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Mirrors > Home > MPE Home > Th. List > orbi12i | Structured version Visualization version GIF version |
Description: Infer the disjunction of two equivalences. (Contributed by NM, 3-Jan-1993.) |
Ref | Expression |
---|---|
orbi12i.1 | ⊢ (𝜑 ↔ 𝜓) |
orbi12i.2 | ⊢ (𝜒 ↔ 𝜃) |
Ref | Expression |
---|---|
orbi12i | ⊢ ((𝜑 ∨ 𝜒) ↔ (𝜓 ∨ 𝜃)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | orbi12i.2 | . . 3 ⊢ (𝜒 ↔ 𝜃) | |
2 | 1 | orbi2i 909 | . 2 ⊢ ((𝜑 ∨ 𝜒) ↔ (𝜑 ∨ 𝜃)) |
3 | orbi12i.1 | . . 3 ⊢ (𝜑 ↔ 𝜓) | |
4 | 3 | orbi1i 910 | . 2 ⊢ ((𝜑 ∨ 𝜃) ↔ (𝜓 ∨ 𝜃)) |
5 | 2, 4 | bitri 277 | 1 ⊢ ((𝜑 ∨ 𝜒) ↔ (𝜓 ∨ 𝜃)) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 208 ∨ wo 843 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 |
This theorem depends on definitions: df-bi 209 df-or 844 |
This theorem is referenced by: pm4.78 931 andir 1005 anddi 1007 cases 1037 cases2 1042 3orbi123i 1152 3or6 1443 noran 1526 noranOLD 1527 cadcoma 1613 neorian 3113 sspsstri 4081 rexun 4168 elsymdif 4226 indi 4252 unab 4272 dfnf5 4336 inundif 4429 dfpr2 4588 ssunsn 4763 ssunpr 4767 sspr 4768 sstp 4769 prneimg 4787 prnebg 4788 pwpr 4834 pwtp 4835 unipr 4857 uniun 4863 iunun 5017 iunxun 5018 brun 5119 zfpair 5324 opthneg 5375 propeqop 5399 pwunssOLD 5457 opthprc 5618 dmopab2rex 5788 xpeq0 6019 difxp 6023 ordtri2or3 6290 ftpg 6920 ordunpr 7543 mpoxneldm 7880 tpostpos 7914 oarec 8190 brdom2 8541 modom 8721 dfsup2 8910 wemapsolem 9016 djuunxp 9352 leweon 9439 kmlem16 9593 fin23lem40 9775 axpre-lttri 10589 nn0n0n1ge2b 11966 elnn0z 11997 fz0 12925 sqeqori 13579 hashtpg 13846 swrdnnn0nd 14020 swrdnd0 14021 cbvsum 15054 cbvprod 15271 rpnnen2lem12 15580 lcmfpr 15973 pythagtriplem2 16156 pythagtrip 16173 mreexexd 16921 smndex1basss 18072 smndex1mgm 18074 smndex1n0mnd 18079 cnfldfunALT 20560 ppttop 21617 fixufil 22532 alexsubALTlem2 22658 alexsubALTlem3 22659 alexsubALTlem4 22660 dyaddisj 24199 clwwlkneq0 27809 ofpreima2 30413 odutos 30652 trleile 30655 prmidl2 30960 smatrcl 31063 ordtconnlem1 31169 sitgaddlemb 31608 satfvsuclem2 32609 satfvsucsuc 32614 satfdm 32618 satf0 32621 satffunlem2lem1 32653 dmopab3rexdif 32654 quad3 32915 nepss 32950 dfso2 32992 dfon2lem4 33033 dfon2lem5 33034 frrlem13 33137 dfon3 33355 brcup 33402 dfrdg4 33414 hfun 33641 bj-df-ifc 33915 bj-eltag 34291 bj-projun 34308 poimirlem22 34916 poimirlem31 34925 poimirlem32 34926 ispridl2 35318 smprngopr 35332 isdmn3 35354 sbcori 35389 tsbi4 35416 4atlem3 36734 elpadd 36937 paddasslem17 36974 cdlemg31b0N 37832 cdlemg31b0a 37833 cdlemh 37955 jm2.23 39600 ifpim123g 39873 ifpananb 39879 rp-isfinite6 39891 iunrelexp0 40054 clsk1indlem3 40400 aovov0bi 43402 zeoALTV 43842 divgcdoddALTV 43854 rrx2pnedifcoorneor 44710 line2xlem 44747 |
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