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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 1515 cadnot 1648 fvtp0 7226 f13dfv 7302 poxp2 8184 xpord3lem 8190 poxp3 8191 xpord3pred 8193 axgroth5 10933 axgroth6 10937 hash7g 14655 cotr2g 15155 cbvprod 16108 cbvprodv 16109 prodeq1i 16111 isstruct 17356 pmtr3ncomlem1 19714 opprsubg 20609 addcuts 28391 mulcut 28545 ons2ind 28688 issubgr 29879 nbgrsym 29971 nb3grpr 29990 cplgr3v 30043 usgr2pthlem 30376 umgr2adedgwlk 30561 usgrwwlks2on 30574 umgrwwlks2on 30575 elwspths2spth 30586 clwwlkccat 30608 clwlkclwwlk 30620 3wlkdlem8 30795 frgr3v 30903 or3dir 33127 unelldsys 34858 bnj156 35426 bnj206 35429 bnj887 35463 bnj121 35567 bnj130 35571 bnj605 35604 bnj581 35605 brpprod3b 36826 brapply 36877 brrestrict 36890 dfrdg4 36892 brsegle 37050 prodeq2si 37170 cbvprodvw2 37213 dfeqvrels3 39796 tendoset 42007 grtriproplem 49240 grtrif1o 49243 usgrexmpl2trifr 49338 gpg5nbgrvtx03starlem1 49369 gpg5nbgrvtx03starlem2 49370 gpg5nbgrvtx03starlem3 49371 gpg5nbgrvtx13starlem1 49372 gpg5nbgrvtx13starlem2 49373 gpg5nbgrvtx13starlem3 49374 gpg5edgnedg 49431 2arwcatlem1 50936 setc1onsubc 50943 |
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