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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 1648 fvtp0 7202 f13dfv 7278 poxp2 8144 xpord3lem 8150 poxp3 8151 xpord3pred 8153 axgroth5 10836 axgroth6 10840 hash7g 14553 cotr2g 15051 cbvprod 16004 cbvprodv 16005 prodeq1i 16007 isstruct 17248 pmtr3ncomlem1 19601 opprsubg 20494 addcuts 28241 mulcut 28395 ons2ind 28538 issubgr 29717 nbgrsym 29809 nb3grpr 29828 cplgr3v 29881 usgr2pthlem 30214 umgr2adedgwlk 30399 usgrwwlks2on 30412 umgrwwlks2on 30413 elwspths2spth 30424 clwwlkccat 30446 clwlkclwwlk 30458 3wlkdlem8 30633 frgr3v 30741 or3dir 32923 unelldsys 34656 bnj156 35225 bnj206 35228 bnj887 35262 bnj121 35366 bnj130 35370 bnj605 35403 bnj581 35404 brpprod3b 36451 brapply 36502 brrestrict 36515 dfrdg4 36517 brsegle 36675 prodeq2si 36811 cbvprodvw2 36854 dfeqvrels3 39408 tendoset 41619 grtriproplem 48842 grtrif1o 48845 usgrexmpl2trifr 48940 gpg5nbgrvtx03starlem1 48971 gpg5nbgrvtx03starlem2 48972 gpg5nbgrvtx03starlem3 48973 gpg5nbgrvtx13starlem1 48974 gpg5nbgrvtx13starlem2 48975 gpg5nbgrvtx13starlem3 48976 gpg5edgnedg 49033 2arwcatlem1 50508 setc1onsubc 50515 |
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