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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 7203 f13dfv 7279 poxp2 8145 xpord3lem 8151 poxp3 8152 xpord3pred 8154 axgroth5 10837 axgroth6 10841 hash7g 14555 cotr2g 15053 cbvprod 16006 cbvprodv 16007 prodeq1i 16009 isstruct 17250 pmtr3ncomlem1 19606 opprsubg 20499 addcuts 28251 mulcut 28405 ons2ind 28548 issubgr 29739 nbgrsym 29831 nb3grpr 29850 cplgr3v 29903 usgr2pthlem 30236 umgr2adedgwlk 30421 usgrwwlks2on 30434 umgrwwlks2on 30435 elwspths2spth 30446 clwwlkccat 30468 clwlkclwwlk 30480 3wlkdlem8 30655 frgr3v 30763 or3dir 32945 unelldsys 34677 bnj156 35246 bnj206 35249 bnj887 35283 bnj121 35387 bnj130 35391 bnj605 35424 bnj581 35425 brpprod3b 36472 brapply 36523 brrestrict 36536 dfrdg4 36538 brsegle 36696 prodeq2si 36832 cbvprodvw2 36875 dfeqvrels3 39429 tendoset 41640 grtriproplem 48863 grtrif1o 48866 usgrexmpl2trifr 48961 gpg5nbgrvtx03starlem1 48992 gpg5nbgrvtx03starlem2 48993 gpg5nbgrvtx03starlem3 48994 gpg5nbgrvtx13starlem1 48995 gpg5nbgrvtx13starlem2 48996 gpg5nbgrvtx13starlem3 48997 gpg5edgnedg 49054 2arwcatlem1 50529 setc1onsubc 50536 |
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