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| Mirrors > Home > MPE Home > Th. List > mullid | Structured version Visualization version GIF version | ||
| Description: Identity law for multiplication. See mulrid 11234 for commuted version. (Contributed by NM, 8-Oct-1999.) |
| Ref | Expression |
|---|---|
| mullid | ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ax-1cn 11186 | . . 3 ⊢ 1 ∈ ℂ | |
| 2 | mulcom 11214 | . . 3 ⊢ ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (1 · 𝐴) = (𝐴 · 1)) | |
| 3 | 1, 2 | mpan 703 | . 2 ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = (𝐴 · 1)) |
| 4 | mulrid 11234 | . 2 ⊢ (𝐴 ∈ ℂ → (𝐴 · 1) = 𝐴) | |
| 5 | 3, 4 | eqtrd 2797 | 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 7417 ℂcc 11126 1c1 11129 · cmul 11133 |
| 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 2734 ax-resscn 11185 ax-1cn 11186 ax-icn 11187 ax-addcl 11188 ax-mulcl 11190 ax-mulcom 11192 ax-mulass 11194 ax-distr 11195 ax-1rid 11198 ax-cnre 11201 |
| 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 2741 df-cleq 2754 df-clel 2837 df-rex 3089 df-rab 3415 df-v 3455 df-dif 3905 df-un 3907 df-ss 3919 df-nul 4283 df-if 4486 df-sn 4588 df-pr 4590 df-op 4594 df-uni 4871 df-br 5108 df-iota 6493 df-fv 6545 df-ov 7420 |
| This theorem is used by: mullidi 11242 mullidd 11255 muladd11 11408 1p1times 11409 mul02lem1 11414 cnegex2 11420 mulm1 11683 div1 11932 subdivcomb2 11939 recdiv 11949 divdiv2 11955 conjmul 11960 ser1const 14126 expp1 14136 recan 15428 arisum 15953 geo2sum 15966 prodrblem 16022 prodmolem2a 16027 risefac1 16125 fallfac1 16126 bpoly3 16150 bpoly4 16151 sinhval 16248 coshval 16249 demoivreALT 16295 gcdadd 16622 gcdid 16623 cncrng 21612 cnfld1 21616 blcvx 25030 icccvx 25184 cnlmod 25374 coeidp 26496 dgrid 26497 quartlem1 27102 asinsinlem 27136 asinsin 27137 atantan 27168 musumsum 27436 brbtwn2 29370 axsegconlem1 29382 ax5seglem1 29393 ax5seglem2 29394 ax5seglem4 29397 ax5seglem5 29398 axeuclid 29428 axcontlem2 29430 axcontlem4 29432 cncvcOLD 31072 dvcosax 46762 sin3t 47743 cos3t 47744 sin5tlem4 47748 sqrtnpoly 47769 |
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