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| Mirrors > Home > MPE Home > Th. List > ax1cn | Structured version Visualization version GIF version | ||
| Description: 1 is a complex number. Axiom 2 of 22 for real and complex numbers, derived from ZF set theory. This construction-dependent theorem should not be referenced directly; instead, use ax-1cn 11259. (Contributed by NM, 12-Apr-2007.) (New usage is discouraged.) |
| Ref | Expression |
|---|---|
| ax1cn | ⊢ 1 ∈ ℂ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | axresscn 11234 | . 2 ⊢ ℝ ⊆ ℂ | |
| 2 | df-1 11209 | . . 3 ⊢ 1 = 〈1R, 0R〉 | |
| 3 | 1sr 11167 | . . . 4 ⊢ 1R ∈ R | |
| 4 | opelreal 11216 | . . . 4 ⊢ (〈1R, 0R〉 ∈ ℝ ↔ 1R ∈ R) | |
| 5 | 3, 4 | mpbir 234 | . . 3 ⊢ 〈1R, 0R〉 ∈ ℝ |
| 6 | 2, 5 | eqeltri 2856 | . 2 ⊢ 1 ∈ ℝ |
| 7 | 1, 6 | sselii 3905 | 1 ⊢ 1 ∈ ℂ |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ∈ wcel 2144 〈cop 4589 Rcnr 10951 0Rc0r 10952 1Rc1r 10953 ℂcc 11199 ℝcr 11200 1c1 11202 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-10 2177 ax-11 2193 ax-12 2212 ax-ext 2732 ax-sep 5248 ax-nul 5259 ax-pow 5326 ax-pr 5390 ax-un 7751 ax-inf2 9643 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3or 1104 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-nf 1816 df-sb 2099 df-mo 2564 df-eu 2594 df-clab 2739 df-cleq 2752 df-clel 2835 df-nfc 2909 df-ne 2956 df-ral 3077 df-rex 3087 df-rmo 3365 df-reu 3366 df-rab 3413 df-v 3452 df-sbc 3739 df-csb 3847 df-ss 3896 df-pss 4014 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-pw 4558 df-sn 4584 df-pr 4586 df-op 4590 df-uni 4867 df-int 4907 df-iun 4952 df-br 5103 df-opab 5167 df-mpt 5186 df-tr 5212 df-id 5545 df-eprel 5550 df-po 5558 df-so 5559 df-fr 5603 df-we 5605 df-xp 5656 df-rel 5657 df-cnv 5658 df-co 5659 df-dm 5660 df-rn 5661 df-res 5662 df-ima 5663 df-pred 6304 df-ord 6365 df-on 6366 df-lim 6367 df-suc 6368 df-iota 6494 df-fun 6540 df-fn 6541 df-f 6542 df-f1 6543 df-fo 6544 df-f1o 6545 df-fv 6546 df-ov 7423 df-oprab 7424 df-mpo 7425 df-om 7878 df-1st 8001 df-2nd 8002 df-frecs 8300 df-wrecs 8331 df-recs 8380 df-rdg 8419 df-1o 8477 df-oadd 8481 df-omul 8482 df-er 8718 df-ec 8720 df-qs 8724 df-ni 10958 df-pli 10959 df-mi 10960 df-lti 10961 df-plpq 10994 df-mpq 10995 df-ltpq 10996 df-enq 10997 df-nq 10998 df-erq 10999 df-plq 11000 df-mq 11001 df-1nq 11002 df-rq 11003 df-ltnq 11004 df-np 11067 df-1p 11068 df-plp 11069 df-enr 11141 df-nr 11142 df-0r 11146 df-1r 11147 df-c 11207 df-1 11209 df-r 11211 |
| This theorem is used by: (None) |
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