| Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > ILE Home > Th. List > bitsval | GIF version | ||
| Description: Expand the definition of the bits of an integer. (Contributed by Mario Carneiro, 5-Sep-2016.) |
| Ref | Expression |
|---|---|
| bitsval | ⊢ (𝑀 ∈ (bits‘𝑁) ↔ (𝑁 ∈ ℤ ∧ 𝑀 ∈ ℕ0 ∧ ¬ 2 ∥ (⌊‘(𝑁 / (2↑𝑀))))) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-bits 12106 | . . . 4 ⊢ bits = (𝑛 ∈ ℤ ↦ {𝑚 ∈ ℕ0 ∣ ¬ 2 ∥ (⌊‘(𝑛 / (2↑𝑚)))}) | |
| 2 | 1 | mptrcl 5644 | . . 3 ⊢ (𝑀 ∈ (bits‘𝑁) → 𝑁 ∈ ℤ) |
| 3 | bitsfval 12107 | . . . . 5 ⊢ (𝑁 ∈ ℤ → (bits‘𝑁) = {𝑚 ∈ ℕ0 ∣ ¬ 2 ∥ (⌊‘(𝑁 / (2↑𝑚)))}) | |
| 4 | 3 | eleq2d 2266 | . . . 4 ⊢ (𝑁 ∈ ℤ → (𝑀 ∈ (bits‘𝑁) ↔ 𝑀 ∈ {𝑚 ∈ ℕ0 ∣ ¬ 2 ∥ (⌊‘(𝑁 / (2↑𝑚)))})) |
| 5 | oveq2 5930 | . . . . . . . . 9 ⊢ (𝑚 = 𝑀 → (2↑𝑚) = (2↑𝑀)) | |
| 6 | 5 | oveq2d 5938 | . . . . . . . 8 ⊢ (𝑚 = 𝑀 → (𝑁 / (2↑𝑚)) = (𝑁 / (2↑𝑀))) |
| 7 | 6 | fveq2d 5562 | . . . . . . 7 ⊢ (𝑚 = 𝑀 → (⌊‘(𝑁 / (2↑𝑚))) = (⌊‘(𝑁 / (2↑𝑀)))) |
| 8 | 7 | breq2d 4045 | . . . . . 6 ⊢ (𝑚 = 𝑀 → (2 ∥ (⌊‘(𝑁 / (2↑𝑚))) ↔ 2 ∥ (⌊‘(𝑁 / (2↑𝑀))))) |
| 9 | 8 | notbid 668 | . . . . 5 ⊢ (𝑚 = 𝑀 → (¬ 2 ∥ (⌊‘(𝑁 / (2↑𝑚))) ↔ ¬ 2 ∥ (⌊‘(𝑁 / (2↑𝑀))))) |
| 10 | 9 | elrab 2920 | . . . 4 ⊢ (𝑀 ∈ {𝑚 ∈ ℕ0 ∣ ¬ 2 ∥ (⌊‘(𝑁 / (2↑𝑚)))} ↔ (𝑀 ∈ ℕ0 ∧ ¬ 2 ∥ (⌊‘(𝑁 / (2↑𝑀))))) |
| 11 | 4, 10 | bitrdi 196 | . . 3 ⊢ (𝑁 ∈ ℤ → (𝑀 ∈ (bits‘𝑁) ↔ (𝑀 ∈ ℕ0 ∧ ¬ 2 ∥ (⌊‘(𝑁 / (2↑𝑀)))))) |
| 12 | 2, 11 | biadanii 613 | . 2 ⊢ (𝑀 ∈ (bits‘𝑁) ↔ (𝑁 ∈ ℤ ∧ (𝑀 ∈ ℕ0 ∧ ¬ 2 ∥ (⌊‘(𝑁 / (2↑𝑀)))))) |
| 13 | 3anass 984 | . 2 ⊢ ((𝑁 ∈ ℤ ∧ 𝑀 ∈ ℕ0 ∧ ¬ 2 ∥ (⌊‘(𝑁 / (2↑𝑀)))) ↔ (𝑁 ∈ ℤ ∧ (𝑀 ∈ ℕ0 ∧ ¬ 2 ∥ (⌊‘(𝑁 / (2↑𝑀)))))) | |
| 14 | 12, 13 | bitr4i 187 | 1 ⊢ (𝑀 ∈ (bits‘𝑁) ↔ (𝑁 ∈ ℤ ∧ 𝑀 ∈ ℕ0 ∧ ¬ 2 ∥ (⌊‘(𝑁 / (2↑𝑀))))) |
| Colors of variables: wff set class |
| Syntax hints: ¬ wn 3 ∧ wa 104 ↔ wb 105 ∧ w3a 980 = 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-rn 4674 df-res 4675 df-ima 4676 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: bitsval2 12109 bitsss 12110 bitsfzo 12119 |
| Copyright terms: Public domain | W3C validator |