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| Mirrors > Home > MPE Home > Th. List > mullid | Structured version Visualization version GIF version | ||
| Description: Identity law for multiplication. See mulrid 11309 for commuted version. (Contributed by NM, 8-Oct-1999.) |
| Ref | Expression |
|---|---|
| mullid | ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ax-1cn 11261 | . . 3 ⊢ 1 ∈ ℂ | |
| 2 | mulcom 11289 | . . 3 ⊢ ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (1 · 𝐴) = (𝐴 · 1)) | |
| 3 | 1, 2 | mpan 703 | . 2 ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = (𝐴 · 1)) |
| 4 | mulrid 11309 | . 2 ⊢ (𝐴 ∈ ℂ → (𝐴 · 1) = 𝐴) | |
| 5 | 3, 4 | eqtrd 2795 | 1 ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1569 ∈ wcel 2144 (class class class)co 7420 ℂcc 11201 1c1 11204 · cmul 11208 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 ax-resscn 11260 ax-1cn 11261 ax-icn 11262 ax-addcl 11263 ax-mulcl 11265 ax-mulcom 11267 ax-mulass 11269 ax-distr 11270 ax-1rid 11273 ax-cnre 11276 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3896 df-dif 4047 df-un 4151 df-nul 4279 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-uni 4867 df-br 5103 df-iota 6494 df-fv 6546 df-ov 7423 |
| This theorem is used by: mullidi 11317 mullidd 11330 muladd11 11483 1p1times 11484 mul02lem1 11489 cnegex2 11495 mulm1 11760 div1 12009 subdivcomb2 12016 recdiv 12026 divdiv2 12032 conjmul 12037 ser1const 14204 expp1 14214 recan 15509 arisum 16034 geo2sum 16047 prodrblem 16101 prodmolem2a 16106 risefac1 16204 fallfac1 16205 bpoly3 16229 bpoly4 16230 sinhval 16327 coshval 16328 demoivreALT 16374 gcdadd 16703 gcdid 16704 cncrng 21704 cnfld1 21708 blcvx 25122 icccvx 25276 cnlmod 25466 coeidp 26587 dgrid 26588 quartlem1 27190 asinsinlem 27224 asinsin 27225 atantan 27256 musumsum 27524 brbtwn2 29488 axsegconlem1 29500 ax5seglem1 29511 ax5seglem2 29512 ax5seglem4 29515 ax5seglem5 29516 axeuclid 29546 axcontlem2 29548 axcontlem4 29550 cncvcOLD 31190 dvcosax 47029 sin3t 48010 cos3t 48011 sin5tlem4 48015 sqrtnpoly 48036 |
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