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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 4472 smoeq 6451 tfrlemi1 6493 tfr1onlemaccex 6509 tfrcllemaccex 6522 ereq1 6704 updjud 7272 ctssdclemr 7302 tapeq1 7461 tapeq2 7462 elinp 7684 sup3exmid 9127 iccshftr 10219 iccshftl 10221 iccdil 10223 icccntr 10225 fzaddel 10284 elfzomelpfzo 10466 seq3f1olemstep 10766 seq3f1olemp 10767 wrdl1s1 11197 sumeq1 11906 summodclem2 11933 summodc 11934 zsumdc 11935 prodmodclem2 12128 prodmodc 12129 divalglemnn 12469 divalglemeunn 12472 divalglemeuneg 12474 dfgcd2 12575 pythagtriplem18 12844 pythagtriplem19 12845 ctiunct 13051 ssomct 13056 isstruct2im 13082 isstruct2r 13083 ptex 13337 imasmnd2 13525 imasgrp2 13687 isrngd 13956 imasrng 13959 isringd 14044 imasring 14067 subrngpropd 14220 issubrg3 14251 islmod 14295 lmodlema 14296 islmodd 14297 lmodprop2d 14352 fiinopn 14718 lmfval 14907 upxp 14986 ivthdich 15367 2irrexpqap 15692 wksfval 16119 iswlk 16120 isclwwlk 16189 clwwlkn1loopb 16215 s2elclwwlknon2 16231 3dom 16523 dceqnconst 16600 dcapnconst 16601 |
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