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| Mirrors > Home > MPE Home > Th. List > Mathboxes > dplti | Structured version Visualization version GIF version | ||
| Description: Comparing a decimal expansions with the next higher integer. (Contributed by Thierry Arnoux, 16-Dec-2021.) |
| Ref | Expression |
|---|---|
| dplti.a | ⊢ 𝐴 ∈ ℕ0 |
| dplti.b | ⊢ 𝐵 ∈ ℝ+ |
| dplti.c | ⊢ 𝐶 ∈ ℕ0 |
| dplti.1 | ⊢ 𝐵 < ;10 |
| dplti.2 | ⊢ (𝐴 + 1) = 𝐶 |
| Ref | Expression |
|---|---|
| dplti | ⊢ (𝐴.𝐵) < 𝐶 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | dplti.a | . . . 4 ⊢ 𝐴 ∈ ℕ0 | |
| 2 | dplti.b | . . . . 5 ⊢ 𝐵 ∈ ℝ+ | |
| 3 | rpre 12942 | . . . . 5 ⊢ (𝐵 ∈ ℝ+ → 𝐵 ∈ ℝ) | |
| 4 | 2, 3 | ax-mp 5 | . . . 4 ⊢ 𝐵 ∈ ℝ |
| 5 | 1, 4 | dpval2 32967 | . . 3 ⊢ (𝐴.𝐵) = (𝐴 + (𝐵 / ;10)) |
| 6 | dplti.1 | . . . . 5 ⊢ 𝐵 < ;10 | |
| 7 | 10re 12654 | . . . . . . . 8 ⊢ ;10 ∈ ℝ | |
| 8 | 10pos 12652 | . . . . . . . 8 ⊢ 0 < ;10 | |
| 9 | 7, 8 | pm3.2i 470 | . . . . . . 7 ⊢ (;10 ∈ ℝ ∧ 0 < ;10) |
| 10 | elrp 12935 | . . . . . . 7 ⊢ (;10 ∈ ℝ+ ↔ (;10 ∈ ℝ ∧ 0 < ;10)) | |
| 11 | 9, 10 | mpbir 231 | . . . . . 6 ⊢ ;10 ∈ ℝ+ |
| 12 | divlt1lt 13004 | . . . . . 6 ⊢ ((𝐵 ∈ ℝ ∧ ;10 ∈ ℝ+) → ((𝐵 / ;10) < 1 ↔ 𝐵 < ;10)) | |
| 13 | 4, 11, 12 | mp2an 693 | . . . . 5 ⊢ ((𝐵 / ;10) < 1 ↔ 𝐵 < ;10) |
| 14 | 6, 13 | mpbir 231 | . . . 4 ⊢ (𝐵 / ;10) < 1 |
| 15 | 0re 11137 | . . . . . . 7 ⊢ 0 ∈ ℝ | |
| 16 | 15, 8 | gtneii 11249 | . . . . . 6 ⊢ ;10 ≠ 0 |
| 17 | 4, 7, 16 | redivcli 11913 | . . . . 5 ⊢ (𝐵 / ;10) ∈ ℝ |
| 18 | 1re 11135 | . . . . 5 ⊢ 1 ∈ ℝ | |
| 19 | nn0ssre 12432 | . . . . . 6 ⊢ ℕ0 ⊆ ℝ | |
| 20 | 19, 1 | sselii 3919 | . . . . 5 ⊢ 𝐴 ∈ ℝ |
| 21 | 17, 18, 20 | ltadd2i 11268 | . . . 4 ⊢ ((𝐵 / ;10) < 1 ↔ (𝐴 + (𝐵 / ;10)) < (𝐴 + 1)) |
| 22 | 14, 21 | mpbi 230 | . . 3 ⊢ (𝐴 + (𝐵 / ;10)) < (𝐴 + 1) |
| 23 | 5, 22 | eqbrtri 5107 | . 2 ⊢ (𝐴.𝐵) < (𝐴 + 1) |
| 24 | dplti.2 | . 2 ⊢ (𝐴 + 1) = 𝐶 | |
| 25 | 23, 24 | breqtri 5111 | 1 ⊢ (𝐴.𝐵) < 𝐶 |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 206 ∧ wa 395 = wceq 1542 ∈ wcel 2114 class class class wbr 5086 (class class class)co 7360 ℝcr 11028 0cc0 11029 1c1 11030 + caddc 11032 < clt 11170 / cdiv 11798 ℕ0cn0 12428 ;cdc 12635 ℝ+crp 12933 .cdp 32962 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5231 ax-nul 5241 ax-pow 5302 ax-pr 5370 ax-un 7682 ax-resscn 11086 ax-1cn 11087 ax-icn 11088 ax-addcl 11089 ax-addrcl 11090 ax-mulcl 11091 ax-mulrcl 11092 ax-mulcom 11093 ax-addass 11094 ax-mulass 11095 ax-distr 11096 ax-i2m1 11097 ax-1ne0 11098 ax-1rid 11099 ax-rnegex 11100 ax-rrecex 11101 ax-cnre 11102 ax-pre-lttri 11103 ax-pre-lttrn 11104 ax-pre-ltadd 11105 ax-pre-mulgt0 11106 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rmo 3343 df-reu 3344 df-rab 3391 df-v 3432 df-sbc 3730 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-iun 4936 df-br 5087 df-opab 5149 df-mpt 5168 df-tr 5194 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 df-pred 6259 df-ord 6320 df-on 6321 df-lim 6322 df-suc 6323 df-iota 6448 df-fun 6494 df-fn 6495 df-f 6496 df-f1 6497 df-fo 6498 df-f1o 6499 df-fv 6500 df-riota 7317 df-ov 7363 df-oprab 7364 df-mpo 7365 df-om 7811 df-2nd 7936 df-frecs 8224 df-wrecs 8255 df-recs 8304 df-rdg 8342 df-er 8636 df-en 8887 df-dom 8888 df-sdom 8889 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 df-sub 11370 df-neg 11371 df-div 11799 df-nn 12166 df-2 12235 df-3 12236 df-4 12237 df-5 12238 df-6 12239 df-7 12240 df-8 12241 df-9 12242 df-n0 12429 df-dec 12636 df-rp 12934 df-dp2 32946 df-dp 32963 |
| This theorem is referenced by: hgt750lem 34811 |
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