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| Mirrors > Home > MPE Home > Th. List > mullid | Structured version Visualization version GIF version | ||
| Description: Identity law for multiplication. See mulrid 11224 for commuted version. (Contributed by NM, 8-Oct-1999.) |
| Ref | Expression |
|---|---|
| mullid | ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ax-1cn 11176 | . . 3 ⊢ 1 ∈ ℂ | |
| 2 | mulcom 11204 | . . 3 ⊢ ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (1 · 𝐴) = (𝐴 · 1)) | |
| 3 | 1, 2 | mpan 703 | . 2 ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = (𝐴 · 1)) |
| 4 | mulrid 11224 | . 2 ⊢ (𝐴 ∈ ℂ → (𝐴 · 1) = 𝐴) | |
| 5 | 3, 4 | eqtrd 2801 | 1 ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2146 (class class class)co 7423 ℂcc 11116 1c1 11119 · cmul 11123 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-ext 2738 ax-resscn 11175 ax-1cn 11176 ax-icn 11177 ax-addcl 11178 ax-mulcl 11180 ax-mulcom 11182 ax-mulass 11184 ax-distr 11185 ax-1rid 11188 ax-cnre 11191 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2745 df-cleq 2758 df-clel 2841 df-rex 3093 df-rab 3420 df-v 3460 df-dif 3911 df-un 3913 df-ss 3925 df-nul 4290 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-uni 4878 df-br 5115 df-iota 6499 df-fv 6551 df-ov 7426 |
| This theorem is used by: mullidi 11232 mullidd 11245 muladd11 11398 1p1times 11399 mul02lem1 11404 cnegex2 11410 mulm1 11673 div1 11922 subdivcomb2 11929 recdiv 11939 divdiv2 11945 conjmul 11950 ser1const 14114 expp1 14124 recan 15414 arisum 15940 geo2sum 15953 prodrblem 16009 prodmolem2a 16014 risefac1 16112 fallfac1 16113 bpoly3 16137 bpoly4 16138 sinhval 16235 coshval 16236 demoivreALT 16282 gcdadd 16609 gcdid 16610 cncrng 21580 cnfld1 21584 blcvx 24992 icccvx 25146 cnlmod 25336 coeidp 26457 dgrid 26458 quartlem1 27059 asinsinlem 27093 asinsin 27094 atantan 27125 musumsum 27393 brbtwn2 29292 axsegconlem1 29304 ax5seglem1 29315 ax5seglem2 29316 ax5seglem4 29319 ax5seglem5 29320 axeuclid 29350 axcontlem2 29352 axcontlem4 29354 cncvcOLD 30972 dvcosax 46681 sin3t 47649 cos3t 47650 sin5tlem4 47654 |
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