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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 8115. (Contributed by NM, 12-Apr-2007.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| ax1cn | ⊢ 1 ∈ ℂ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | axresscn 8070 | . 2 ⊢ ℝ ⊆ ℂ | |
| 2 | df-1 8030 | . . 3 ⊢ 1 = 〈1R, 0R〉 | |
| 3 | 1sr 7961 | . . . 4 ⊢ 1R ∈ R | |
| 4 | opelreal 8037 | . . . 4 ⊢ (〈1R, 0R〉 ∈ ℝ ↔ 1R ∈ R) | |
| 5 | 3, 4 | mpbir 146 | . . 3 ⊢ 〈1R, 0R〉 ∈ ℝ |
| 6 | 2, 5 | eqeltri 2302 | . 2 ⊢ 1 ∈ ℝ |
| 7 | 1, 6 | sselii 3222 | 1 ⊢ 1 ∈ ℂ |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2200 〈cop 3670 Rcnr 7507 0Rc0r 7508 1Rc1r 7509 ℂcc 8020 ℝcr 8021 1c1 8023 |
| 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 617 ax-in2 618 ax-io 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-13 2202 ax-14 2203 ax-ext 2211 ax-coll 4202 ax-sep 4205 ax-nul 4213 ax-pow 4262 ax-pr 4297 ax-un 4528 ax-setind 4633 ax-iinf 4684 |
| This theorem depends on definitions: df-bi 117 df-dc 840 df-3or 1003 df-3an 1004 df-tru 1398 df-fal 1401 df-nf 1507 df-sb 1809 df-eu 2080 df-mo 2081 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ne 2401 df-ral 2513 df-rex 2514 df-reu 2515 df-rab 2517 df-v 2802 df-sbc 3030 df-csb 3126 df-dif 3200 df-un 3202 df-in 3204 df-ss 3211 df-nul 3493 df-pw 3652 df-sn 3673 df-pr 3674 df-op 3676 df-uni 3892 df-int 3927 df-iun 3970 df-br 4087 df-opab 4149 df-mpt 4150 df-tr 4186 df-eprel 4384 df-id 4388 df-po 4391 df-iso 4392 df-iord 4461 df-on 4463 df-suc 4466 df-iom 4687 df-xp 4729 df-rel 4730 df-cnv 4731 df-co 4732 df-dm 4733 df-rn 4734 df-res 4735 df-ima 4736 df-iota 5284 df-fun 5326 df-fn 5327 df-f 5328 df-f1 5329 df-fo 5330 df-f1o 5331 df-fv 5332 df-ov 6016 df-oprab 6017 df-mpo 6018 df-1st 6298 df-2nd 6299 df-recs 6466 df-irdg 6531 df-1o 6577 df-2o 6578 df-oadd 6581 df-omul 6582 df-er 6697 df-ec 6699 df-qs 6703 df-ni 7514 df-pli 7515 df-mi 7516 df-lti 7517 df-plpq 7554 df-mpq 7555 df-enq 7557 df-nqqs 7558 df-plqqs 7559 df-mqqs 7560 df-1nqqs 7561 df-rq 7562 df-ltnqqs 7563 df-enq0 7634 df-nq0 7635 df-0nq0 7636 df-plq0 7637 df-mq0 7638 df-inp 7676 df-i1p 7677 df-iplp 7678 df-enr 7936 df-nr 7937 df-0r 7941 df-1r 7942 df-c 8028 df-1 8030 df-r 8032 |
| This theorem is referenced by: recriota 8100 |
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