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Mirrors > Home > ILE Home > Th. List > decbin2 | GIF version |
Description: Decompose base 4 into base 2. (Contributed by Mario Carneiro, 18-Feb-2014.) |
Ref | Expression |
---|---|
decbin.1 | ⊢ 𝐴 ∈ ℕ0 |
Ref | Expression |
---|---|
decbin2 | ⊢ ((4 · 𝐴) + 2) = (2 · ((2 · 𝐴) + 1)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2t1e2 8880 | . . 3 ⊢ (2 · 1) = 2 | |
2 | 1 | oveq2i 5785 | . 2 ⊢ ((2 · (2 · 𝐴)) + (2 · 1)) = ((2 · (2 · 𝐴)) + 2) |
3 | 2cn 8798 | . . 3 ⊢ 2 ∈ ℂ | |
4 | decbin.1 | . . . . 5 ⊢ 𝐴 ∈ ℕ0 | |
5 | 4 | nn0cni 8996 | . . . 4 ⊢ 𝐴 ∈ ℂ |
6 | 3, 5 | mulcli 7778 | . . 3 ⊢ (2 · 𝐴) ∈ ℂ |
7 | ax-1cn 7720 | . . 3 ⊢ 1 ∈ ℂ | |
8 | 3, 6, 7 | adddii 7783 | . 2 ⊢ (2 · ((2 · 𝐴) + 1)) = ((2 · (2 · 𝐴)) + (2 · 1)) |
9 | 4 | decbin0 9328 | . . 3 ⊢ (4 · 𝐴) = (2 · (2 · 𝐴)) |
10 | 9 | oveq1i 5784 | . 2 ⊢ ((4 · 𝐴) + 2) = ((2 · (2 · 𝐴)) + 2) |
11 | 2, 8, 10 | 3eqtr4ri 2171 | 1 ⊢ ((4 · 𝐴) + 2) = (2 · ((2 · 𝐴) + 1)) |
Colors of variables: wff set class |
Syntax hints: = wceq 1331 ∈ wcel 1480 (class class class)co 5774 1c1 7628 + caddc 7630 · cmul 7632 2c2 8778 4c4 8780 ℕ0cn0 8984 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-sep 4046 ax-cnex 7718 ax-resscn 7719 ax-1cn 7720 ax-1re 7721 ax-icn 7722 ax-addcl 7723 ax-addrcl 7724 ax-mulcl 7725 ax-mulcom 7728 ax-addass 7729 ax-mulass 7730 ax-distr 7731 ax-1rid 7734 ax-rnegex 7736 ax-cnre 7738 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ral 2421 df-rex 2422 df-v 2688 df-un 3075 df-in 3077 df-ss 3084 df-sn 3533 df-pr 3534 df-op 3536 df-uni 3737 df-int 3772 df-br 3930 df-iota 5088 df-fv 5131 df-ov 5777 df-inn 8728 df-2 8786 df-3 8787 df-4 8788 df-n0 8985 |
This theorem is referenced by: decbin3 9330 |
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