| 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 13020 | . . . . . 6 ⊢ ℝ+ ⊆ ℝ | |
| 2 | dp2lt.b | . . . . . 6 ⊢ 𝐵 ∈ ℝ+ | |
| 3 | 1, 2 | sselii 3942 | . . . . 5 ⊢ 𝐵 ∈ ℝ |
| 4 | 10re 12730 | . . . . 5 ⊢ ;10 ∈ ℝ | |
| 5 | 0re 11206 | . . . . . 6 ⊢ 0 ∈ ℝ | |
| 6 | 10pos 12728 | . . . . . 6 ⊢ 0 < ;10 | |
| 7 | 5, 6 | gtneii 11318 | . . . . 5 ⊢ ;10 ≠ 0 |
| 8 | redivcl 11930 | . . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ ;10 ∈ ℝ ∧ ;10 ≠ 0) → (𝐵 / ;10) ∈ ℝ) | |
| 9 | 3, 4, 7, 8 | mp3an 1487 | . . . 4 ⊢ (𝐵 / ;10) ∈ ℝ |
| 10 | dp2lt.c | . . . . . 6 ⊢ 𝐶 ∈ ℝ+ | |
| 11 | 1, 10 | sselii 3942 | . . . . 5 ⊢ 𝐶 ∈ ℝ |
| 12 | redivcl 11930 | . . . . 5 ⊢ ((𝐶 ∈ ℝ ∧ ;10 ∈ ℝ ∧ ;10 ≠ 0) → (𝐶 / ;10) ∈ ℝ) | |
| 13 | 11, 4, 7, 12 | mp3an 1487 | . . . 4 ⊢ (𝐶 / ;10) ∈ ℝ |
| 14 | dp2lt.a | . . . . 5 ⊢ 𝐴 ∈ ℕ0 | |
| 15 | 14 | nn0rei 12511 | . . . 4 ⊢ 𝐴 ∈ ℝ |
| 16 | 9, 13, 15 | 3pm3.2i 1356 | . . 3 ⊢ ((𝐵 / ;10) ∈ ℝ ∧ (𝐶 / ;10) ∈ ℝ ∧ 𝐴 ∈ ℝ) |
| 17 | dp2lt.l | . . . 4 ⊢ 𝐵 < 𝐶 | |
| 18 | 4, 6 | pm3.2i 475 | . . . . 5 ⊢ (;10 ∈ ℝ ∧ 0 < ;10) |
| 19 | ltdiv1 12075 | . . . . 5 ⊢ ((𝐵 ∈ ℝ ∧ 𝐶 ∈ ℝ ∧ (;10 ∈ ℝ ∧ 0 < ;10)) → (𝐵 < 𝐶 ↔ (𝐵 / ;10) < (𝐶 / ;10))) | |
| 20 | 3, 11, 18, 19 | mp3an 1487 | . . . 4 ⊢ (𝐵 < 𝐶 ↔ (𝐵 / ;10) < (𝐶 / ;10)) |
| 21 | 17, 20 | mpbi 233 | . . 3 ⊢ (𝐵 / ;10) < (𝐶 / ;10) |
| 22 | axltadd 11279 | . . . 4 ⊢ (((𝐵 / ;10) ∈ ℝ ∧ (𝐶 / ;10) ∈ ℝ ∧ 𝐴 ∈ ℝ) → ((𝐵 / ;10) < (𝐶 / ;10) → (𝐴 + (𝐵 / ;10)) < (𝐴 + (𝐶 / ;10)))) | |
| 23 | 22 | imp 411 | . . 3 ⊢ ((((𝐵 / ;10) ∈ ℝ ∧ (𝐶 / ;10) ∈ ℝ ∧ 𝐴 ∈ ℝ) ∧ (𝐵 / ;10) < (𝐶 / ;10)) → (𝐴 + (𝐵 / ;10)) < (𝐴 + (𝐶 / ;10))) |
| 24 | 16, 21, 23 | mp2an 704 | . 2 ⊢ (𝐴 + (𝐵 / ;10)) < (𝐴 + (𝐶 / ;10)) |
| 25 | df-dp2 33128 | . 2 ⊢ _𝐴𝐵 = (𝐴 + (𝐵 / ;10)) | |
| 26 | df-dp2 33128 | . 2 ⊢ _𝐴𝐶 = (𝐴 + (𝐶 / ;10)) | |
| 27 | 24, 25, 26 | 3brtr4i 5142 | 1 ⊢ _𝐴𝐵 < _𝐴𝐶 |
| Colors of variables: wff setvar class |
| Syntax hints: ↔ wb 209 ∧ wa 400 ∧ w3a 1101 ∈ wcel 2149 ≠ wne 2964 class class class wbr 5110 (class class class)co 7408 ℝcr 11095 0cc0 11096 1c1 11097 + caddc 11099 < clt 11239 / cdiv 11867 ℕ0cn0 12500 ;cdc 12707 ℝ+crp 13012 _cdp2 33127 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5258 ax-nul 5268 ax-pow 5334 ax-pr 5402 ax-un 7730 ax-resscn 11153 ax-1cn 11154 ax-icn 11155 ax-addcl 11156 ax-addrcl 11157 ax-mulcl 11158 ax-mulrcl 11159 ax-mulcom 11160 ax-addass 11161 ax-mulass 11162 ax-distr 11163 ax-i2m1 11164 ax-1ne0 11165 ax-1rid 11166 ax-rnegex 11167 ax-rrecex 11168 ax-cnre 11169 ax-pre-lttri 11170 ax-pre-lttrn 11171 ax-pre-ltadd 11172 ax-pre-mulgt0 11173 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-rmo 3376 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-tr 5220 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6299 df-ord 6360 df-on 6361 df-lim 6362 df-suc 6363 df-iota 6489 df-fun 6535 df-fn 6536 df-f 6537 df-f1 6538 df-fo 6539 df-f1o 6540 df-fv 6541 df-riota 7365 df-ov 7411 df-oprab 7412 df-mpo 7413 df-om 7859 df-2nd 7983 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-er 8690 df-en 8940 df-dom 8941 df-sdom 8942 df-pnf 11241 df-mnf 11242 df-xr 11243 df-ltxr 11244 df-le 11245 df-sub 11439 df-neg 11440 df-div 11868 df-nn 12230 df-2 12299 df-3 12300 df-4 12301 df-5 12302 df-6 12303 df-7 12304 df-8 12305 df-9 12306 df-n0 12501 df-dec 12708 df-rp 13013 df-dp2 33128 |
| This theorem is referenced by: dplt 33160 hgt750lem2 34980 |
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