| Mathbox for Thierry Arnoux |
< Previous
Next >
Nearby theorems |
||
| Mirrors > Home > MPE Home > Th. List > Mathboxes > threehalves | Structured version Visualization version GIF version | ||
| Description: Example theorem demonstrating decimal expansions. (Contributed by Thierry Arnoux, 27-Dec-2021.) |
| Ref | Expression |
|---|---|
| threehalves | ⊢ (3 / 2) = (1.5) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3re 12252 | . . . . 5 ⊢ 3 ∈ ℝ | |
| 2 | 2re 12246 | . . . . 5 ⊢ 2 ∈ ℝ | |
| 3 | 2ne0 12276 | . . . . 5 ⊢ 2 ≠ 0 | |
| 4 | 1, 2, 3 | redivcli 11913 | . . . 4 ⊢ (3 / 2) ∈ ℝ |
| 5 | 4 | recni 11150 | . . 3 ⊢ (3 / 2) ∈ ℂ |
| 6 | 1nn0 12444 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
| 7 | 5re 12259 | . . . . 5 ⊢ 5 ∈ ℝ | |
| 8 | dpcl 32965 | . . . . 5 ⊢ ((1 ∈ ℕ0 ∧ 5 ∈ ℝ) → (1.5) ∈ ℝ) | |
| 9 | 6, 7, 8 | mp2an 693 | . . . 4 ⊢ (1.5) ∈ ℝ |
| 10 | 9 | recni 11150 | . . 3 ⊢ (1.5) ∈ ℂ |
| 11 | 2cnne0 12377 | . . 3 ⊢ (2 ∈ ℂ ∧ 2 ≠ 0) | |
| 12 | 5, 10, 11 | 3pm3.2i 1341 | . 2 ⊢ ((3 / 2) ∈ ℂ ∧ (1.5) ∈ ℂ ∧ (2 ∈ ℂ ∧ 2 ≠ 0)) |
| 13 | 5nn0 12448 | . . . . 5 ⊢ 5 ∈ ℕ0 | |
| 14 | 3nn0 12446 | . . . . 5 ⊢ 3 ∈ ℕ0 | |
| 15 | 0nn0 12443 | . . . . 5 ⊢ 0 ∈ ℕ0 | |
| 16 | eqid 2737 | . . . . . 6 ⊢ ;15 = ;15 | |
| 17 | df-2 12235 | . . . . . . . 8 ⊢ 2 = (1 + 1) | |
| 18 | 17 | oveq1i 7370 | . . . . . . 7 ⊢ (2 + 1) = ((1 + 1) + 1) |
| 19 | 2p1e3 12309 | . . . . . . 7 ⊢ (2 + 1) = 3 | |
| 20 | 18, 19 | eqtr3i 2762 | . . . . . 6 ⊢ ((1 + 1) + 1) = 3 |
| 21 | 5p5e10 12706 | . . . . . 6 ⊢ (5 + 5) = ;10 | |
| 22 | 6, 13, 6, 13, 16, 16, 20, 15, 21 | decaddc 12690 | . . . . 5 ⊢ (;15 + ;15) = ;30 |
| 23 | 6, 13, 6, 13, 14, 15, 22 | dpadd 32985 | . . . 4 ⊢ ((1.5) + (1.5)) = (3.0) |
| 24 | 14 | dp0u 32975 | . . . 4 ⊢ (3.0) = 3 |
| 25 | 23, 24 | eqtri 2760 | . . 3 ⊢ ((1.5) + (1.5)) = 3 |
| 26 | 10 | times2i 12306 | . . 3 ⊢ ((1.5) · 2) = ((1.5) + (1.5)) |
| 27 | 1 | recni 11150 | . . . 4 ⊢ 3 ∈ ℂ |
| 28 | 11 | simpli 483 | . . . 4 ⊢ 2 ∈ ℂ |
| 29 | 27, 28, 3 | divcan1i 11890 | . . 3 ⊢ ((3 / 2) · 2) = 3 |
| 30 | 25, 26, 29 | 3eqtr4ri 2771 | . 2 ⊢ ((3 / 2) · 2) = ((1.5) · 2) |
| 31 | mulcan2 11779 | . . 3 ⊢ (((3 / 2) ∈ ℂ ∧ (1.5) ∈ ℂ ∧ (2 ∈ ℂ ∧ 2 ≠ 0)) → (((3 / 2) · 2) = ((1.5) · 2) ↔ (3 / 2) = (1.5))) | |
| 32 | 31 | biimpa 476 | . 2 ⊢ ((((3 / 2) ∈ ℂ ∧ (1.5) ∈ ℂ ∧ (2 ∈ ℂ ∧ 2 ≠ 0)) ∧ ((3 / 2) · 2) = ((1.5) · 2)) → (3 / 2) = (1.5)) |
| 33 | 12, 30, 32 | mp2an 693 | 1 ⊢ (3 / 2) = (1.5) |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 395 ∧ w3a 1087 = wceq 1542 ∈ wcel 2114 ≠ wne 2933 (class class class)co 7360 ℂcc 11027 ℝcr 11028 0cc0 11029 1c1 11030 + caddc 11032 · cmul 11034 / cdiv 11798 2c2 12227 3c3 12228 5c5 12230 ℕ0cn0 12428 ;cdc 12635 .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-dp2 32946 df-dp 32963 |
| This theorem is referenced by: (None) |
| Copyright terms: Public domain | W3C validator |