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| Mirrors > Home > ILE Home > Th. List > ax1cn | GIF version | ||
| Description: 1 is a complex number. Axiom for real and complex numbers, derived from set theory. This construction-dependent theorem should not be referenced directly; instead, use ax-1cn 7989. (Contributed by NM, 12-Apr-2007.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| ax1cn | ⊢ 1 ∈ ℂ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | axresscn 7944 | . 2 ⊢ ℝ ⊆ ℂ | |
| 2 | df-1 7904 | . . 3 ⊢ 1 = 〈1R, 0R〉 | |
| 3 | 1sr 7835 | . . . 4 ⊢ 1R ∈ R | |
| 4 | opelreal 7911 | . . . 4 ⊢ (〈1R, 0R〉 ∈ ℝ ↔ 1R ∈ R) | |
| 5 | 3, 4 | mpbir 146 | . . 3 ⊢ 〈1R, 0R〉 ∈ ℝ |
| 6 | 2, 5 | eqeltri 2269 | . 2 ⊢ 1 ∈ ℝ |
| 7 | 1, 6 | sselii 3181 | 1 ⊢ 1 ∈ ℂ |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2167 〈cop 3626 Rcnr 7381 0Rc0r 7382 1Rc1r 7383 ℂcc 7894 ℝcr 7895 1c1 7897 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-in1 615 ax-in2 616 ax-io 710 ax-5 1461 ax-7 1462 ax-gen 1463 ax-ie1 1507 ax-ie2 1508 ax-8 1518 ax-10 1519 ax-11 1520 ax-i12 1521 ax-bndl 1523 ax-4 1524 ax-17 1540 ax-i9 1544 ax-ial 1548 ax-i5r 1549 ax-13 2169 ax-14 2170 ax-ext 2178 ax-coll 4149 ax-sep 4152 ax-nul 4160 ax-pow 4208 ax-pr 4243 ax-un 4469 ax-setind 4574 ax-iinf 4625 |
| This theorem depends on definitions: df-bi 117 df-dc 836 df-3or 981 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1475 df-sb 1777 df-eu 2048 df-mo 2049 df-clab 2183 df-cleq 2189 df-clel 2192 df-nfc 2328 df-ne 2368 df-ral 2480 df-rex 2481 df-reu 2482 df-rab 2484 df-v 2765 df-sbc 2990 df-csb 3085 df-dif 3159 df-un 3161 df-in 3163 df-ss 3170 df-nul 3452 df-pw 3608 df-sn 3629 df-pr 3630 df-op 3632 df-uni 3841 df-int 3876 df-iun 3919 df-br 4035 df-opab 4096 df-mpt 4097 df-tr 4133 df-eprel 4325 df-id 4329 df-po 4332 df-iso 4333 df-iord 4402 df-on 4404 df-suc 4407 df-iom 4628 df-xp 4670 df-rel 4671 df-cnv 4672 df-co 4673 df-dm 4674 df-rn 4675 df-res 4676 df-ima 4677 df-iota 5220 df-fun 5261 df-fn 5262 df-f 5263 df-f1 5264 df-fo 5265 df-f1o 5266 df-fv 5267 df-ov 5928 df-oprab 5929 df-mpo 5930 df-1st 6207 df-2nd 6208 df-recs 6372 df-irdg 6437 df-1o 6483 df-2o 6484 df-oadd 6487 df-omul 6488 df-er 6601 df-ec 6603 df-qs 6607 df-ni 7388 df-pli 7389 df-mi 7390 df-lti 7391 df-plpq 7428 df-mpq 7429 df-enq 7431 df-nqqs 7432 df-plqqs 7433 df-mqqs 7434 df-1nqqs 7435 df-rq 7436 df-ltnqqs 7437 df-enq0 7508 df-nq0 7509 df-0nq0 7510 df-plq0 7511 df-mq0 7512 df-inp 7550 df-i1p 7551 df-iplp 7552 df-enr 7810 df-nr 7811 df-0r 7815 df-1r 7816 df-c 7902 df-1 7904 df-r 7906 |
| This theorem is referenced by: recriota 7974 |
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