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| Mirrors > Home > MPE Home > Th. List > nnsscn | Structured version Visualization version GIF version | ||
| Description: The positive integers are a subset of the complex numbers. Remark: this could also be proven from nnssre 12233 and ax-resscn 11153 at the cost of using more axioms. (Contributed by NM, 2-Aug-2004.) Reduce dependencies on axioms. (Revised by Steven Nguyen, 4-Oct-2022.) |
| Ref | Expression |
|---|---|
| nnsscn | ⊢ ℕ ⊆ ℂ |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | ax-1cn 11154 | . 2 ⊢ 1 ∈ ℂ | |
| 2 | peano2cn 11378 | . . 3 ⊢ (𝑥 ∈ ℂ → (𝑥 + 1) ∈ ℂ) | |
| 3 | 2 | rgen 3087 | . 2 ⊢ ∀𝑥 ∈ ℂ (𝑥 + 1) ∈ ℂ |
| 4 | peano5nni 12232 | . 2 ⊢ ((1 ∈ ℂ ∧ ∀𝑥 ∈ ℂ (𝑥 + 1) ∈ ℂ) → ℕ ⊆ ℂ) | |
| 5 | 1, 3, 4 | mp2an 704 | 1 ⊢ ℕ ⊆ ℂ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2149 ∀wral 3085 ⊆ wss 3913 (class class class)co 7408 ℂcc 11094 1c1 11097 + caddc 11099 ℕcn 12229 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-10 2182 ax-11 2198 ax-12 2219 ax-ext 2741 ax-sep 5258 ax-nul 5268 ax-pr 5402 ax-un 7730 ax-1cn 11154 ax-addcl 11156 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3or 1102 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-nf 1811 df-sb 2098 df-mo 2573 df-eu 2603 df-clab 2748 df-cleq 2761 df-clel 2844 df-nfc 2918 df-ne 2965 df-ral 3086 df-rex 3096 df-reu 3377 df-rab 3424 df-v 3465 df-sbc 3754 df-csb 3862 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-pss 3933 df-nul 4295 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-iun 4959 df-br 5111 df-opab 5175 df-mpt 5194 df-tr 5220 df-id 5554 df-eprel 5559 df-po 5567 df-so 5568 df-fr 5612 df-we 5614 df-xp 5665 df-rel 5666 df-cnv 5667 df-co 5668 df-dm 5669 df-rn 5670 df-res 5671 df-ima 5672 df-pred 6300 df-ord 6361 df-on 6362 df-lim 6363 df-suc 6364 df-iota 6490 df-fun 6536 df-fn 6537 df-f 6538 df-f1 6539 df-fo 6540 df-f1o 6541 df-fv 6542 df-ov 7411 df-om 7859 df-2nd 7983 df-frecs 8274 df-wrecs 8305 df-recs 8354 df-rdg 8393 df-nn 12230 |
| This theorem is referenced by: nnex 12235 nncn 12237 nncnd 12245 nn0sscn 12505 nn0addcl 12535 nn0mulcl 12536 dfz2 12606 nnexpcl 14106 fprodnncl 16005 nnrisefaccl 16069 znnen 16264 wunndx 17251 cmetcaulem 25412 mpodvdsmulf1o 27320 fsumdvdsmul 27321 dvdsmulf1o 27322 esumcvg 34417 eulerpartlemgs2 34711 fsum2dsub 34935 reprsuc 34943 nndivsub 36853 fsumnncl 46175 nnsgrpmgm 48825 nnsgrp 48826 nnsgrpnmnd 48827 |
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