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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 6455 tfrlemi1 6497 tfr1onlemaccex 6513 tfrcllemaccex 6526 ereq1 6708 updjud 7280 ctssdclemr 7310 tapeq1 7470 tapeq2 7471 elinp 7693 sup3exmid 9136 iccshftr 10228 iccshftl 10230 iccdil 10232 icccntr 10234 fzaddel 10293 elfzomelpfzo 10475 seq3f1olemstep 10775 seq3f1olemp 10776 wrdl1s1 11206 sumeq1 11915 summodclem2 11942 summodc 11943 zsumdc 11944 prodmodclem2 12137 prodmodc 12138 divalglemnn 12478 divalglemeunn 12481 divalglemeuneg 12483 dfgcd2 12584 pythagtriplem18 12853 pythagtriplem19 12854 ctiunct 13060 ssomct 13065 isstruct2im 13091 isstruct2r 13092 ptex 13346 imasmnd2 13534 imasgrp2 13696 isrngd 13965 imasrng 13968 isringd 14053 imasring 14076 subrngpropd 14229 issubrg3 14260 islmod 14304 lmodlema 14305 islmodd 14306 lmodprop2d 14361 fiinopn 14727 lmfval 14916 upxp 14995 ivthdich 15376 2irrexpqap 15701 issubgr 16107 wksfval 16172 iswlk 16173 isclwwlk 16244 clwwlkn1loopb 16270 s2elclwwlknon2 16286 3dom 16587 dceqnconst 16664 dcapnconst 16665 |
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