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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 7195 f13dfv 7271 poxp2 8139 xpord3lem 8145 poxp3 8146 xpord3pred 8148 axgroth5 10866 axgroth6 10870 hash7g 14584 cotr2g 15082 cbvprod 16035 cbvprodv 16036 prodeq1i 16038 isstruct 17277 pmtr3ncomlem1 19634 opprsubg 20529 addcuts 28283 mulcut 28437 ons2ind 28580 issubgr 29771 nbgrsym 29863 nb3grpr 29882 cplgr3v 29935 usgr2pthlem 30268 umgr2adedgwlk 30453 usgrwwlks2on 30466 umgrwwlks2on 30467 elwspths2spth 30478 clwwlkccat 30500 clwlkclwwlk 30512 3wlkdlem8 30687 frgr3v 30795 or3dir 32977 unelldsys 34710 bnj156 35279 bnj206 35282 bnj887 35316 bnj121 35420 bnj130 35424 bnj605 35457 bnj581 35458 brpprod3b 36565 brapply 36616 brrestrict 36629 dfrdg4 36631 brsegle 36789 prodeq2si 36909 cbvprodvw2 36952 dfeqvrels3 39519 tendoset 41730 grtriproplem 48953 grtrif1o 48956 usgrexmpl2trifr 49051 gpg5nbgrvtx03starlem1 49082 gpg5nbgrvtx03starlem2 49083 gpg5nbgrvtx03starlem3 49084 gpg5nbgrvtx13starlem1 49085 gpg5nbgrvtx13starlem2 49086 gpg5nbgrvtx13starlem3 49087 gpg5edgnedg 49144 2arwcatlem1 50619 setc1onsubc 50626 |
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