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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 11208 sumeq1 11917 summodclem2 11945 summodc 11946 zsumdc 11947 prodmodclem2 12140 prodmodc 12141 divalglemnn 12481 divalglemeunn 12484 divalglemeuneg 12486 dfgcd2 12587 pythagtriplem18 12856 pythagtriplem19 12857 ctiunct 13063 ssomct 13068 isstruct2im 13094 isstruct2r 13095 ptex 13349 imasmnd2 13537 imasgrp2 13699 isrngd 13969 imasrng 13972 isringd 14057 imasring 14080 subrngpropd 14233 issubrg3 14264 islmod 14308 lmodlema 14309 islmodd 14310 lmodprop2d 14365 fiinopn 14731 lmfval 14920 upxp 14999 ivthdich 15380 2irrexpqap 15705 issubgr 16111 wksfval 16176 iswlk 16177 isclwwlk 16248 clwwlkn1loopb 16274 s2elclwwlknon2 16290 3dom 16608 dceqnconst 16685 dcapnconst 16686 |
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