| Mathbox for Thierry Arnoux |
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| Mirrors > Home > MPE Home > Th. List > Mathboxes > dp2lt | Structured version Visualization version GIF version | ||
| Description: Comparing two decimal fractions (equal unit places). (Contributed by Thierry Arnoux, 16-Dec-2021.) |
| Ref | Expression |
|---|---|
| dp2lt.a | ⊢ 𝐴 ∈ ℕ0 |
| dp2lt.b | ⊢ 𝐵 ∈ ℝ+ |
| dp2lt.c | ⊢ 𝐶 ∈ ℝ+ |
| dp2lt.l | ⊢ 𝐵 < 𝐶 |
| Ref | Expression |
|---|---|
| dp2lt | ⊢ _𝐴𝐵 < _𝐴𝐶 |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | rpssre 12950 | . . . . . 6 ⊢ ℝ+ ⊆ ℝ | |
| 2 | dp2lt.b | . . . . . 6 ⊢ 𝐵 ∈ ℝ+ | |
| 3 | 1, 2 | sselii 3918 | . . . . 5 ⊢ 𝐵 ∈ ℝ |
| 4 | 10re 12663 | . . . . 5 ⊢ ;10 ∈ ℝ | |
| 5 | 0re 11146 | . . . . . 6 ⊢ 0 ∈ ℝ | |
| 6 | 10pos 12661 | . . . . . 6 ⊢ 0 < ;10 | |
| 7 | 5, 6 | gtneii 11258 | . . . . 5 ⊢ ;10 ≠ 0 |
| 8 | redivcl 11874 | . . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ ;10 ∈ ℝ ∧ ;10 ≠ 0) → (𝐵 / ;10) ∈ ℝ) | |
| 9 | 3, 4, 7, 8 | mp3an 1464 | . . . 4 ⊢ (𝐵 / ;10) ∈ ℝ |
| 10 | dp2lt.c | . . . . . 6 ⊢ 𝐶 ∈ ℝ+ | |
| 11 | 1, 10 | sselii 3918 | . . . . 5 ⊢ 𝐶 ∈ ℝ |
| 12 | redivcl 11874 | . . . . 5 ⊢ ((𝐶 ∈ ℝ ∧ ;10 ∈ ℝ ∧ ;10 ≠ 0) → (𝐶 / ;10) ∈ ℝ) | |
| 13 | 11, 4, 7, 12 | mp3an 1464 | . . . 4 ⊢ (𝐶 / ;10) ∈ ℝ |
| 14 | dp2lt.a | . . . . 5 ⊢ 𝐴 ∈ ℕ0 | |
| 15 | 14 | nn0rei 12448 | . . . 4 ⊢ 𝐴 ∈ ℝ |
| 16 | 9, 13, 15 | 3pm3.2i 1341 | . . 3 ⊢ ((𝐵 / ;10) ∈ ℝ ∧ (𝐶 / ;10) ∈ ℝ ∧ 𝐴 ∈ ℝ) |
| 17 | dp2lt.l | . . . 4 ⊢ 𝐵 < 𝐶 | |
| 18 | 4, 6 | pm3.2i 470 | . . . . 5 ⊢ (;10 ∈ ℝ ∧ 0 < ;10) |
| 19 | ltdiv1 12020 | . . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ ∧ (;10 ∈ ℝ ∧ 0 < ;10)) → (𝐵 < 𝐶 ↔ (𝐵 / ;10) < (𝐶 / ;10))) | |
| 20 | 3, 11, 18, 19 | mp3an 1464 | . . . 4 ⊢ (𝐵 < 𝐶 ↔ (𝐵 / ;10) < (𝐶 / ;10)) |
| 21 | 17, 20 | mpbi 230 | . . 3 ⊢ (𝐵 / ;10) < (𝐶 / ;10) |
| 22 | axltadd 11219 | . . . 4 ⊢ (((𝐵 / ;10) ∈ ℝ ∧ (𝐶 / ;10) ∈ ℝ ∧ 𝐴 ∈ ℝ) → ((𝐵 / ;10) < (𝐶 / ;10) → (𝐴 + (𝐵 / ;10)) < (𝐴 + (𝐶 / ;10)))) | |
| 23 | 22 | imp 406 | . . 3 ⊢ ((((𝐵 / ;10) ∈ ℝ ∧ (𝐶 / ;10) ∈ ℝ ∧ 𝐴 ∈ ℝ) ∧ (𝐵 / ;10) < (𝐶 / ;10)) → (𝐴 + (𝐵 / ;10)) < (𝐴 + (𝐶 / ;10))) |
| 24 | 16, 21, 23 | mp2an 693 | . 2 ⊢ (𝐴 + (𝐵 / ;10)) < (𝐴 + (𝐶 / ;10)) |
| 25 | df-dp2 32931 | . 2 ⊢ _𝐴𝐵 = (𝐴 + (𝐵 / ;10)) | |
| 26 | df-dp2 32931 | . 2 ⊢ _𝐴𝐶 = (𝐴 + (𝐶 / ;10)) | |
| 27 | 24, 25, 26 | 3brtr4i 5115 | 1 ⊢ _𝐴𝐵 < _𝐴𝐶 |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 206 ∧ wa 395 ∧ w3a 1087 ∈ wcel 2114 ≠ wne 2932 class class class wbr 5085 (class class class)co 7367 ℝcr 11037 0cc0 11038 1c1 11039 + caddc 11041 < clt 11179 / cdiv 11807 ℕ0cn0 12437 ;cdc 12644 ℝ+crp 12942 _cdp2 32930 |
| 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 2708 ax-sep 5231 ax-nul 5241 ax-pow 5307 ax-pr 5375 ax-un 7689 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 |
| 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 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3062 df-rmo 3342 df-reu 3343 df-rab 3390 df-v 3431 df-sbc 3729 df-csb 3838 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-pss 3909 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-iun 4935 df-br 5086 df-opab 5148 df-mpt 5167 df-tr 5193 df-id 5526 df-eprel 5531 df-po 5539 df-so 5540 df-fr 5584 df-we 5586 df-xp 5637 df-rel 5638 df-cnv 5639 df-co 5640 df-dm 5641 df-rn 5642 df-res 5643 df-ima 5644 df-pred 6265 df-ord 6326 df-on 6327 df-lim 6328 df-suc 6329 df-iota 6454 df-fun 6500 df-fn 6501 df-f 6502 df-f1 6503 df-fo 6504 df-f1o 6505 df-fv 6506 df-riota 7324 df-ov 7370 df-oprab 7371 df-mpo 7372 df-om 7818 df-2nd 7943 df-frecs 8231 df-wrecs 8262 df-recs 8311 df-rdg 8349 df-er 8643 df-en 8894 df-dom 8895 df-sdom 8896 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-le 11185 df-sub 11379 df-neg 11380 df-div 11808 df-nn 12175 df-2 12244 df-3 12245 df-4 12246 df-5 12247 df-6 12248 df-7 12249 df-8 12250 df-9 12251 df-n0 12438 df-dec 12645 df-rp 12943 df-dp2 32931 |
| This theorem is referenced by: dplt 32963 hgt750lem2 34796 |
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