Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > orbi2i | Structured version Visualization version GIF version |
Description: Inference adding a left disjunct to both sides of a logical equivalence. (Contributed by NM, 3-Jan-1993.) (Proof shortened by Wolf Lammen, 12-Dec-2012.) |
Ref | Expression |
---|---|
orbi2i.1 | ⊢ (𝜑 ↔ 𝜓) |
Ref | Expression |
---|---|
orbi2i | ⊢ ((𝜒 ∨ 𝜑) ↔ (𝜒 ∨ 𝜓)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | orbi2i.1 | . . . 4 ⊢ (𝜑 ↔ 𝜓) | |
2 | 1 | biimpi 218 | . . 3 ⊢ (𝜑 → 𝜓) |
3 | 2 | orim2i 907 | . 2 ⊢ ((𝜒 ∨ 𝜑) → (𝜒 ∨ 𝜓)) |
4 | 1 | biimpri 230 | . . 3 ⊢ (𝜓 → 𝜑) |
5 | 4 | orim2i 907 | . 2 ⊢ ((𝜒 ∨ 𝜓) → (𝜒 ∨ 𝜑)) |
6 | 3, 5 | impbii 211 | 1 ⊢ ((𝜒 ∨ 𝜑) ↔ (𝜒 ∨ 𝜓)) |
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: orbi1i 910 orbi12i 911 orass 918 or4 923 or42 924 orordir 926 dn1 1052 dfifp6 1063 excxor 1507 nf3 1787 nfnbi 1855 19.44v 1999 19.44 2239 r19.30OLD 3341 sspsstri 4081 unass 4144 undi 4253 undif3 4267 2nreu 4395 undif4 4418 ssunpr 4767 sspr 4768 sstp 4769 pr1eqbg 4789 iinun2 4997 iinuni 5022 qfto 5983 somin1 5995 ordtri2 6228 on0eqel 6310 frxp 7822 wfrlem14 7970 wfrlem15 7971 supgtoreq 8936 wemapsolem 9016 fin1a2lem12 9835 psslinpr 10455 suplem2pr 10477 fimaxre 11586 fimaxreOLD 11587 elnn0 11902 elxnn0 11972 elnn1uz2 12328 elxr 12514 xrinfmss 12706 elfzp1 12960 hashf1lem2 13817 dvdslelem 15661 pythagtrip 16173 tosso 17648 maducoeval2 21251 madugsum 21254 ist0-3 21955 limcdif 24476 ellimc2 24477 limcmpt 24483 limcres 24486 plydivex 24888 taylfval 24949 legtrid 26379 legso 26387 lmicom 26576 numedglnl 26931 nb3grprlem2 27165 clwwlkneq0 27809 atomli 30161 atoml2i 30162 or3di 30227 disjnf 30322 disjex 30344 disjexc 30345 cycpmrn 30787 orngsqr 30879 ind1a 31280 esumcvg 31347 voliune 31490 volfiniune 31491 bnj964 32217 satfvsucsuc 32614 satfrnmapom 32619 satf0op 32626 fmlaomn0 32639 dfso2 32992 soseq 33098 frrlem12 33136 lineunray 33610 bj-dfbi4 33908 poimirlem18 34912 poimirlem23 34917 poimirlem27 34921 poimirlem31 34925 itg2addnclem2 34946 tsxo1 35417 tsxo2 35418 tsxo3 35419 tsxo4 35420 tsna1 35424 tsna2 35425 tsna3 35426 ts3an1 35430 ts3an2 35431 ts3an3 35432 ts3or1 35433 ts3or2 35434 ts3or3 35435 dfeldisj5 35956 ifpim123g 39873 ifpor123g 39881 rp-fakeoranass 39887 ontric3g 39895 frege133d 40117 or3or 40378 undif3VD 41223 wallispilem3 42359 iccpartgt 43594 nnsum4primeseven 43972 nnsum4primesevenALTV 43973 lindslinindsimp2 44525 |
Copyright terms: Public domain | W3C validator |