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| Mirrors > Home > MPE Home > Th. List > mullid | Structured version Visualization version GIF version | ||
| Description: Identity law for multiplication. See mulrid 11287 for commuted version. (Contributed by NM, 8-Oct-1999.) |
| Ref | Expression |
|---|---|
| mullid | ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ax-1cn 11239 | . . 3 ⊢ 1 ∈ ℂ | |
| 2 | mulcom 11267 | . . 3 ⊢ ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (1 · 𝐴) = (𝐴 · 1)) | |
| 3 | 1, 2 | mpan 703 | . 2 ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = (𝐴 · 1)) |
| 4 | mulrid 11287 | . 2 ⊢ (𝐴 ∈ ℂ → (𝐴 · 1) = 𝐴) | |
| 5 | 3, 4 | eqtrd 2796 | 1 ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: → wi 4 = wceq 1570 ∈ wcel 2145 (class class class)co 7412 ℂcc 11179 1c1 11182 · cmul 11186 |
| 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 2147 ax-9 2155 ax-ext 2733 ax-resscn 11238 ax-1cn 11239 ax-icn 11240 ax-addcl 11241 ax-mulcl 11243 ax-mulcom 11245 ax-mulass 11247 ax-distr 11248 ax-1rid 11251 ax-cnre 11254 |
| 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 2740 df-cleq 2753 df-clel 2836 df-rex 3088 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-iota 6487 df-fv 6539 df-ov 7415 |
| This theorem is used by: mullidi 11295 mullidd 11308 muladd11 11461 1p1times 11462 mul02lem1 11467 cnegex2 11473 mulm1 11738 div1 11987 subdivcomb2 11994 recdiv 12004 divdiv2 12010 conjmul 12015 ser1const 14181 expp1 14191 recan 15484 arisum 16009 geo2sum 16022 prodrblem 16076 prodmolem2a 16081 risefac1 16179 fallfac1 16180 bpoly3 16204 bpoly4 16205 sinhval 16302 coshval 16303 demoivreALT 16349 gcdadd 16678 gcdid 16679 cncrng 21679 cnfld1 21683 blcvx 25097 icccvx 25251 cnlmod 25441 coeidp 26562 dgrid 26563 quartlem1 27167 asinsinlem 27201 asinsin 27202 atantan 27233 musumsum 27501 brbtwn2 29465 axsegconlem1 29477 ax5seglem1 29488 ax5seglem2 29489 ax5seglem4 29492 ax5seglem5 29493 axeuclid 29523 axcontlem2 29525 axcontlem4 29527 cncvcOLD 31167 dvcosax 46880 sin3t 47861 cos3t 47862 sin5tlem4 47866 sqrtnpoly 47887 |
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