 voliooicof 38889 etransclem35 39162 rrxsnicc 39196 ovolval4lem1 39539 ccatpfx 40272 pfxccat1 40273 pfxccatin12 40288 zrinitorngc 41792 zrtermorngc 41793 zrtermoringc 41862 |
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