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Mirrors > Home > MPE Home > Th. List > mulid2 | Structured version Visualization version GIF version |
Description: Identity law for multiplication. See mulid1 10796 for commuted version. (Contributed by NM, 8-Oct-1999.) |
Ref | Expression |
---|---|
mulid2 | ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-1cn 10752 | . . 3 ⊢ 1 ∈ ℂ | |
2 | mulcom 10780 | . . 3 ⊢ ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (1 · 𝐴) = (𝐴 · 1)) | |
3 | 1, 2 | mpan 690 | . 2 ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = (𝐴 · 1)) |
4 | mulid1 10796 | . 2 ⊢ (𝐴 ∈ ℂ → (𝐴 · 1) = 𝐴) | |
5 | 3, 4 | eqtrd 2771 | 1 ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1543 ∈ wcel 2112 (class class class)co 7191 ℂcc 10692 1c1 10695 · cmul 10699 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1803 ax-4 1817 ax-5 1918 ax-6 1976 ax-7 2018 ax-8 2114 ax-9 2122 ax-ext 2708 ax-resscn 10751 ax-1cn 10752 ax-icn 10753 ax-addcl 10754 ax-mulcl 10756 ax-mulcom 10758 ax-mulass 10760 ax-distr 10761 ax-1rid 10764 ax-cnre 10767 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 848 df-3an 1091 df-tru 1546 df-fal 1556 df-ex 1788 df-sb 2073 df-clab 2715 df-cleq 2728 df-clel 2809 df-ral 3056 df-rex 3057 df-rab 3060 df-v 3400 df-dif 3856 df-un 3858 df-in 3860 df-ss 3870 df-nul 4224 df-if 4426 df-sn 4528 df-pr 4530 df-op 4534 df-uni 4806 df-br 5040 df-iota 6316 df-fv 6366 df-ov 7194 |
This theorem is referenced by: mulid2i 10803 mulid2d 10816 muladd11 10967 1p1times 10968 mul02lem1 10973 cnegex2 10979 mulm1 11238 div1 11486 subdivcomb2 11493 recdiv 11503 divdiv2 11509 conjmul 11514 ser1const 13597 expp1 13607 recan 14865 arisum 15387 geo2sum 15400 prodrblem 15454 prodmolem2a 15459 risefac1 15558 fallfac1 15559 bpoly3 15583 bpoly4 15584 sinhval 15678 coshval 15679 demoivreALT 15725 gcdadd 16048 gcdid 16049 cncrng 20338 cnfld1 20342 blcvx 23649 icccvx 23801 cnlmod 23991 coeidp 25111 dgrid 25112 quartlem1 25694 asinsinlem 25728 asinsin 25729 atantan 25760 musumsum 26028 brbtwn2 26950 axsegconlem1 26962 ax5seglem1 26973 ax5seglem2 26974 ax5seglem4 26977 ax5seglem5 26978 axeuclid 27008 axcontlem2 27010 axcontlem4 27012 cncvcOLD 28618 dvcosax 43085 |
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