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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 12322 | . . . . 5 ⊢ 3 ∈ ℝ | |
| 2 | 2re 12316 | . . . . 5 ⊢ 2 ∈ ℝ | |
| 3 | 2ne0 12348 | . . . . 5 ⊢ 2 ≠ 0 | |
| 4 | 1, 2, 3 | redivcli 11983 | . . . 4 ⊢ (3 / 2) ∈ ℝ |
| 5 | 4 | recni 11224 | . . 3 ⊢ (3 / 2) ∈ ℂ |
| 6 | 1nn0 12521 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
| 7 | 5re 12329 | . . . . 5 ⊢ 5 ∈ ℝ | |
| 8 | dpcl 33188 | . . . . 5 ⊢ ((1 ∈ ℕ0 ∧ 5 ∈ ℝ) → (1.5) ∈ ℝ) | |
| 9 | 6, 7, 8 | mp2an 704 | . . . 4 ⊢ (1.5) ∈ ℝ |
| 10 | 9 | recni 11224 | . . 3 ⊢ (1.5) ∈ ℂ |
| 11 | 2cnne0 12454 | . . 3 ⊢ (2 ∈ ℂ ∧ 2 ≠ 0) | |
| 12 | 5, 10, 11 | 3pm3.2i 1358 | . 2 ⊢ ((3 / 2) ∈ ℂ ∧ (1.5) ∈ ℂ ∧ (2 ∈ ℂ ∧ 2 ≠ 0)) |
| 13 | 5nn0 12525 | . . . . 5 ⊢ 5 ∈ ℕ0 | |
| 14 | 3nn0 12523 | . . . . 5 ⊢ 3 ∈ ℕ0 | |
| 15 | 0nn0 12520 | . . . . 5 ⊢ 0 ∈ ℕ0 | |
| 16 | eqid 2763 | . . . . . 6 ⊢ ;15 = ;15 | |
| 17 | df-2 12304 | . . . . . . . 8 ⊢ 2 = (1 + 1) | |
| 18 | 17 | oveq1i 7422 | . . . . . . 7 ⊢ (2 + 1) = ((1 + 1) + 1) |
| 19 | 2p1e3 12383 | . . . . . . 7 ⊢ (2 + 1) = 3 | |
| 20 | 18, 19 | eqtr3i 2788 | . . . . . 6 ⊢ ((1 + 1) + 1) = 3 |
| 21 | 5p5e10 12788 | . . . . . 6 ⊢ (5 + 5) = ;10 | |
| 22 | 6, 13, 6, 13, 16, 16, 20, 15, 21 | decaddc 12772 | . . . . 5 ⊢ (;15 + ;15) = ;30 |
| 23 | 6, 13, 6, 13, 14, 15, 22 | dpadd 33208 | . . . 4 ⊢ ((1.5) + (1.5)) = (3.0) |
| 24 | 14 | dp0u 33198 | . . . 4 ⊢ (3.0) = 3 |
| 25 | 23, 24 | eqtri 2786 | . . 3 ⊢ ((1.5) + (1.5)) = 3 |
| 26 | 10 | times2i 12380 | . . 3 ⊢ ((1.5) · 2) = ((1.5) + (1.5)) |
| 27 | 1 | recni 11224 | . . . 4 ⊢ 3 ∈ ℂ |
| 28 | 11 | simpli 488 | . . . 4 ⊢ 2 ∈ ℂ |
| 29 | 27, 28, 3 | divcan1i 11960 | . . 3 ⊢ ((3 / 2) · 2) = 3 |
| 30 | 25, 26, 29 | 3eqtr4ri 2797 | . 2 ⊢ ((3 / 2) · 2) = ((1.5) · 2) |
| 31 | mulcan2 11853 | . . 3 ⊢ (((3 / 2) ∈ ℂ ∧ (1.5) ∈ ℂ ∧ (2 ∈ ℂ ∧ 2 ≠ 0)) → (((3 / 2) · 2) = ((1.5) · 2) ↔ (3 / 2) = (1.5))) | |
| 32 | 31 | biimpa 481 | . 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 704 | 1 ⊢ (3 / 2) = (1.5) |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 400 ∧ w3a 1103 = wceq 1570 ∈ wcel 2143 ≠ wne 2958 (class class class)co 7412 ℂcc 11099 ℝcr 11100 0cc0 11101 1c1 11102 + caddc 11104 · cmul 11106 / cdiv 11872 2c2 12296 3c3 12297 5c5 12299 ℕ0cn0 12505 ;cdc 12712 .cdp 33185 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-10 2176 ax-11 2192 ax-12 2213 ax-ext 2735 ax-sep 5258 ax-nul 5270 ax-pow 5338 ax-pr 5406 ax-un 7734 ax-resscn 11158 ax-1cn 11159 ax-icn 11160 ax-addcl 11161 ax-addrcl 11162 ax-mulcl 11163 ax-mulrcl 11164 ax-mulcom 11165 ax-addass 11166 ax-mulass 11167 ax-distr 11168 ax-i2m1 11169 ax-1ne0 11170 ax-1rid 11171 ax-rnegex 11172 ax-rrecex 11173 ax-cnre 11174 ax-pre-lttri 11175 ax-pre-lttrn 11176 ax-pre-ltadd 11177 ax-pre-mulgt0 11178 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1104 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-nf 1814 df-sb 2097 df-mo 2567 df-eu 2597 df-clab 2742 df-cleq 2755 df-clel 2838 df-nfc 2912 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rmo 3369 df-reu 3370 df-rab 3417 df-v 3457 df-sbc 3746 df-csb 3855 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-pss 3926 df-nul 4288 df-if 4489 df-pw 4565 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-tr 5220 df-id 5558 df-eprel 5563 df-po 5571 df-so 5572 df-fr 5616 df-we 5618 df-xp 5669 df-rel 5670 df-cnv 5671 df-co 5672 df-dm 5673 df-rn 5674 df-res 5675 df-ima 5676 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-riota 7369 df-ov 7415 df-oprab 7416 df-mpo 7417 df-om 7864 df-2nd 7988 df-frecs 8279 df-wrecs 8310 df-recs 8359 df-rdg 8398 df-er 8695 df-en 8945 df-dom 8946 df-sdom 8947 df-pnf 11246 df-mnf 11247 df-xr 11248 df-ltxr 11249 df-le 11250 df-sub 11444 df-neg 11445 df-div 11873 df-nn 12235 df-2 12304 df-3 12305 df-4 12306 df-5 12307 df-6 12308 df-7 12309 df-8 12310 df-9 12311 df-n0 12506 df-dec 12713 df-dp2 33169 df-dp 33186 |
| This theorem is referenced by: (None) |
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