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| Mirrors > Home > MPE Home > Th. List > Mathboxes > dpval2 | Structured version Visualization version GIF version | ||
| Description: Value of the decimal point construct. (Contributed by Thierry Arnoux, 16-Dec-2021.) |
| Ref | Expression |
|---|---|
| dpval2.a | ⊢ 𝐴 ∈ ℕ0 |
| dpval2.b | ⊢ 𝐵 ∈ ℝ |
| Ref | Expression |
|---|---|
| dpval2 | ⊢ (𝐴.𝐵) = (𝐴 + (𝐵 / ;10)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dpval2.a | . . 3 ⊢ 𝐴 ∈ ℕ0 | |
| 2 | dpval2.b | . . 3 ⊢ 𝐵 ∈ ℝ | |
| 3 | dpval 33343 | . . 3 ⊢ ((𝐴 ∈ ℕ0 ∧ 𝐵 ∈ ℝ) → (𝐴.𝐵) = _𝐴𝐵) | |
| 4 | 1, 2, 3 | mp2an 705 | . 2 ⊢ (𝐴.𝐵) = _𝐴𝐵 |
| 5 | df-dp2 33325 | . 2 ⊢ _𝐴𝐵 = (𝐴 + (𝐵 / ;10)) | |
| 6 | 4, 5 | eqtri 2785 | 1 ⊢ (𝐴.𝐵) = (𝐴 + (𝐵 / ;10)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: = wceq 1570 ∈ wcel 2145 (class class class)co 7417 ℝcr 11127 0cc0 11128 1c1 11129 + caddc 11131 / cdiv 11899 ℕ0cn0 12532 ;cdc 12740 _cdp2 33324 .cdp 33341 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-10 2178 ax-11 2194 ax-12 2215 ax-ext 2734 ax-sep 5255 ax-nul 5267 ax-pr 5402 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-nf 1817 df-sb 2100 df-mo 2566 df-eu 2596 df-clab 2741 df-cleq 2754 df-clel 2837 df-nfc 2911 df-ne 2958 df-ral 3079 df-rex 3089 df-rab 3415 df-v 3455 df-sbc 3743 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4283 df-if 4486 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-br 5108 df-opab 5172 df-id 5554 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-iota 6493 df-fun 6539 df-fv 6545 df-ov 7420 df-oprab 7421 df-mpo 7422 df-dp2 33325 df-dp 33342 |
| This theorem is used by: dpval3 33347 dpmul10 33348 dpmul100 33350 dp3mul10 33351 dplti 33358 dpgti 33359 dpadd2 33363 |
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