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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 5220 | . 2 ⊢ ℂ = (R × R) | |
| 2 | opreq1 3959 | . . 3 ⊢ (〈x, y〉 = A → (〈x, y〉 · 1) = (A · 1)) | |
| 3 | id 59 | . . 3 ⊢ (〈x, y〉 = A → 〈x, y〉 = A) | |
| 4 | 2, 3 | eqeq12d 1486 | . 2 ⊢ (〈x, y〉 = A → ((〈x, y〉 · 1) = 〈x, y〉 ↔ (A · 1) = A)) |
| 5 | 1r 5170 | . . . . . 6 ⊢ 1R ∈ R | |
| 6 | 0r 5169 | . . . . . 6 ⊢ 0R ∈ R | |
| 7 | 5, 6 | pm3.2i 285 | . . . . 5 ⊢ (1R ∈ R ⋀ 0R ∈ R) |
| 8 | mulcnsr 5234 | . . . . 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 695 | . . . 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 5188 | . . . . . . . . 9 ⊢ (y ∈ R → (y ·R 0R) = 0R) | |
| 11 | 10 | opreq2d 3967 | . . . . . . . 8 ⊢ (y ∈ R → (-1R ·R (y ·R 0R)) = (-1R ·R 0R)) |
| 12 | m1r 5171 | . . . . . . . . 9 ⊢ -1R ∈ R | |
| 13 | 00sr 5188 | . . . . . . . . 9 ⊢ (-1R ∈ R → (-1R ·R 0R) = 0R) | |
| 14 | 12, 13 | ax-mp 7 | . . . . . . . 8 ⊢ (-1R ·R 0R) = 0R |
| 15 | 11, 14 | syl6eq 1520 | . . . . . . 7 ⊢ (y ∈ R → (-1R ·R (y ·R 0R)) = 0R) |
| 16 | 15 | opreq2d 3967 | . . . . . 6 ⊢ (y ∈ R → ((x ·R 1R) +R (-1R ·R (y ·R 0R))) = ((x ·R 1R) +R 0R)) |
| 17 | 1idsr 5187 | . . . . . . . 8 ⊢ (x ∈ R → (x ·R 1R) = x) | |
| 18 | 17 | opreq1d 3966 | . . . . . . 7 ⊢ (x ∈ R → ((x ·R 1R) +R 0R) = (x +R 0R)) |
| 19 | 0idsr 5186 | . . . . . . 7 ⊢ (x ∈ R → (x +R 0R) = x) | |
| 20 | 18, 19 | eqtrd 1504 | . . . . . 6 ⊢ (x ∈ R → ((x ·R 1R) +R 0R) = x) |
| 21 | 16, 20 | sylan9eqr 1526 | . . . . 5 ⊢ ((x ∈ R ⋀ y ∈ R) → ((x ·R 1R) +R (-1R ·R (y ·R 0R))) = x) |
| 22 | 00sr 5188 | . . . . . . 7 ⊢ (x ∈ R → (x ·R 0R) = 0R) | |
| 23 | 22 | opreq2d 3967 | . . . . . 6 ⊢ (x ∈ R → ((y ·R 1R) +R (x ·R 0R)) = ((y ·R 1R) +R 0R)) |
| 24 | 1idsr 5187 | . . . . . . . 8 ⊢ (y ∈ R → (y ·R 1R) = y) | |
| 25 | 24 | opreq1d 3966 | . . . . . . 7 ⊢ (y ∈ R → ((y ·R 1R) +R 0R) = (y +R 0R)) |
| 26 | 0idsr 5186 | . . . . . . 7 ⊢ (y ∈ R → (y +R 0R) = y) | |
| 27 | 25, 26 | eqtrd 1504 | . . . . . 6 ⊢ (y ∈ R → ((y ·R 1R) +R 0R) = y) |
| 28 | 23, 27 | sylan9eq 1524 | . . . . 5 ⊢ ((x ∈ R ⋀ y ∈ R) → ((y ·R 1R) +R (x ·R 0R)) = y) |
| 29 | 21, 28 | opeq12d 2491 | . . . 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 1504 | . . 3 ⊢ ((x ∈ R ⋀ y ∈ R) → (〈x, y〉 · 〈1R, 0R〉) = 〈x, y〉) |
| 31 | df-1 5222 | . . . 4 ⊢ 1 = 〈1R, 0R〉 | |
| 32 | 31 | opreq2i 3963 | . . 3 ⊢ (〈x, y〉 · 1) = (〈x, y〉 · 〈1R, 0R〉) |
| 33 | 30, 32 | syl5eq 1516 | . 2 ⊢ ((x ∈ R ⋀ y ∈ R) → (〈x, y〉 · 1) = 〈x, y〉) |
| 34 | 1, 4, 33 | optocl 3230 | 1 ⊢ (A ∈ ℂ → (A · 1) = A) |
| Colors of variables: wff set class |
| Syntax hints: → wi 3 ⋀ wa 223 = wceq 954 ∈ wcel 956 〈cop 2407 (class class class)co 3954 Rcnr 4973 0Rc0r 4974 1Rc1r 4975 -1Rcm1r 4976 +R cplr 4977 ·R cmr 4978 ℂcc 5212 1c1 5215 · cmul 5219 |
| This theorem is referenced by: mulid1t 5291 mulid1 5312 mulid2t 5397 muladd11t 5402 muleqaddt 5677 divadddivt 5748 divdivmult 5759 conjmult 5761 mulgt1t 5809 ltmulgt11t 5810 lemulge11t 5812 nnmulclt 5897 expaddt 6535 expmult 6536 sq01t 6590 bernneq 6591 crrecz 6680 imret 6718 facwordit 6889 faclbnd 6890 faclbnd2 6891 faclbnd4lem3 6895 faclbnd6 6899 facavgt 6900 bcn0t 6909 bcnp11t 6911 binomlem1 7012 binomlem4 7015 fnsmnt 7169 geoser 7177 efexpt 7322 efnn0valt 7323 cos01gt0 7427 abseft 7433 cnring 8114 nmoub3i 8381 ipasslem2 8435 ubthlem10 8482 htthlem6 8568 sinper 8628 cosper 8629 nmopub2tALT 9773 nmfnleub2t 9789 nmcopexlem5 9893 nmcfnexlem5 9922 nmopcoadj 9972 branmfnt 9976 |
| This theorem was proved from axioms: ax-1 4 ax-2 5 ax-3 6 ax-mp 7 ax-7 960 ax-gen 961 ax-8 962 ax-9 963 ax-10 964 ax-11 965 ax-12 966 ax-13 967 ax-14 968 ax-17 969 ax-4 971 ax-5o 973 ax-6o 976 ax-9o 1121 ax-10o 1138 ax-16 1208 ax-11o 1216 ax-ext 1457 ax-rep 2688 ax-sep 2698 ax-nul 2705 ax-pow 2737 ax-pr 2774 ax-un 2861 ax-inf2 4605 |
| This theorem depends on definitions: df-bi 147 df-or 224 df-an 225 df-3or 775 df-3an 776 df-ex 979 df-sb 1170 df-eu 1380 df-mo 1381 df-clab 1462 df-cleq 1467 df-clel 1470 df-ne 1584 df-ral 1646 df-rex 1647 df-reu 1648 df-rab 1649 df-v 1808 df-sbc 1938 df-csb 1998 df-dif 2045 df-un 2046 df-in 2047 df-ss 2049 df-pss 2051 df-nul 2277 df-if 2358 df-pw 2398 df-sn 2408 df-pr 2409 df-tp 2411 df-op 2412 df-uni 2499 df-int 2529 df-iun 2563 df-br 2615 df-opab 2662 df-tr 2676 df-eprel 2827 df-id 2830 df-po 2835 df-so 2845 df-fr 2912 df-we 2929 df-ord 2946 df-on 2947 df-lim 2948 df-suc 2949 df-om 3127 df-xp 3179 df-rel 3180 df-cnv 3181 df-co 3182 df-dm 3183 df-rn 3184 df-res 3185 df-ima 3186 df-fun 3187 df-fn 3188 df-f 3189 df-fv 3193 df-rdg 3923 df-opr 3956 df-oprab 3957 df-1st 4069 df-2nd 4070 df-1o 4123 df-oadd 4125 df-omul 4126 df-er 4251 df-ec 4253 df-qs 4256 df-ni 4980 df-pli 4981 df-mi 4982 df-lti 4983 df-plpq 5015 df-mpq 5016 df-enq 5017 df-nq 5018 df-plq 5019 df-mq 5020 df-rq 5021 df-ltq 5022 df-1q 5023 df-np 5066 df-1p 5067 df-plp 5068 df-mp 5069 df-ltp 5070 df-plpr 5144 df-mpr 5145 df-enr 5146 df-nr 5147 df-plr 5148 df-mr 5149 df-0r 5151 df-1r 5152 df-m1r 5153 df-c 5220 df-1 5222 df-mul 5226 |