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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 729 | . . 3 ⊢ ((𝜑 ∧ 𝜒) ↔ (𝜓 ∧ 𝜃)) |
4 | bi3.3 | . . 3 ⊢ (𝜏 ↔ 𝜂) | |
5 | 3, 4 | anbi12i 729 | . 2 ⊢ (((𝜑 ∧ 𝜒) ∧ 𝜏) ↔ ((𝜓 ∧ 𝜃) ∧ 𝜂)) |
6 | df-3an 1033 | . 2 ⊢ ((𝜑 ∧ 𝜒 ∧ 𝜏) ↔ ((𝜑 ∧ 𝜒) ∧ 𝜏)) | |
7 | df-3an 1033 | . 2 ⊢ ((𝜓 ∧ 𝜃 ∧ 𝜂) ↔ ((𝜓 ∧ 𝜃) ∧ 𝜂)) | |
8 | 5, 6, 7 | 3bitr4i 291 | 1 ⊢ ((𝜑 ∧ 𝜒 ∧ 𝜏) ↔ (𝜓 ∧ 𝜃 ∧ 𝜂)) |
Colors of variables: wff setvar class |
Syntax hints: ↔ wb 195 ∧ wa 383 ∧ w3a 1031 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 |
This theorem depends on definitions: df-bi 196 df-an 385 df-3an 1033 |
This theorem is referenced by: 3anbi1i 1246 3anbi2i 1247 3anbi3i 1248 syl3anb 1361 an33rean 1438 cadnot 1545 f13dfv 6430 axgroth5 9525 axgroth6 9529 cotr2g 13563 cbvprod 14484 isstruct 15705 pmtr3ncomlem1 17716 opprsubg 18459 nb3grapr 25982 cusgra3v 25993 wwlknfi 26266 frgra3v 26529 or3dir 28692 unelldsys 29548 bnj156 30050 bnj206 30053 bnj887 30089 bnj121 30194 bnj130 30198 bnj605 30231 bnj581 30232 brpprod3b 31164 brapply 31215 brrestrict 31226 dfrdg4 31228 brsegle 31385 tendoset 35065 issubgr 40495 nbgrsym 40591 nb3grpr 40610 usgr2pthlem 40969 umgr2adedgwlk 41152 umgrwwlks2on 41161 elwspths2spth 41171 31wlkdlem8 41334 frgr3v 41445 |
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