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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 12295 | . . . . 5 ⊢ 3 ∈ ℝ | |
| 2 | 2re 12289 | . . . . 5 ⊢ 2 ∈ ℝ | |
| 3 | 2ne0 12321 | . . . . 5 ⊢ 2 ≠ 0 | |
| 4 | 1, 2, 3 | redivcli 11955 | . . . 4 ⊢ (3 / 2) ∈ ℝ |
| 5 | 4 | recni 11193 | . . 3 ⊢ (3 / 2) ∈ ℂ |
| 6 | 1nn0 12494 | . . . . 5 ⊢ 1 ∈ ℕ0 | |
| 7 | 5re 12302 | . . . . 5 ⊢ 5 ∈ ℝ | |
| 8 | dpcl 33029 | . . . . 5 ⊢ ((1 ∈ ℕ0 ∧ 5 ∈ ℝ) → (1.5) ∈ ℝ) | |
| 9 | 6, 7, 8 | mp2an 702 | . . . 4 ⊢ (1.5) ∈ ℝ |
| 10 | 9 | recni 11193 | . . 3 ⊢ (1.5) ∈ ℂ |
| 11 | 2cnne0 12427 | . . 3 ⊢ (2 ∈ ℂ ∧ 2 ≠ 0) | |
| 12 | 5, 10, 11 | 3pm3.2i 1352 | . 2 ⊢ ((3 / 2) ∈ ℂ ∧ (1.5) ∈ ℂ ∧ (2 ∈ ℂ ∧ 2 ≠ 0)) |
| 13 | 5nn0 12498 | . . . . 5 ⊢ 5 ∈ ℕ0 | |
| 14 | 3nn0 12496 | . . . . 5 ⊢ 3 ∈ ℕ0 | |
| 15 | 0nn0 12493 | . . . . 5 ⊢ 0 ∈ ℕ0 | |
| 16 | eqid 2761 | . . . . . 6 ⊢ ;15 = ;15 | |
| 17 | df-2 12277 | . . . . . . . 8 ⊢ 2 = (1 + 1) | |
| 18 | 17 | oveq1i 7402 | . . . . . . 7 ⊢ (2 + 1) = ((1 + 1) + 1) |
| 19 | 2p1e3 12356 | . . . . . . 7 ⊢ (2 + 1) = 3 | |
| 20 | 18, 19 | eqtr3i 2786 | . . . . . 6 ⊢ ((1 + 1) + 1) = 3 |
| 21 | 5p5e10 12761 | . . . . . 6 ⊢ (5 + 5) = ;10 | |
| 22 | 6, 13, 6, 13, 16, 16, 20, 15, 21 | decaddc 12745 | . . . . 5 ⊢ (;15 + ;15) = ;30 |
| 23 | 6, 13, 6, 13, 14, 15, 22 | dpadd 33049 | . . . 4 ⊢ ((1.5) + (1.5)) = (3.0) |
| 24 | 14 | dp0u 33039 | . . . 4 ⊢ (3.0) = 3 |
| 25 | 23, 24 | eqtri 2784 | . . 3 ⊢ ((1.5) + (1.5)) = 3 |
| 26 | 10 | times2i 12353 | . . 3 ⊢ ((1.5) · 2) = ((1.5) + (1.5)) |
| 27 | 1 | recni 11193 | . . . 4 ⊢ 3 ∈ ℂ |
| 28 | 11 | simpli 487 | . . . 4 ⊢ 2 ∈ ℂ |
| 29 | 27, 28, 3 | divcan1i 11932 | . . 3 ⊢ ((3 / 2) · 2) = 3 |
| 30 | 25, 26, 29 | 3eqtr4ri 2795 | . 2 ⊢ ((3 / 2) · 2) = ((1.5) · 2) |
| 31 | mulcan2 11822 | . . 3 ⊢ (((3 / 2) ∈ ℂ ∧ (1.5) ∈ ℂ ∧ (2 ∈ ℂ ∧ 2 ≠ 0)) → (((3 / 2) · 2) = ((1.5) · 2) ↔ (3 / 2) = (1.5))) | |
| 32 | 31 | biimpa 480 | . 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 702 | 1 ⊢ (3 / 2) = (1.5) |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 399 ∧ w3a 1097 = wceq 1559 ∈ wcel 2141 ≠ wne 2956 (class class class)co 7392 ℂcc 11068 ℝcr 11069 0cc0 11070 1c1 11071 + caddc 11073 · cmul 11075 / cdiv 11841 2c2 12269 3c3 12270 5c5 12272 ℕ0cn0 12478 ;cdc 12685 .cdp 33026 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-10 2174 ax-11 2190 ax-12 2211 ax-ext 2733 ax-sep 5245 ax-nul 5255 ax-pow 5321 ax-pr 5389 ax-un 7714 ax-resscn 11127 ax-1cn 11128 ax-icn 11129 ax-addcl 11130 ax-addrcl 11131 ax-mulcl 11132 ax-mulrcl 11133 ax-mulcom 11134 ax-addass 11135 ax-mulass 11136 ax-distr 11137 ax-i2m1 11138 ax-1ne0 11139 ax-1rid 11140 ax-rnegex 11141 ax-rrecex 11142 ax-cnre 11143 ax-pre-lttri 11144 ax-pre-lttrn 11145 ax-pre-ltadd 11146 ax-pre-mulgt0 11147 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3or 1098 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-nf 1803 df-sb 2090 df-mo 2565 df-eu 2595 df-clab 2740 df-cleq 2753 df-clel 2836 df-nfc 2910 df-ne 2957 df-nel 3061 df-ral 3076 df-rex 3086 df-rmo 3366 df-reu 3367 df-rab 3414 df-v 3455 df-sbc 3745 df-csb 3853 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-pss 3924 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4582 df-pr 4584 df-op 4588 df-uni 4865 df-iun 4950 df-br 5100 df-opab 5162 df-mpt 5181 df-tr 5207 df-id 5540 df-eprel 5545 df-po 5553 df-so 5554 df-fr 5598 df-we 5600 df-xp 5651 df-rel 5652 df-cnv 5653 df-co 5654 df-dm 5655 df-rn 5656 df-res 5657 df-ima 5658 df-pred 6284 df-ord 6345 df-on 6346 df-lim 6347 df-suc 6348 df-iota 6473 df-fun 6519 df-fn 6520 df-f 6521 df-f1 6522 df-fo 6523 df-f1o 6524 df-fv 6525 df-riota 7349 df-ov 7395 df-oprab 7396 df-mpo 7397 df-om 7843 df-2nd 7967 df-frecs 8257 df-wrecs 8288 df-recs 8337 df-rdg 8376 df-er 8673 df-en 8924 df-dom 8925 df-sdom 8926 df-pnf 11215 df-mnf 11216 df-xr 11217 df-ltxr 11218 df-le 11219 df-sub 11413 df-neg 11414 df-div 11842 df-nn 12208 df-2 12277 df-3 12278 df-4 12279 df-5 12280 df-6 12281 df-7 12282 df-8 12283 df-9 12284 df-n0 12479 df-dec 12686 df-dp2 33010 df-dp 33027 |
| This theorem is referenced by: (None) |
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