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 11720 | . . . . 5 ⊢ 3 ∈ ℝ | |
2 | 2re 11714 | . . . . 5 ⊢ 2 ∈ ℝ | |
3 | 2ne0 11744 | . . . . 5 ⊢ 2 ≠ 0 | |
4 | 1, 2, 3 | redivcli 11409 | . . . 4 ⊢ (3 / 2) ∈ ℝ |
5 | 4 | recni 10657 | . . 3 ⊢ (3 / 2) ∈ ℂ |
6 | 1nn0 11916 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
7 | 5re 11727 | . . . . 5 ⊢ 5 ∈ ℝ | |
8 | dpcl 30569 | . . . . 5 ⊢ ((1 ∈ ℕ0 ∧ 5 ∈ ℝ) → (1.5) ∈ ℝ) | |
9 | 6, 7, 8 | mp2an 690 | . . . 4 ⊢ (1.5) ∈ ℝ |
10 | 9 | recni 10657 | . . 3 ⊢ (1.5) ∈ ℂ |
11 | 2cnne0 11850 | . . 3 ⊢ (2 ∈ ℂ ∧ 2 ≠ 0) | |
12 | 5, 10, 11 | 3pm3.2i 1335 | . 2 ⊢ ((3 / 2) ∈ ℂ ∧ (1.5) ∈ ℂ ∧ (2 ∈ ℂ ∧ 2 ≠ 0)) |
13 | 5nn0 11920 | . . . . 5 ⊢ 5 ∈ ℕ0 | |
14 | 3nn0 11918 | . . . . 5 ⊢ 3 ∈ ℕ0 | |
15 | 0nn0 11915 | . . . . 5 ⊢ 0 ∈ ℕ0 | |
16 | eqid 2823 | . . . . . 6 ⊢ ;15 = ;15 | |
17 | df-2 11703 | . . . . . . . 8 ⊢ 2 = (1 + 1) | |
18 | 17 | oveq1i 7168 | . . . . . . 7 ⊢ (2 + 1) = ((1 + 1) + 1) |
19 | 2p1e3 11782 | . . . . . . 7 ⊢ (2 + 1) = 3 | |
20 | 18, 19 | eqtr3i 2848 | . . . . . 6 ⊢ ((1 + 1) + 1) = 3 |
21 | 5p5e10 12172 | . . . . . 6 ⊢ (5 + 5) = ;10 | |
22 | 6, 13, 6, 13, 16, 16, 20, 15, 21 | decaddc 12156 | . . . . 5 ⊢ (;15 + ;15) = ;30 |
23 | 6, 13, 6, 13, 14, 15, 22 | dpadd 30589 | . . . 4 ⊢ ((1.5) + (1.5)) = (3.0) |
24 | 14 | dp0u 30579 | . . . 4 ⊢ (3.0) = 3 |
25 | 23, 24 | eqtri 2846 | . . 3 ⊢ ((1.5) + (1.5)) = 3 |
26 | 10 | times2i 11779 | . . 3 ⊢ ((1.5) · 2) = ((1.5) + (1.5)) |
27 | 1 | recni 10657 | . . . 4 ⊢ 3 ∈ ℂ |
28 | 11 | simpli 486 | . . . 4 ⊢ 2 ∈ ℂ |
29 | 27, 28, 3 | divcan1i 11386 | . . 3 ⊢ ((3 / 2) · 2) = 3 |
30 | 25, 26, 29 | 3eqtr4ri 2857 | . 2 ⊢ ((3 / 2) · 2) = ((1.5) · 2) |
31 | mulcan2 11280 | . . 3 ⊢ (((3 / 2) ∈ ℂ ∧ (1.5) ∈ ℂ ∧ (2 ∈ ℂ ∧ 2 ≠ 0)) → (((3 / 2) · 2) = ((1.5) · 2) ↔ (3 / 2) = (1.5))) | |
32 | 31 | biimpa 479 | . 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 690 | 1 ⊢ (3 / 2) = (1.5) |
Colors of variables: wff setvar class |
Syntax hints: ∧ wa 398 ∧ w3a 1083 = wceq 1537 ∈ wcel 2114 ≠ wne 3018 (class class class)co 7158 ℂcc 10537 ℝcr 10538 0cc0 10539 1c1 10540 + caddc 10542 · cmul 10544 / cdiv 11299 2c2 11695 3c3 11696 5c5 11698 ℕ0cn0 11900 ;cdc 12101 .cdp 30566 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 ax-resscn 10596 ax-1cn 10597 ax-icn 10598 ax-addcl 10599 ax-addrcl 10600 ax-mulcl 10601 ax-mulrcl 10602 ax-mulcom 10603 ax-addass 10604 ax-mulass 10605 ax-distr 10606 ax-i2m1 10607 ax-1ne0 10608 ax-1rid 10609 ax-rnegex 10610 ax-rrecex 10611 ax-cnre 10612 ax-pre-lttri 10613 ax-pre-lttrn 10614 ax-pre-ltadd 10615 ax-pre-mulgt0 10616 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-nel 3126 df-ral 3145 df-rex 3146 df-reu 3147 df-rmo 3148 df-rab 3149 df-v 3498 df-sbc 3775 df-csb 3886 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-pss 3956 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-tp 4574 df-op 4576 df-uni 4841 df-iun 4923 df-br 5069 df-opab 5131 df-mpt 5149 df-tr 5175 df-id 5462 df-eprel 5467 df-po 5476 df-so 5477 df-fr 5516 df-we 5518 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-pred 6150 df-ord 6196 df-on 6197 df-lim 6198 df-suc 6199 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-f1 6362 df-fo 6363 df-f1o 6364 df-fv 6365 df-riota 7116 df-ov 7161 df-oprab 7162 df-mpo 7163 df-om 7583 df-wrecs 7949 df-recs 8010 df-rdg 8048 df-er 8291 df-en 8512 df-dom 8513 df-sdom 8514 df-pnf 10679 df-mnf 10680 df-xr 10681 df-ltxr 10682 df-le 10683 df-sub 10874 df-neg 10875 df-div 11300 df-nn 11641 df-2 11703 df-3 11704 df-4 11705 df-5 11706 df-6 11707 df-7 11708 df-8 11709 df-9 11710 df-n0 11901 df-dec 12102 df-dp2 30550 df-dp 30567 |
This theorem is referenced by: (None) |
Copyright terms: Public domain | W3C validator |