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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 639 | . . 3 ⊢ ((𝜑 ∧ 𝜒) ↔ (𝜓 ∧ 𝜃)) |
| 4 | bi3.3 | . . 3 ⊢ (𝜏 ↔ 𝜂) | |
| 5 | 3, 4 | anbi12i 639 | . 2 ⊢ (((𝜑 ∧ 𝜒) ∧ 𝜏) ↔ ((𝜓 ∧ 𝜃) ∧ 𝜂)) |
| 6 | df-3an 1104 | . 2 ⊢ ((𝜑 ∧ 𝜒 ∧ 𝜏) ↔ ((𝜑 ∧ 𝜒) ∧ 𝜏)) | |
| 7 | df-3an 1104 | . 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 400 ∧ w3a 1102 |
| 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 401 df-3an 1104 |
| This theorem is used by: 3anbi1i 1174 3anbi2i 1175 3anbi3i 1176 syl3anb 1178 an33rean 1513 cadnot 1644 f13dfv 7272 poxp2 8137 xpord3lem 8143 poxp3 8144 xpord3pred 8146 axgroth5 10815 axgroth6 10819 hash7g 14530 cotr2g 15020 cbvprod 15974 cbvprodv 15975 prodeq1i 15977 isstruct 17218 pmtr3ncomlem1 19549 opprsubg 20441 addcuts 28182 mulcut 28336 ons2ind 28479 issubgr 29632 nbgrsym 29724 nb3grpr 29743 cplgr3v 29796 usgr2pthlem 30123 umgr2adedgwlk 30305 usgrwwlks2on 30318 umgrwwlks2on 30319 elwspths2spth 30330 clwwlkccat 30352 clwlkclwwlk 30364 3wlkdlem8 30529 frgr3v 30637 or3dir 32819 unelldsys 34557 bnj156 35126 bnj206 35129 bnj887 35163 bnj121 35267 bnj130 35271 bnj605 35304 bnj581 35305 brpprod3b 36385 brapply 36436 brrestrict 36449 dfrdg4 36451 brsegle 36608 prodeq2si 36744 cbvprodvw2 36787 dfeqvrels3 39350 tendoset 41561 grtriproplem 48732 grtrif1o 48735 usgrexmpl2trifr 48830 gpg5nbgrvtx03starlem1 48861 gpg5nbgrvtx03starlem2 48862 gpg5nbgrvtx03starlem3 48863 gpg5nbgrvtx13starlem1 48864 gpg5nbgrvtx13starlem2 48865 gpg5nbgrvtx13starlem3 48866 gpg5edgnedg 48923 2arwcatlem1 50401 setc1onsubc 50408 |
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