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| 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 12259 | . . . . 5 ⊢ 3 ∈ ℝ | |
| 2 | 2re 12253 | . . . . 5 ⊢ 2 ∈ ℝ | |
| 3 | 2ne0 12283 | . . . . 5 ⊢ 2 ≠ 0 | |
| 4 | 1, 2, 3 | redivcli 11920 | . . . 4 ⊢ (3 / 2) ∈ ℝ |
| 5 | 4 | recni 11157 | . . 3 ⊢ (3 / 2) ∈ ℂ |
| 6 | 1nn0 12451 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
| 7 | 5re 12266 | . . . . 5 ⊢ 5 ∈ ℝ | |
| 8 | dpcl 32976 | . . . . 5 ⊢ ((1 ∈ ℕ0 ∧ 5 ∈ ℝ) → (1.5) ∈ ℝ) | |
| 9 | 6, 7, 8 | mp2an 698 | . . . 4 ⊢ (1.5) ∈ ℝ |
| 10 | 9 | recni 11157 | . . 3 ⊢ (1.5) ∈ ℂ |
| 11 | 2cnne0 12384 | . . 3 ⊢ (2 ∈ ℂ ∧ 2 ≠ 0) | |
| 12 | 5, 10, 11 | 3pm3.2i 1346 | . 2 ⊢ ((3 / 2) ∈ ℂ ∧ (1.5) ∈ ℂ ∧ (2 ∈ ℂ ∧ 2 ≠ 0)) |
| 13 | 5nn0 12455 | . . . . 5 ⊢ 5 ∈ ℕ0 | |
| 14 | 3nn0 12453 | . . . . 5 ⊢ 3 ∈ ℕ0 | |
| 15 | 0nn0 12450 | . . . . 5 ⊢ 0 ∈ ℕ0 | |
| 16 | eqid 2740 | . . . . . 6 ⊢ ;15 = ;15 | |
| 17 | df-2 12242 | . . . . . . . 8 ⊢ 2 = (1 + 1) | |
| 18 | 17 | oveq1i 7373 | . . . . . . 7 ⊢ (2 + 1) = ((1 + 1) + 1) |
| 19 | 2p1e3 12316 | . . . . . . 7 ⊢ (2 + 1) = 3 | |
| 20 | 18, 19 | eqtr3i 2765 | . . . . . 6 ⊢ ((1 + 1) + 1) = 3 |
| 21 | 5p5e10 12713 | . . . . . 6 ⊢ (5 + 5) = ;10 | |
| 22 | 6, 13, 6, 13, 16, 16, 20, 15, 21 | decaddc 12697 | . . . . 5 ⊢ (;15 + ;15) = ;30 |
| 23 | 6, 13, 6, 13, 14, 15, 22 | dpadd 32996 | . . . 4 ⊢ ((1.5) + (1.5)) = (3.0) |
| 24 | 14 | dp0u 32986 | . . . 4 ⊢ (3.0) = 3 |
| 25 | 23, 24 | eqtri 2763 | . . 3 ⊢ ((1.5) + (1.5)) = 3 |
| 26 | 10 | times2i 12313 | . . 3 ⊢ ((1.5) · 2) = ((1.5) + (1.5)) |
| 27 | 1 | recni 11157 | . . . 4 ⊢ 3 ∈ ℂ |
| 28 | 11 | simpli 484 | . . . 4 ⊢ 2 ∈ ℂ |
| 29 | 27, 28, 3 | divcan1i 11897 | . . 3 ⊢ ((3 / 2) · 2) = 3 |
| 30 | 25, 26, 29 | 3eqtr4ri 2774 | . 2 ⊢ ((3 / 2) · 2) = ((1.5) · 2) |
| 31 | mulcan2 11786 | . . 3 ⊢ (((3 / 2) ∈ ℂ ∧ (1.5) ∈ ℂ ∧ (2 ∈ ℂ ∧ 2 ≠ 0)) → (((3 / 2) · 2) = ((1.5) · 2) ↔ (3 / 2) = (1.5))) | |
| 32 | 31 | biimpa 477 | . 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 698 | 1 ⊢ (3 / 2) = (1.5) |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 396 ∧ w3a 1092 = wceq 1547 ∈ wcel 2119 ≠ wne 2935 (class class class)co 7363 ℂcc 11034 ℝcr 11035 0cc0 11036 1c1 11037 + caddc 11039 · cmul 11041 / cdiv 11805 2c2 12234 3c3 12235 5c5 12237 ℕ0cn0 12435 ;cdc 12642 .cdp 32973 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-10 2152 ax-11 2168 ax-12 2189 ax-ext 2712 ax-sep 5225 ax-nul 5235 ax-pow 5301 ax-pr 5369 ax-un 7685 ax-resscn 11093 ax-1cn 11094 ax-icn 11095 ax-addcl 11096 ax-addrcl 11097 ax-mulcl 11098 ax-mulrcl 11099 ax-mulcom 11100 ax-addass 11101 ax-mulass 11102 ax-distr 11103 ax-i2m1 11104 ax-1ne0 11105 ax-1rid 11106 ax-rnegex 11107 ax-rrecex 11108 ax-cnre 11109 ax-pre-lttri 11110 ax-pre-lttrn 11111 ax-pre-ltadd 11112 ax-pre-mulgt0 11113 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3or 1093 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-nf 1791 df-sb 2074 df-mo 2543 df-eu 2573 df-clab 2719 df-cleq 2732 df-clel 2815 df-nfc 2889 df-ne 2936 df-nel 3040 df-ral 3055 df-rex 3065 df-rmo 3345 df-reu 3346 df-rab 3393 df-v 3434 df-sbc 3731 df-csb 3839 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-pss 3910 df-nul 4269 df-if 4462 df-pw 4538 df-sn 4563 df-pr 4565 df-op 4569 df-uni 4846 df-iun 4930 df-br 5080 df-opab 5142 df-mpt 5161 df-tr 5187 df-id 5520 df-eprel 5525 df-po 5533 df-so 5534 df-fr 5578 df-we 5580 df-xp 5631 df-rel 5632 df-cnv 5633 df-co 5634 df-dm 5635 df-rn 5636 df-res 5637 df-ima 5638 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 7320 df-ov 7366 df-oprab 7367 df-mpo 7368 df-om 7814 df-2nd 7939 df-frecs 8228 df-wrecs 8259 df-recs 8308 df-rdg 8346 df-er 8640 df-en 8891 df-dom 8892 df-sdom 8893 df-pnf 11179 df-mnf 11180 df-xr 11181 df-ltxr 11182 df-le 11183 df-sub 11377 df-neg 11378 df-div 11806 df-nn 12173 df-2 12242 df-3 12243 df-4 12244 df-5 12245 df-6 12246 df-7 12247 df-8 12248 df-9 12249 df-n0 12436 df-dec 12643 df-dp2 32957 df-dp 32974 |
| This theorem is referenced by: (None) |
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