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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 910 | . 2 ⊢ ((𝜑 ∨ 𝜒) ↔ (𝜑 ∨ 𝜃)) |
3 | orbi12i.1 | . . 3 ⊢ (𝜑 ↔ 𝜓) | |
4 | 3 | orbi1i 911 | . 2 ⊢ ((𝜑 ∨ 𝜃) ↔ (𝜓 ∨ 𝜃)) |
5 | 2, 4 | bitri 278 | 1 ⊢ ((𝜑 ∨ 𝜒) ↔ (𝜓 ∨ 𝜃)) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 209 ∨ wo 844 |
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 210 df-or 845 |
This theorem is referenced by: pm4.78 932 andir 1006 anddi 1008 cases 1038 cases2 1043 3orbi123i 1153 3or6 1444 noran 1527 noranOLD 1528 cadcoma 1614 neorian 3081 sspsstri 4030 rexun 4117 elsymdif 4174 indi 4200 unab 4222 dfnf5 4288 inundif 4385 dfpr2 4544 ssunsn 4721 ssunpr 4725 sspr 4726 sstp 4727 prneimg 4745 prnebg 4746 pwpr 4794 pwtp 4795 unipr 4817 uniun 4823 iunun 4978 iunxun 4979 brun 5081 zfpair 5287 opthneg 5338 propeqop 5362 pwunssOLD 5420 opthprc 5580 dmopab2rex 5750 xpeq0 5984 difxp 5988 ordtri2or3 6256 ftpg 6895 ordunpr 7521 mpoxneldm 7861 tpostpos 7895 oarec 8171 brdom2 8522 modom 8703 dfsup2 8892 wemapsolem 8998 djuunxp 9334 leweon 9422 kmlem16 9576 fin23lem40 9762 axpre-lttri 10576 nn0n0n1ge2b 11951 elnn0z 11982 fz0 12917 sqeqori 13572 hashtpg 13839 swrdnnn0nd 14009 swrdnd0 14010 cbvsum 15044 cbvprod 15261 rpnnen2lem12 15570 lcmfpr 15961 pythagtriplem2 16144 pythagtrip 16161 mreexexd 16911 smndex1basss 18062 smndex1mgm 18064 smndex1n0mnd 18069 cnfldfunALT 20104 ppttop 21612 fixufil 22527 alexsubALTlem2 22653 alexsubALTlem3 22654 alexsubALTlem4 22655 dyaddisj 24200 clwwlkneq0 27814 ofpreima2 30429 odutos 30676 trleile 30679 prmidl2 31024 prmidl0 31034 smatrcl 31149 ordtconnlem1 31277 sitgaddlemb 31716 satfvsuclem2 32720 satfvsucsuc 32725 satfdm 32729 satf0 32732 satffunlem2lem1 32764 dmopab3rexdif 32765 quad3 33026 nepss 33061 dfso2 33103 dfon2lem4 33144 dfon2lem5 33145 frrlem13 33248 dfon3 33466 brcup 33513 dfrdg4 33525 hfun 33752 bj-df-ifc 34026 bj-eltag 34413 bj-projun 34430 poimirlem22 35079 poimirlem31 35088 poimirlem32 35089 ispridl2 35476 smprngopr 35490 isdmn3 35512 sbcori 35547 tsbi4 35574 4atlem3 36892 elpadd 37095 paddasslem17 37132 cdlemg31b0N 37990 cdlemg31b0a 37991 cdlemh 38113 jm2.23 39937 ifpim123g 40208 ifpananb 40214 rp-isfinite6 40226 iunrelexp0 40403 clsk1indlem3 40746 aovov0bi 43752 zeoALTV 44188 divgcdoddALTV 44200 rrx2pnedifcoorneor 45130 line2xlem 45167 |
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