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Mirrors > Home > MPE Home > Th. List > dyadval | Structured version Visualization version GIF version |
Description: Value of the dyadic rational function 𝐹. (Contributed by Mario Carneiro, 26-Mar-2015.) |
Ref | Expression |
---|---|
dyadmbl.1 | ⊢ 𝐹 = (𝑥 ∈ ℤ, 𝑦 ∈ ℕ0 ↦ 〈(𝑥 / (2↑𝑦)), ((𝑥 + 1) / (2↑𝑦))〉) |
Ref | Expression |
---|---|
dyadval | ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℕ0) → (𝐴𝐹𝐵) = 〈(𝐴 / (2↑𝐵)), ((𝐴 + 1) / (2↑𝐵))〉) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | id 22 | . . . 4 ⊢ (𝑥 = 𝐴 → 𝑥 = 𝐴) | |
2 | oveq2 6557 | . . . 4 ⊢ (𝑦 = 𝐵 → (2↑𝑦) = (2↑𝐵)) | |
3 | 1, 2 | oveqan12d 6568 | . . 3 ⊢ ((𝑥 = 𝐴 ∧ 𝑦 = 𝐵) → (𝑥 / (2↑𝑦)) = (𝐴 / (2↑𝐵))) |
4 | oveq1 6556 | . . . 4 ⊢ (𝑥 = 𝐴 → (𝑥 + 1) = (𝐴 + 1)) | |
5 | 4, 2 | oveqan12d 6568 | . . 3 ⊢ ((𝑥 = 𝐴 ∧ 𝑦 = 𝐵) → ((𝑥 + 1) / (2↑𝑦)) = ((𝐴 + 1) / (2↑𝐵))) |
6 | 3, 5 | opeq12d 4348 | . 2 ⊢ ((𝑥 = 𝐴 ∧ 𝑦 = 𝐵) → 〈(𝑥 / (2↑𝑦)), ((𝑥 + 1) / (2↑𝑦))〉 = 〈(𝐴 / (2↑𝐵)), ((𝐴 + 1) / (2↑𝐵))〉) |
7 | dyadmbl.1 | . 2 ⊢ 𝐹 = (𝑥 ∈ ℤ, 𝑦 ∈ ℕ0 ↦ 〈(𝑥 / (2↑𝑦)), ((𝑥 + 1) / (2↑𝑦))〉) | |
8 | opex 4859 | . 2 ⊢ 〈(𝐴 / (2↑𝐵)), ((𝐴 + 1) / (2↑𝐵))〉 ∈ V | |
9 | 6, 7, 8 | ovmpt2a 6689 | 1 ⊢ ((𝐴 ∈ ℤ ∧ 𝐵 ∈ ℕ0) → (𝐴𝐹𝐵) = 〈(𝐴 / (2↑𝐵)), ((𝐴 + 1) / (2↑𝐵))〉) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 383 = wceq 1475 ∈ wcel 1977 〈cop 4131 (class class class)co 6549 ↦ cmpt2 6551 1c1 9816 + caddc 9818 / cdiv 10563 2c2 10947 ℕ0cn0 11169 ℤcz 11254 ↑cexp 12722 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pr 4833 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ral 2901 df-rex 2902 df-rab 2905 df-v 3175 df-sbc 3403 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-sn 4126 df-pr 4128 df-op 4132 df-uni 4373 df-br 4584 df-opab 4644 df-id 4953 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-iota 5768 df-fun 5806 df-fv 5812 df-ov 6552 df-oprab 6553 df-mpt2 6554 |
This theorem is referenced by: dyadovol 23167 dyadss 23168 dyaddisjlem 23169 dyadmaxlem 23171 opnmbllem 23175 opnmbllem0 32615 |
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