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| Mirrors > Home > MPE Home > Th. List > halfpm6th | Structured version Visualization version GIF version | ||
| Description: One half plus or minus one sixth. (Contributed by Paul Chapman, 17-Jan-2008.) (Proof shortened by SN, 22-Oct-2025.) |
| Ref | Expression |
|---|---|
| halfpm6th | ⊢ (((1 / 2) − (1 / 6)) = (1 / 3) ∧ ((1 / 2) + (1 / 6)) = (2 / 3)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 3cn 12238 | . . . 4 ⊢ 3 ∈ ℂ | |
| 2 | 3ne0 12263 | . . . 4 ⊢ 3 ≠ 0 | |
| 3 | 1, 2 | reccli 11883 | . . 3 ⊢ (1 / 3) ∈ ℂ |
| 4 | 6cn 12248 | . . . 4 ⊢ 6 ∈ ℂ | |
| 5 | 6re 12247 | . . . . 5 ⊢ 6 ∈ ℝ | |
| 6 | 6pos 12267 | . . . . 5 ⊢ 0 < 6 | |
| 7 | 5, 6 | gt0ne0ii 11685 | . . . 4 ⊢ 6 ≠ 0 |
| 8 | 4, 7 | reccli 11883 | . . 3 ⊢ (1 / 6) ∈ ℂ |
| 9 | halfcn 12367 | . . . . 5 ⊢ (1 / 2) ∈ ℂ | |
| 10 | 3, 9 | pncan3i 11470 | . . . 4 ⊢ ((1 / 3) + ((1 / 2) − (1 / 3))) = (1 / 2) |
| 11 | halfthird 12374 | . . . . 5 ⊢ ((1 / 2) − (1 / 3)) = (1 / 6) | |
| 12 | 11 | oveq2i 7379 | . . . 4 ⊢ ((1 / 3) + ((1 / 2) − (1 / 3))) = ((1 / 3) + (1 / 6)) |
| 13 | 10, 12 | eqtr3i 2762 | . . 3 ⊢ (1 / 2) = ((1 / 3) + (1 / 6)) |
| 14 | 3, 8, 13 | mvrraddi 11409 | . 2 ⊢ ((1 / 2) − (1 / 6)) = (1 / 3) |
| 15 | 11 | oveq2i 7379 | . . 3 ⊢ ((1 / 2) + ((1 / 2) − (1 / 3))) = ((1 / 2) + (1 / 6)) |
| 16 | 9, 9, 3 | addsubassi 11484 | . . . 4 ⊢ (((1 / 2) + (1 / 2)) − (1 / 3)) = ((1 / 2) + ((1 / 2) − (1 / 3))) |
| 17 | 2cn 12232 | . . . . . 6 ⊢ 2 ∈ ℂ | |
| 18 | 17, 1, 2 | divcli 11895 | . . . . 5 ⊢ (2 / 3) ∈ ℂ |
| 19 | ax-1cn 11096 | . . . . . . 7 ⊢ 1 ∈ ℂ | |
| 20 | 2halves 12371 | . . . . . . 7 ⊢ (1 ∈ ℂ → ((1 / 2) + (1 / 2)) = 1) | |
| 21 | 19, 20 | ax-mp 5 | . . . . . 6 ⊢ ((1 / 2) + (1 / 2)) = 1 |
| 22 | 2p1e3 12294 | . . . . . . . 8 ⊢ (2 + 1) = 3 | |
| 23 | 22 | oveq1i 7378 | . . . . . . 7 ⊢ ((2 + 1) / 3) = (3 / 3) |
| 24 | 1, 2 | dividi 11886 | . . . . . . 7 ⊢ (3 / 3) = 1 |
| 25 | 23, 24 | eqtri 2760 | . . . . . 6 ⊢ ((2 + 1) / 3) = 1 |
| 26 | 17, 19, 1, 2 | divdiri 11910 | . . . . . 6 ⊢ ((2 + 1) / 3) = ((2 / 3) + (1 / 3)) |
| 27 | 21, 25, 26 | 3eqtr2i 2766 | . . . . 5 ⊢ ((1 / 2) + (1 / 2)) = ((2 / 3) + (1 / 3)) |
| 28 | 18, 3, 27 | mvrraddi 11409 | . . . 4 ⊢ (((1 / 2) + (1 / 2)) − (1 / 3)) = (2 / 3) |
| 29 | 16, 28 | eqtr3i 2762 | . . 3 ⊢ ((1 / 2) + ((1 / 2) − (1 / 3))) = (2 / 3) |
| 30 | 15, 29 | eqtr3i 2762 | . 2 ⊢ ((1 / 2) + (1 / 6)) = (2 / 3) |
| 31 | 14, 30 | pm3.2i 470 | 1 ⊢ (((1 / 2) − (1 / 6)) = (1 / 3) ∧ ((1 / 2) + (1 / 6)) = (2 / 3)) |
| Colors of variables: wff setvar class |
| Syntax hints: ∧ wa 395 = wceq 1542 ∈ wcel 2114 (class class class)co 7368 ℂcc 11036 1c1 11039 + caddc 11041 − cmin 11376 / cdiv 11806 2c2 12212 3c3 12213 6c6 12216 |
| 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 5243 ax-nul 5253 ax-pow 5312 ax-pr 5379 ax-un 7690 ax-resscn 11095 ax-1cn 11096 ax-icn 11097 ax-addcl 11098 ax-addrcl 11099 ax-mulcl 11100 ax-mulrcl 11101 ax-mulcom 11102 ax-addass 11103 ax-mulass 11104 ax-distr 11105 ax-i2m1 11106 ax-1ne0 11107 ax-1rid 11108 ax-rnegex 11109 ax-rrecex 11110 ax-cnre 11111 ax-pre-lttri 11112 ax-pre-lttrn 11113 ax-pre-ltadd 11114 ax-pre-mulgt0 11115 |
| 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 3352 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-iun 4950 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5527 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-we 5587 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-pred 6267 df-ord 6328 df-on 6329 df-lim 6330 df-suc 6331 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-riota 7325 df-ov 7371 df-oprab 7372 df-mpo 7373 df-om 7819 df-2nd 7944 df-frecs 8233 df-wrecs 8264 df-recs 8313 df-rdg 8351 df-er 8645 df-en 8896 df-dom 8897 df-sdom 8898 df-pnf 11180 df-mnf 11181 df-xr 11182 df-ltxr 11183 df-le 11184 df-sub 11378 df-neg 11379 df-div 11807 df-nn 12158 df-2 12220 df-3 12221 df-4 12222 df-5 12223 df-6 12224 |
| This theorem is referenced by: cos01bnd 16123 1cubrlem 26822 |
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