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Related theorems GIF version |
| Description: 1 is an identity element for multiplication. Axiom 16 of 25 for real and complex numbers, derived from ZF set theory. |
| Ref | Expression |
|---|---|
| ax1id | ⊢ (A ∈ ℂ → (A · 1) = A) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-c 5212 | . 2 ⊢ ℂ = (R × R) | |
| 2 | opreq1 3953 | . . 3 ⊢ (〈x, y〉 = A → (〈x, y〉 · 1) = (A · 1)) | |
| 3 | id 59 | . . 3 ⊢ (〈x, y〉 = A → 〈x, y〉 = A) | |
| 4 | 2, 3 | eqeq12d 1481 | . 2 ⊢ (〈x, y〉 = A → ((〈x, y〉 · 1) = 〈x, y〉 ↔ (A · 1) = A)) |
| 5 | 1r 5162 | . . . . . 6 ⊢ 1R ∈ R | |
| 6 | 0r 5161 | . . . . . 6 ⊢ 0R ∈ R | |
| 7 | 5, 6 | pm3.2i 285 | . . . . 5 ⊢ (1R ∈ R ⋀ 0R ∈ R) |
| 8 | mulcnsr 5226 | . . . . 5 ⊢ (((x ∈ R ⋀ y ∈ R) ⋀ (1R ∈ R ⋀ 0R ∈ R)) → (〈x, y〉 · 〈1R, 0R〉) = 〈((x ·R 1R) +R (-1R ·R (y ·R 0R))), ((y ·R 1R) +R (x ·R 0R))〉) | |
| 9 | 7, 8 | mpan2 694 | . . . 4 ⊢ ((x ∈ R ⋀ y ∈ R) → (〈x, y〉 · 〈1R, 0R〉) = 〈((x ·R 1R) +R (-1R ·R (y ·R 0R))), ((y ·R 1R) +R (x ·R 0R))〉) |
| 10 | 00sr 5180 | . . . . . . . . 9 ⊢ (y ∈ R → (y ·R 0R) = 0R) | |
| 11 | 10 | opreq2d 3961 | . . . . . . . 8 ⊢ (y ∈ R → (-1R ·R (y ·R 0R)) = (-1R ·R 0R)) |
| 12 | m1r 5163 | . . . . . . . . 9 ⊢ -1R ∈ R | |
| 13 | 00sr 5180 | . . . . . . . . 9 ⊢ (-1R ∈ R → (-1R ·R 0R) = 0R) | |
| 14 | 12, 13 | ax-mp 7 | . . . . . . . 8 ⊢ (-1R ·R 0R) = 0R |
| 15 | 11, 14 | syl6eq 1515 | . . . . . . 7 ⊢ (y ∈ R → (-1R ·R (y ·R 0R)) = 0R) |
| 16 | 15 | opreq2d 3961 | . . . . . 6 ⊢ (y ∈ R → ((x ·R 1R) +R (-1R ·R (y ·R 0R))) = ((x ·R 1R) +R 0R)) |
| 17 | 1idsr 5179 | . . . . . . . 8 ⊢ (x ∈ R → (x ·R 1R) = x) | |
| 18 | 17 | opreq1d 3960 | . . . . . . 7 ⊢ (x ∈ R → ((x ·R 1R) +R 0R) = (x +R 0R)) |
| 19 | 0idsr 5178 | . . . . . . 7 ⊢ (x ∈ R → (x +R 0R) = x) | |
| 20 | 18, 19 | eqtrd 1499 | . . . . . 6 ⊢ (x ∈ R → ((x ·R 1R) +R 0R) = x) |
| 21 | 16, 20 | sylan9eqr 1521 | . . . . 5 ⊢ ((x ∈ R ⋀ y ∈ R) → ((x ·R 1R) +R (-1R ·R (y ·R 0R))) = x) |
| 22 | 00sr 5180 | . . . . . . 7 ⊢ (x ∈ R → (x ·R 0R) = 0R) | |
| 23 | 22 | opreq2d 3961 | . . . . . 6 ⊢ (x ∈ R → ((y ·R 1R) +R (x ·R 0R)) = ((y ·R 1R) +R 0R)) |
| 24 | 1idsr 5179 | . . . . . . . 8 ⊢ (y ∈ R → (y ·R 1R) = y) | |
| 25 | 24 | opreq1d 3960 | . . . . . . 7 ⊢ (y ∈ R → ((y ·R 1R) +R 0R) = (y +R 0R)) |
| 26 | 0idsr 5178 | . . . . . . 7 ⊢ (y ∈ R → (y +R 0R) = y) | |
| 27 | 25, 26 | eqtrd 1499 | . . . . . 6 ⊢ (y ∈ R → ((y ·R 1R) +R 0R) = y) |
| 28 | 23, 27 | sylan9eq 1519 | . . . . 5 ⊢ ((x ∈ R ⋀ y ∈ R) → ((y ·R 1R) +R (x ·R 0R)) = y) |
| 29 | 21, 28 | opeq12d 2486 | . . . 4 ⊢ ((x ∈ R ⋀ y ∈ R) → 〈((x ·R 1R) +R (-1R ·R (y ·R 0R))), ((y ·R 1R) +R (x ·R 0R))〉 = 〈x, y〉) |
| 30 | 9, 29 | eqtrd 1499 | . . 3 ⊢ ((x ∈ R ⋀ y ∈ R) → (〈x, y〉 · 〈1R, 0R〉) = 〈x, y〉) |
| 31 | df-1 5214 | . . . 4 ⊢ 1 = 〈1R, 0R〉 | |
| 32 | 31 | opreq2i 3957 | . . 3 ⊢ (〈x, y〉 · 1) = (〈x, y〉 · 〈1R, 0R〉) |
| 33 | 30, 32 | syl5eq 1511 | . 2 ⊢ ((x ∈ R ⋀ y ∈ R) → (〈x, y〉 · 1) = 〈x, y〉) |
| 34 | 1, 4, 33 | optocl 3225 | 1 ⊢ (A ∈ ℂ → (A · 1) = A) |
| Colors of variables: wff set class |
| Syntax hints: → wi 3 ⋀ wa 223 = wceq 953 ∈ wcel 955 〈cop 2401 (class class class)co 3948 Rcnr 4965 0Rc0r 4966 1Rc1r 4967 -1Rcm1r 4968 +R cplr 4969 ·R cmr 4970 ℂcc 5204 1c1 5207 · cmul 5211 |
| This theorem is referenced by: mulid1t 5283 mulid1 5304 mulid2t 5389 muladd11t 5394 muleqaddt 5669 divadddivt 5740 divdivmult 5751 conjmult 5753 mulgt1t 5801 ltmulgt11t 5802 lemulge11t 5804 nnmulclt 5889 expaddt 6527 expmult 6528 sq01t 6582 bernneq 6583 crrecz 6672 imret 6710 facwordit 6881 faclbnd 6882 faclbnd2 6883 faclbnd4lem3 6887 faclbnd6 6891 facavgt 6892 bcn0t 6901 bcnp11t 6903 binomlem1 7004 binomlem4 7007 fnsmnt 7161 geoser 7169 efexpt 7314 efnn0valt 7315 cos01gt0 7419 abseft 7425 cnring 8099 nmoub3i 8368 ipasslem2 8422 ubthlem10 8469 htthlem6 8555 sinper 8609 cosper 8610 nmopub2tALT 9750 nmfnleub2t 9766 nmcopexlem5 9870 nmcfnexlem5 9899 nmopcoadj 9948 branmfnt 9951 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 959 ax-gen 960 ax-8 961 ax-9 962 ax-10 963 ax-11 964 ax-12 965 ax-13 966 ax-14 967 ax-17 968 ax-4 970 ax-5o 972 ax-6o 975 ax-9o 1119 ax-10o 1136 ax-16 1206 ax-11o 1213 ax-ext 1452 ax-rep 2683 ax-sep 2693 ax-nul 2700 ax-pow 2732 ax-pr 2769 ax-un 2857 ax-inf2 4597 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3or 774 df-3an 775 df-ex 978 df-sb 1168 df-eu 1375 df-mo 1376 df-clab 1457 df-cleq 1462 df-clel 1465 df-ne 1579 df-ral 1641 df-rex 1642 df-reu 1643 df-rab 1644 df-v 1803 df-sbc 1932 df-csb 1992 df-dif 2039 df-un 2040 df-in 2041 df-ss 2043 df-pss 2045 df-nul 2271 df-if 2352 df-pw 2392 df-sn 2402 df-pr 2403 df-tp 2405 df-op 2406 df-uni 2494 df-int 2524 df-iun 2558 df-br 2610 df-opab 2657 df-tr 2671 df-eprel 2821 df-id 2824 df-po 2831 df-so 2841 df-fr 2907 df-we 2924 df-ord 2941 df-on 2942 df-lim 2943 df-suc 2944 df-om 3122 df-xp 3174 df-rel 3175 df-cnv 3176 df-co 3177 df-dm 3178 df-rn 3179 df-res 3180 df-ima 3181 df-fun 3182 df-fn 3183 df-f 3184 df-fv 3188 df-rdg 3917 df-opr 3950 df-oprab 3951 df-1st 4063 df-2nd 4064 df-1o 4117 df-oadd 4119 df-omul 4120 df-er 4245 df-ec 4247 df-qs 4250 df-ni 4972 df-pli 4973 df-mi 4974 df-lti 4975 df-plpq 5007 df-mpq 5008 df-enq 5009 df-nq 5010 df-plq 5011 df-mq 5012 df-rq 5013 df-ltq 5014 df-1q 5015 df-np 5058 df-1p 5059 df-plp 5060 df-mp 5061 df-ltp 5062 df-plpr 5136 df-mpr 5137 df-enr 5138 df-nr 5139 df-plr 5140 df-mr 5141 df-0r 5143 df-1r 5144 df-m1r 5145 df-c 5212 df-1 5214 df-mul 5218 |