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| Mirrors > Home > MPE Home > Th. List > 3anbi123i | Structured version Visualization version GIF version | ||
| Description: Join 3 biconditionals with conjunction. (Contributed by NM, 21-Apr-1994.) |
| Ref | Expression |
|---|---|
| bi3.1 | ⊢ (𝜑 ↔ 𝜓) |
| bi3.2 | ⊢ (𝜒 ↔ 𝜃) |
| bi3.3 | ⊢ (𝜏 ↔ 𝜂) |
| Ref | Expression |
|---|---|
| 3anbi123i | ⊢ ((𝜑 ∧ 𝜒 ∧ 𝜏) ↔ (𝜓 ∧ 𝜃 ∧ 𝜂)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bi3.1 | . . . 4 ⊢ (𝜑 ↔ 𝜓) | |
| 2 | bi3.2 | . . . 4 ⊢ (𝜒 ↔ 𝜃) | |
| 3 | 1, 2 | anbi12i 640 | . . 3 ⊢ ((𝜑 ∧ 𝜒) ↔ (𝜓 ∧ 𝜃)) |
| 4 | bi3.3 | . . 3 ⊢ (𝜏 ↔ 𝜂) | |
| 5 | 3, 4 | anbi12i 640 | . 2 ⊢ (((𝜑 ∧ 𝜒) ∧ 𝜏) ↔ ((𝜓 ∧ 𝜃) ∧ 𝜂)) |
| 6 | df-3an 1105 | . 2 ⊢ ((𝜑 ∧ 𝜒 ∧ 𝜏) ↔ ((𝜑 ∧ 𝜒) ∧ 𝜏)) | |
| 7 | df-3an 1105 | . 2 ⊢ ((𝜓 ∧ 𝜃 ∧ 𝜂) ↔ ((𝜓 ∧ 𝜃) ∧ 𝜂)) | |
| 8 | 5, 6, 7 | 3bitr4i 306 | 1 ⊢ ((𝜑 ∧ 𝜒 ∧ 𝜏) ↔ (𝜓 ∧ 𝜃 ∧ 𝜂)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ↔ wb 209 ∧ wa 401 ∧ w3a 1103 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 |
| This proof depends on definitions: df-bi 210 df-an 402 df-3an 1105 |
| This theorem is used by: 3anbi1i 1175 3anbi2i 1176 3anbi3i 1177 syl3anb 1179 an33rean 1514 cadnot 1647 fvtp0 7206 f13dfv 7282 poxp2 8160 xpord3lem 8166 poxp3 8167 xpord3pred 8169 axgroth5 10909 axgroth6 10913 hash7g 14631 cotr2g 15129 cbvprod 16082 cbvprodv 16083 prodeq1i 16085 isstruct 17330 pmtr3ncomlem1 19687 opprsubg 20582 addcuts 28364 mulcut 28518 ons2ind 28661 issubgr 29852 nbgrsym 29944 nb3grpr 29963 cplgr3v 30016 usgr2pthlem 30349 umgr2adedgwlk 30534 usgrwwlks2on 30547 umgrwwlks2on 30548 elwspths2spth 30559 clwwlkccat 30581 clwlkclwwlk 30593 3wlkdlem8 30768 frgr3v 30876 or3dir 33058 unelldsys 34791 bnj156 35359 bnj206 35362 bnj887 35396 bnj121 35500 bnj130 35504 bnj605 35537 bnj581 35538 brpprod3b 36649 brapply 36700 brrestrict 36713 dfrdg4 36715 brsegle 36873 prodeq2si 36993 cbvprodvw2 37036 dfeqvrels3 39606 tendoset 41817 grtriproplem 49037 grtrif1o 49040 usgrexmpl2trifr 49135 gpg5nbgrvtx03starlem1 49166 gpg5nbgrvtx03starlem2 49167 gpg5nbgrvtx03starlem3 49168 gpg5nbgrvtx13starlem1 49169 gpg5nbgrvtx13starlem2 49170 gpg5nbgrvtx13starlem3 49171 gpg5edgnedg 49228 2arwcatlem1 50703 setc1onsubc 50710 |
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