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Mirrors > Home > MPE Home > Th. List > mulid2 | Structured version Visualization version GIF version |
Description: Identity law for multiplication. See mulid1 10639 for commuted version. (Contributed by NM, 8-Oct-1999.) |
Ref | Expression |
---|---|
mulid2 | ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-1cn 10595 | . . 3 ⊢ 1 ∈ ℂ | |
2 | mulcom 10623 | . . 3 ⊢ ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (1 · 𝐴) = (𝐴 · 1)) | |
3 | 1, 2 | mpan 688 | . 2 ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = (𝐴 · 1)) |
4 | mulid1 10639 | . 2 ⊢ (𝐴 ∈ ℂ → (𝐴 · 1) = 𝐴) | |
5 | 3, 4 | eqtrd 2856 | 1 ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1537 ∈ wcel 2114 (class class class)co 7156 ℂcc 10535 1c1 10538 · cmul 10542 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-resscn 10594 ax-1cn 10595 ax-icn 10596 ax-addcl 10597 ax-mulcl 10599 ax-mulcom 10601 ax-mulass 10603 ax-distr 10604 ax-1rid 10607 ax-cnre 10610 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4839 df-br 5067 df-iota 6314 df-fv 6363 df-ov 7159 |
This theorem is referenced by: mulid2i 10646 mulid2d 10659 muladd11 10810 1p1times 10811 mul02lem1 10816 cnegex2 10822 mulm1 11081 div1 11329 subdivcomb2 11336 recdiv 11346 divdiv2 11352 conjmul 11357 ser1const 13427 expp1 13437 recan 14696 arisum 15215 geo2sum 15229 prodrblem 15283 prodmolem2a 15288 risefac1 15387 fallfac1 15388 bpoly3 15412 bpoly4 15413 sinhval 15507 coshval 15508 demoivreALT 15554 gcdadd 15874 gcdid 15875 cncrng 20566 cnfld1 20570 blcvx 23406 icccvx 23554 cnlmod 23744 coeidp 24853 dgrid 24854 quartlem1 25435 asinsinlem 25469 asinsin 25470 atantan 25501 musumsum 25769 brbtwn2 26691 axsegconlem1 26703 ax5seglem1 26714 ax5seglem2 26715 ax5seglem4 26718 ax5seglem5 26719 axeuclid 26749 axcontlem2 26751 axcontlem4 26753 cncvcOLD 28360 dvcosax 42231 |
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