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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 6802 | . . 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 1537 ∈ wcel 2114 ∀wral 3138 Fn wfn 6350 ‘cfv 6355 |
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 2793 ax-sep 5203 ax-nul 5210 ax-pow 5266 ax-pr 5330 |
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 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 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 4568 df-pr 4570 df-op 4574 df-uni 4839 df-br 5067 df-opab 5129 df-mpt 5147 df-id 5460 df-xp 5561 df-rel 5562 df-cnv 5563 df-co 5564 df-dm 5565 df-rn 5566 df-res 5567 df-ima 5568 df-iota 6314 df-fun 6357 df-fn 6358 df-fv 6363 |
This theorem is referenced by: foeqcnvco 7056 f1eqcocnv 7057 offveq 7430 tfrlem1 8012 updjudhcoinlf 9361 updjudhcoinrg 9362 ackbij2lem2 9662 ackbij2lem3 9663 fpwwe2lem8 10059 seqfeq2 13394 seqfeq 13396 seqfeq3 13421 ccatlid 13940 ccatrid 13941 ccatass 13942 ccatswrd 14030 swrdccat2 14031 pfxid 14046 ccatpfx 14063 pfxccat1 14064 swrdswrd 14067 cats1un 14083 swrdccatin1 14087 swrdccatin2 14091 pfxccatin12 14095 revccat 14128 revrev 14129 cshco 14198 swrdco 14199 seqshft 14444 seq1st 15915 xpsfeq 16836 yonedainv 17531 pwsco1mhm 17996 f1otrspeq 18575 pmtrfinv 18589 symgtrinv 18600 frgpup3lem 18903 ablfac1eu 19195 psrlidm 20183 psrridm 20184 psrass1 20185 subrgascl 20278 evlslem1 20295 psgndiflemB 20744 frlmup1 20942 frlmup3 20944 frlmup4 20945 mavmulass 21158 upxp 22231 uptx 22233 cnextfres1 22676 ovolshftlem1 24110 volsup 24157 dvidlem 24513 dvrec 24552 dveq0 24597 dv11cn 24598 ftc1cn 24640 coemulc 24845 aannenlem1 24917 ulmuni 24980 ulmdv 24991 ostthlem1 26203 nvinvfval 28417 sspn 28513 kbass2 29894 xppreima2 30395 psgnfzto1stlem 30742 cycpmco2 30775 cyc3co2 30782 indpreima 31284 esumcvg 31345 signstres 31845 hgt750lemb 31927 revpfxsfxrev 32362 subfacp1lem4 32430 cvmliftmolem2 32529 msubff1 32803 iprodefisumlem 32972 poimirlem8 34915 poimirlem13 34920 poimirlem14 34921 ftc1cnnc 34981 eqlkr3 36252 cdleme51finvN 37707 frlmvscadiccat 39165 ismrcd2 39316 rfovcnvf1od 40370 dssmapntrcls 40498 dvconstbi 40686 fsumsermpt 41880 icccncfext 42190 voliooicof 42301 etransclem35 42574 rrxsnicc 42605 ovolval4lem1 42951 zrinitorngc 44291 zrtermorngc 44292 zrtermoringc 44361 |
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