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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 477 | . . 3 ⊢ (𝜑 → ((𝜓 ∧ 𝜃) ↔ (𝜒 ∧ 𝜏))) |
| 4 | bi3d.3 | . . 3 ⊢ (𝜑 → (𝜂 ↔ 𝜁)) | |
| 5 | 3, 4 | anbi12d 477 | . 2 ⊢ (𝜑 → (((𝜓 ∧ 𝜃) ∧ 𝜂) ↔ ((𝜒 ∧ 𝜏) ∧ 𝜁))) |
| 6 | df-3an 1011 | . 2 ⊢ ((𝜓 ∧ 𝜃 ∧ 𝜂) ↔ ((𝜓 ∧ 𝜃) ∧ 𝜂)) | |
| 7 | df-3an 1011 | . 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 |
| This proof depends on syntax axioms: → wi 4 ∧ wa 104 ↔ wb 105 ∧ w3a 1009 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 |
| This proof depends on definitions: df-bi 117 df-3an 1011 |
| This theorem is used by: 3anbi12d 1354 3anbi13d 1355 3anbi23d 1356 limeq 4524 smoeq 6565 tfrlemi1 6607 tfr1onlemaccex 6623 tfrcllemaccex 6636 ereq1 6818 updjud 7428 ctssdclemr 7458 tapeq1 7624 tapeq2 7625 elinp 7847 sup3exmid 9295 iccshftr 10413 iccshftl 10415 iccdil 10417 icccntr 10419 fzaddel 10482 elfzomelpfzo 10666 seq3f1olemstep 10972 seq3f1olemp 10973 wrdl1s1 11420 sumeq1 12146 summodclem2 12174 summodc 12175 zsumdc 12176 prodmodclem2 12369 prodmodc 12370 divalglemnn 12710 divalglemeunn 12713 divalglemeuneg 12715 dfgcd2 12816 pythagtriplem18 13089 pythagtriplem19 13090 ctiunct 13389 ssomct 13394 isstruct2im 13420 isstruct2r 13421 ptex 13677 imasmnd2 13818 imasgrp2 13972 isrngd 14359 imasrng 14362 isringd 14453 imasring 14478 subrngpropd 14633 issubrg3 14664 islmod 14736 lmodlema 14737 islmodd 14738 lmodprop2d 14794 fiinopn 15230 lmfval 15419 upxp 15498 ivthdich 15879 2irrexpqap 16214 issubgr 16703 wksfval 16768 iswlk 16769 isclwwlk 16840 clwwlkn1loopb 16866 s2elclwwlknon2 16882 3dom 17223 dceqnconst 17317 dcapnconst 17318 |
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