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| Mirrors > Home > MPE Home > Th. List > mullid | Structured version Visualization version GIF version | ||
| Description: Identity law for multiplication. See mulrid 11207 for commuted version. (Contributed by NM, 8-Oct-1999.) |
| Ref | Expression |
|---|---|
| mullid | ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ax-1cn 11159 | . . 3 ⊢ 1 ∈ ℂ | |
| 2 | mulcom 11187 | . . 3 ⊢ ((1 ∈ ℂ ∧ 𝐴 ∈ ℂ) → (1 · 𝐴) = (𝐴 · 1)) | |
| 3 | 1, 2 | mpan 702 | . 2 ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = (𝐴 · 1)) |
| 4 | mulrid 11207 | . 2 ⊢ (𝐴 ∈ ℂ → (𝐴 · 1) = 𝐴) | |
| 5 | 3, 4 | eqtrd 2798 | 1 ⊢ (𝐴 ∈ ℂ → (1 · 𝐴) = 𝐴) |
| Colors of variables: wff setvar class |
| Syntax hints: → wi 4 = wceq 1570 ∈ wcel 2143 (class class class)co 7412 ℂcc 11099 1c1 11102 · cmul 11106 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 ax-resscn 11158 ax-1cn 11159 ax-icn 11160 ax-addcl 11161 ax-mulcl 11163 ax-mulcom 11165 ax-mulass 11167 ax-distr 11168 ax-1rid 11171 ax-cnre 11174 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3909 df-un 3911 df-ss 3923 df-nul 4288 df-if 4489 df-sn 4591 df-pr 4593 df-op 4597 df-uni 4874 df-br 5111 df-iota 6494 df-fv 6546 df-ov 7415 |
| This theorem is referenced by: mullidi 11215 mullidd 11228 muladd11 11381 1p1times 11382 mul02lem1 11387 cnegex2 11393 mulm1 11656 div1 11905 subdivcomb2 11912 recdiv 11922 divdiv2 11928 conjmul 11933 ser1const 14096 expp1 14106 recan 15390 arisum 15916 geo2sum 15929 prodrblem 15985 prodmolem2a 15990 risefac1 16088 fallfac1 16089 bpoly3 16113 bpoly4 16114 sinhval 16211 coshval 16212 demoivreALT 16258 gcdadd 16585 gcdid 16586 cncrng 21524 cnfld1 21528 blcvx 24936 icccvx 25090 cnlmod 25280 coeidp 26401 dgrid 26402 quartlem1 27000 asinsinlem 27034 asinsin 27035 atantan 27066 musumsum 27334 brbtwn2 29233 axsegconlem1 29245 ax5seglem1 29256 ax5seglem2 29257 ax5seglem4 29260 ax5seglem5 29261 axeuclid 29291 axcontlem2 29293 axcontlem4 29295 cncvcOLD 30913 dvcosax 46620 sin3t 47585 cos3t 47586 sin5tlem4 47590 |
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