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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 1007 | . 2 ⊢ ((𝜓 ∧ 𝜃 ∧ 𝜂) ↔ ((𝜓 ∧ 𝜃) ∧ 𝜂)) | |
| 7 | df-3an 1007 | . 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 1005 |
| 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 1007 |
| This theorem is referenced by: 3anbi12d 1350 3anbi13d 1351 3anbi23d 1352 limeq 4480 smoeq 6499 tfrlemi1 6541 tfr1onlemaccex 6557 tfrcllemaccex 6570 ereq1 6752 updjud 7324 ctssdclemr 7354 tapeq1 7514 tapeq2 7515 elinp 7737 sup3exmid 9179 iccshftr 10273 iccshftl 10275 iccdil 10277 icccntr 10279 fzaddel 10339 elfzomelpfzo 10522 seq3f1olemstep 10822 seq3f1olemp 10823 wrdl1s1 11256 sumeq1 11978 summodclem2 12006 summodc 12007 zsumdc 12008 prodmodclem2 12201 prodmodc 12202 divalglemnn 12542 divalglemeunn 12545 divalglemeuneg 12547 dfgcd2 12648 pythagtriplem18 12917 pythagtriplem19 12918 ctiunct 13124 ssomct 13129 isstruct2im 13155 isstruct2r 13156 ptex 13410 imasmnd2 13598 imasgrp2 13760 isrngd 14030 imasrng 14033 isringd 14118 imasring 14141 subrngpropd 14294 issubrg3 14325 islmod 14370 lmodlema 14371 islmodd 14372 lmodprop2d 14427 fiinopn 14798 lmfval 14987 upxp 15066 ivthdich 15447 2irrexpqap 15772 issubgr 16181 wksfval 16246 iswlk 16247 isclwwlk 16318 clwwlkn1loopb 16344 s2elclwwlknon2 16360 3dom 16691 dceqnconst 16776 dcapnconst 16777 |
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