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| Mirrors > Home > ILE Home > Th. List > 3anbi123d | GIF version | ||
| Description: Deduction joining 3 equivalences to form equivalence of conjunctions. (Contributed by NM, 22-Apr-1994.) |
| Ref | Expression |
|---|---|
| bi3d.1 | ⊢ (𝜑 → (𝜓 ↔ 𝜒)) |
| bi3d.2 | ⊢ (𝜑 → (𝜃 ↔ 𝜏)) |
| bi3d.3 | ⊢ (𝜑 → (𝜂 ↔ 𝜁)) |
| Ref | Expression |
|---|---|
| 3anbi123d | ⊢ (𝜑 → ((𝜓 ∧ 𝜃 ∧ 𝜂) ↔ (𝜒 ∧ 𝜏 ∧ 𝜁))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | bi3d.1 | . . . 4 ⊢ (𝜑 → (𝜓 ↔ 𝜒)) | |
| 2 | bi3d.2 | . . . 4 ⊢ (𝜑 → (𝜃 ↔ 𝜏)) | |
| 3 | 1, 2 | anbi12d 473 | . . 3 ⊢ (𝜑 → ((𝜓 ∧ 𝜃) ↔ (𝜒 ∧ 𝜏))) |
| 4 | bi3d.3 | . . 3 ⊢ (𝜑 → (𝜂 ↔ 𝜁)) | |
| 5 | 3, 4 | anbi12d 473 | . 2 ⊢ (𝜑 → (((𝜓 ∧ 𝜃) ∧ 𝜂) ↔ ((𝜒 ∧ 𝜏) ∧ 𝜁))) |
| 6 | df-3an 1006 | . 2 ⊢ ((𝜓 ∧ 𝜃 ∧ 𝜂) ↔ ((𝜓 ∧ 𝜃) ∧ 𝜂)) | |
| 7 | df-3an 1006 | . 2 ⊢ ((𝜒 ∧ 𝜏 ∧ 𝜁) ↔ ((𝜒 ∧ 𝜏) ∧ 𝜁)) | |
| 8 | 5, 6, 7 | 3bitr4g 223 | 1 ⊢ (𝜑 → ((𝜓 ∧ 𝜃 ∧ 𝜂) ↔ (𝜒 ∧ 𝜏 ∧ 𝜁))) |
| Colors of variables: wff set class |
| Syntax hints: → wi 4 ∧ wa 104 ↔ wb 105 ∧ w3a 1004 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 |
| This theorem is referenced by: 3anbi12d 1349 3anbi13d 1350 3anbi23d 1351 limeq 4474 smoeq 6456 tfrlemi1 6498 tfr1onlemaccex 6514 tfrcllemaccex 6527 ereq1 6709 updjud 7281 ctssdclemr 7311 tapeq1 7471 tapeq2 7472 elinp 7694 sup3exmid 9137 iccshftr 10229 iccshftl 10231 iccdil 10233 icccntr 10235 fzaddel 10294 elfzomelpfzo 10477 seq3f1olemstep 10777 seq3f1olemp 10778 wrdl1s1 11211 sumeq1 11933 summodclem2 11961 summodc 11962 zsumdc 11963 prodmodclem2 12156 prodmodc 12157 divalglemnn 12497 divalglemeunn 12500 divalglemeuneg 12502 dfgcd2 12603 pythagtriplem18 12872 pythagtriplem19 12873 ctiunct 13079 ssomct 13084 isstruct2im 13110 isstruct2r 13111 ptex 13365 imasmnd2 13553 imasgrp2 13715 isrngd 13985 imasrng 13988 isringd 14073 imasring 14096 subrngpropd 14249 issubrg3 14280 islmod 14324 lmodlema 14325 islmodd 14326 lmodprop2d 14381 fiinopn 14747 lmfval 14936 upxp 15015 ivthdich 15396 2irrexpqap 15721 issubgr 16127 wksfval 16192 iswlk 16193 isclwwlk 16264 clwwlkn1loopb 16290 s2elclwwlknon2 16306 3dom 16638 dceqnconst 16716 dcapnconst 16717 |
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