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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 4498 smoeq 6521 tfrlemi1 6563 tfr1onlemaccex 6579 tfrcllemaccex 6592 ereq1 6774 updjud 7373 ctssdclemr 7403 tapeq1 7566 tapeq2 7567 elinp 7789 sup3exmid 9231 iccshftr 10327 iccshftl 10329 iccdil 10331 icccntr 10333 fzaddel 10393 elfzomelpfzo 10576 seq3f1olemstep 10876 seq3f1olemp 10877 wrdl1s1 11318 sumeq1 12040 summodclem2 12068 summodc 12069 zsumdc 12070 prodmodclem2 12263 prodmodc 12264 divalglemnn 12604 divalglemeunn 12607 divalglemeuneg 12609 dfgcd2 12710 pythagtriplem18 12979 pythagtriplem19 12980 ctiunct 13191 ssomct 13196 isstruct2im 13222 isstruct2r 13223 ptex 13477 imasmnd2 13665 imasgrp2 13827 isrngd 14097 imasrng 14100 isringd 14185 imasring 14208 subrngpropd 14361 issubrg3 14392 islmod 14439 lmodlema 14440 islmodd 14441 lmodprop2d 14496 fiinopn 14869 lmfval 15058 upxp 15137 ivthdich 15518 2irrexpqap 15843 issubgr 16252 wksfval 16317 iswlk 16318 isclwwlk 16389 clwwlkn1loopb 16415 s2elclwwlknon2 16431 3dom 16762 dceqnconst 16846 dcapnconst 16847 |
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