| 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 12914 | . . . . . 6 ⊢ ℝ+ ⊆ ℝ | |
| 2 | dp2lt.b | . . . . . 6 ⊢ 𝐵 ∈ ℝ+ | |
| 3 | 1, 2 | sselii 3919 | . . . . 5 ⊢ 𝐵 ∈ ℝ |
| 4 | 10re 12627 | . . . . 5 ⊢ ;10 ∈ ℝ | |
| 5 | 0re 11135 | . . . . . 6 ⊢ 0 ∈ ℝ | |
| 6 | 10pos 12625 | . . . . . 6 ⊢ 0 < ;10 | |
| 7 | 5, 6 | gtneii 11246 | . . . . 5 ⊢ ;10 ≠ 0 |
| 8 | redivcl 11861 | . . . . 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 3919 | . . . . 5 ⊢ 𝐶 ∈ ℝ |
| 12 | redivcl 11861 | . . . . 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 12413 | . . . 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 12007 | . . . . 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 11207 | . . . 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 32936 | . 2 ⊢ _𝐴𝐵 = (𝐴 + (𝐵 / ;10)) | |
| 26 | df-dp2 32936 | . 2 ⊢ _𝐴𝐶 = (𝐴 + (𝐶 / ;10)) | |
| 27 | 24, 25, 26 | 3brtr4i 5116 | 1 ⊢ _𝐴𝐵 < _𝐴𝐶 |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 206 ∧ wa 395 ∧ w3a 1087 ∈ wcel 2114 ≠ wne 2933 class class class wbr 5086 (class class class)co 7358 ℝcr 11026 0cc0 11027 1c1 11028 + caddc 11030 < clt 11167 / cdiv 11795 ℕ0cn0 12402 ;cdc 12608 ℝ+crp 12906 _cdp2 32935 |
| 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 5300 ax-pr 5368 ax-un 7680 ax-resscn 11084 ax-1cn 11085 ax-icn 11086 ax-addcl 11087 ax-addrcl 11088 ax-mulcl 11089 ax-mulrcl 11090 ax-mulcom 11091 ax-addass 11092 ax-mulass 11093 ax-distr 11094 ax-i2m1 11095 ax-1ne0 11096 ax-1rid 11097 ax-rnegex 11098 ax-rrecex 11099 ax-cnre 11100 ax-pre-lttri 11101 ax-pre-lttrn 11102 ax-pre-ltadd 11103 ax-pre-mulgt0 11104 |
| 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 5517 df-eprel 5522 df-po 5530 df-so 5531 df-fr 5575 df-we 5577 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-pred 6257 df-ord 6318 df-on 6319 df-lim 6320 df-suc 6321 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-riota 7315 df-ov 7361 df-oprab 7362 df-mpo 7363 df-om 7809 df-2nd 7934 df-frecs 8222 df-wrecs 8253 df-recs 8302 df-rdg 8340 df-er 8634 df-en 8885 df-dom 8886 df-sdom 8887 df-pnf 11169 df-mnf 11170 df-xr 11171 df-ltxr 11172 df-le 11173 df-sub 11367 df-neg 11368 df-div 11796 df-nn 12147 df-2 12209 df-3 12210 df-4 12211 df-5 12212 df-6 12213 df-7 12214 df-8 12215 df-9 12216 df-n0 12403 df-dec 12609 df-rp 12907 df-dp2 32936 |
| This theorem is referenced by: dplt 32968 hgt750lem2 34802 |
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