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| Mirrors > Home > ILE Home > Th. List > bitsfval | GIF version | ||
| Description: Expand the definition of the bits of an integer. (Contributed by Mario Carneiro, 5-Sep-2016.) |
| Ref | Expression |
|---|---|
| bitsfval | ⊢ (𝑁 ∈ ℤ → (bits‘𝑁) = {𝑚 ∈ ℕ0 ∣ ¬ 2 ∥ (⌊‘(𝑁 / (2↑𝑚)))}) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | fvoveq1 5945 | . . . . 5 ⊢ (𝑛 = 𝑁 → (⌊‘(𝑛 / (2↑𝑚))) = (⌊‘(𝑁 / (2↑𝑚)))) | |
| 2 | 1 | breq2d 4045 | . . . 4 ⊢ (𝑛 = 𝑁 → (2 ∥ (⌊‘(𝑛 / (2↑𝑚))) ↔ 2 ∥ (⌊‘(𝑁 / (2↑𝑚))))) |
| 3 | 2 | notbid 668 | . . 3 ⊢ (𝑛 = 𝑁 → (¬ 2 ∥ (⌊‘(𝑛 / (2↑𝑚))) ↔ ¬ 2 ∥ (⌊‘(𝑁 / (2↑𝑚))))) |
| 4 | 3 | rabbidv 2752 | . 2 ⊢ (𝑛 = 𝑁 → {𝑚 ∈ ℕ0 ∣ ¬ 2 ∥ (⌊‘(𝑛 / (2↑𝑚)))} = {𝑚 ∈ ℕ0 ∣ ¬ 2 ∥ (⌊‘(𝑁 / (2↑𝑚)))}) |
| 5 | df-bits 12106 | . 2 ⊢ bits = (𝑛 ∈ ℤ ↦ {𝑚 ∈ ℕ0 ∣ ¬ 2 ∥ (⌊‘(𝑛 / (2↑𝑚)))}) | |
| 6 | nn0ex 9255 | . . 3 ⊢ ℕ0 ∈ V | |
| 7 | 6 | rabex 4177 | . 2 ⊢ {𝑚 ∈ ℕ0 ∣ ¬ 2 ∥ (⌊‘(𝑁 / (2↑𝑚)))} ∈ V |
| 8 | 4, 5, 7 | fvmpt 5638 | 1 ⊢ (𝑁 ∈ ℤ → (bits‘𝑁) = {𝑚 ∈ ℕ0 ∣ ¬ 2 ∥ (⌊‘(𝑁 / (2↑𝑚)))}) |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 3 → wi 4 = wceq 1364 ∈ wcel 2167 {crab 2479 class class class wbr 4033 ‘cfv 5258 (class class class)co 5922 / cdiv 8699 2c2 9041 ℕ0cn0 9249 ℤcz 9326 ⌊cfl 10358 ↑cexp 10630 ∥ cdvds 11952 bitscbits 12105 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 615 ax-in2 616 ax-io 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-13 2169 ax-14 2170 ax-ext 2178 ax-sep 4151 ax-pow 4207 ax-pr 4242 ax-un 4468 ax-cnex 7970 ax-resscn 7971 ax-1cn 7972 ax-1re 7973 ax-icn 7974 ax-addcl 7975 ax-addrcl 7976 ax-mulcl 7977 ax-i2m1 7984 |
| This theorem depends on definitions: df-bi 117 df-3an 982 df-tru 1367 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ral 2480 df-rex 2481 df-rab 2484 df-v 2765 df-sbc 2990 df-un 3161 df-in 3163 df-ss 3170 df-pw 3607 df-sn 3628 df-pr 3629 df-op 3631 df-uni 3840 df-int 3875 df-br 4034 df-opab 4095 df-mpt 4096 df-id 4328 df-xp 4669 df-rel 4670 df-cnv 4671 df-co 4672 df-dm 4673 df-iota 5219 df-fun 5260 df-fv 5266 df-ov 5925 df-inn 8991 df-n0 9250 df-bits 12106 |
| This theorem is referenced by: bitsval 12108 |
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