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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 1004 | . 2 ⊢ ((𝜓 ∧ 𝜃 ∧ 𝜂) ↔ ((𝜓 ∧ 𝜃) ∧ 𝜂)) | |
| 7 | df-3an 1004 | . 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 1002 |
| 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 1004 |
| This theorem is referenced by: 3anbi12d 1347 3anbi13d 1348 3anbi23d 1349 limeq 4468 smoeq 6442 tfrlemi1 6484 tfr1onlemaccex 6500 tfrcllemaccex 6513 ereq1 6695 updjud 7260 ctssdclemr 7290 tapeq1 7449 tapeq2 7450 elinp 7672 sup3exmid 9115 iccshftr 10202 iccshftl 10204 iccdil 10206 icccntr 10208 fzaddel 10267 elfzomelpfzo 10449 seq3f1olemstep 10748 seq3f1olemp 10749 wrdl1s1 11178 sumeq1 11881 summodclem2 11908 summodc 11909 zsumdc 11910 prodmodclem2 12103 prodmodc 12104 divalglemnn 12444 divalglemeunn 12447 divalglemeuneg 12449 dfgcd2 12550 pythagtriplem18 12819 pythagtriplem19 12820 ctiunct 13026 ssomct 13031 isstruct2im 13057 isstruct2r 13058 ptex 13312 imasmnd2 13500 imasgrp2 13662 isrngd 13931 imasrng 13934 isringd 14019 imasring 14042 subrngpropd 14195 issubrg3 14226 islmod 14270 lmodlema 14271 islmodd 14272 lmodprop2d 14327 fiinopn 14693 lmfval 14882 upxp 14961 ivthdich 15342 2irrexpqap 15667 wksfval 16063 iswlk 16064 isclwwlk 16132 3dom 16411 dceqnconst 16488 dcapnconst 16489 |
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