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| Mirrors > Home > MPE Home > Th. List > 2halves | Structured version Visualization version GIF version | ||
| Description: Two halves make a whole. (Contributed by NM, 11-Apr-2005.) |
| Ref | Expression |
|---|---|
| 2halves | ⊢ (𝐴 ∈ ℂ → ((𝐴 / 2) + (𝐴 / 2)) = 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2times 12276 | . . 3 ⊢ (𝐴 ∈ ℂ → (2 · 𝐴) = (𝐴 + 𝐴)) | |
| 2 | 1 | oveq1d 7373 | . 2 ⊢ (𝐴 ∈ ℂ → ((2 · 𝐴) / 2) = ((𝐴 + 𝐴) / 2)) |
| 3 | 2cn 12220 | . . 3 ⊢ 2 ∈ ℂ | |
| 4 | 2ne0 12249 | . . 3 ⊢ 2 ≠ 0 | |
| 5 | divcan3 11822 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 2 ∈ ℂ ∧ 2 ≠ 0) → ((2 · 𝐴) / 2) = 𝐴) | |
| 6 | 3, 4, 5 | mp3an23 1455 | . 2 ⊢ (𝐴 ∈ ℂ → ((2 · 𝐴) / 2) = 𝐴) |
| 7 | 2cnne0 12350 | . . . 4 ⊢ (2 ∈ ℂ ∧ 2 ≠ 0) | |
| 8 | divdir 11821 | . . . 4 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ∈ ℂ ∧ (2 ∈ ℂ ∧ 2 ≠ 0)) → ((𝐴 + 𝐴) / 2) = ((𝐴 / 2) + (𝐴 / 2))) | |
| 9 | 7, 8 | mp3an3 1452 | . . 3 ⊢ ((𝐴 ∈ ℂ ∧ 𝐴 ∈ ℂ) → ((𝐴 + 𝐴) / 2) = ((𝐴 / 2) + (𝐴 / 2))) |
| 10 | 9 | anidms 566 | . 2 ⊢ (𝐴 ∈ ℂ → ((𝐴 + 𝐴) / 2) = ((𝐴 / 2) + (𝐴 / 2))) |
| 11 | 2, 6, 10 | 3eqtr3rd 2780 | 1 ⊢ (𝐴 ∈ ℂ → ((𝐴 / 2) + (𝐴 / 2)) = 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 ∧ wa 395 = wceq 1541 ∈ wcel 2113 ≠ wne 2932 (class class class)co 7358 ℂcc 11024 0cc0 11026 + caddc 11029 · cmul 11031 / cdiv 11794 2c2 12200 |
| 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 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2184 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pow 5310 ax-pr 5377 ax-un 7680 ax-resscn 11083 ax-1cn 11084 ax-icn 11085 ax-addcl 11086 ax-addrcl 11087 ax-mulcl 11088 ax-mulrcl 11089 ax-mulcom 11090 ax-addass 11091 ax-mulass 11092 ax-distr 11093 ax-i2m1 11094 ax-1ne0 11095 ax-1rid 11096 ax-rnegex 11097 ax-rrecex 11098 ax-cnre 11099 ax-pre-lttri 11100 ax-pre-lttrn 11101 ax-pre-ltadd 11102 ax-pre-mulgt0 11103 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2539 df-eu 2569 df-clab 2715 df-cleq 2728 df-clel 2811 df-nfc 2885 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3061 df-rmo 3350 df-reu 3351 df-rab 3400 df-v 3442 df-sbc 3741 df-csb 3850 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-pss 3921 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-iun 4948 df-br 5099 df-opab 5161 df-mpt 5180 df-tr 5206 df-id 5519 df-eprel 5524 df-po 5532 df-so 5533 df-fr 5577 df-we 5579 df-xp 5630 df-rel 5631 df-cnv 5632 df-co 5633 df-dm 5634 df-rn 5635 df-res 5636 df-ima 5637 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 7315 df-ov 7361 df-oprab 7362 df-mpo 7363 df-om 7809 df-2nd 7934 df-frecs 8223 df-wrecs 8254 df-recs 8303 df-rdg 8341 df-er 8635 df-en 8884 df-dom 8885 df-sdom 8886 df-pnf 11168 df-mnf 11169 df-xr 11170 df-ltxr 11171 df-le 11172 df-sub 11366 df-neg 11367 df-div 11795 df-nn 12146 df-2 12208 |
| This theorem is referenced by: 1mhlfehlf 12360 halfpm6th 12363 halfpos 12371 lt2halves 12376 2halvesd 12387 pcoass 24980 pidiv2halves 26432 sincos4thpi 26478 efeq1 26493 cxpsqrt 26668 dvsqrt 26707 dvcnsqrt 26709 subfacval3 35383 dnibndlem5 36682 dnibndlem10 36687 infleinflem1 45614 smflimlem4 47018 |
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