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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 12147 and ax-resscn 11081 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 11082 | . 2 ⊢ 1 ∈ ℂ | |
| 2 | peano2cn 11303 | . . 3 ⊢ (𝑥 ∈ ℂ → (𝑥 + 1) ∈ ℂ) | |
| 3 | 2 | rgen 3051 | . 2 ⊢ ∀𝑥 ∈ ℂ (𝑥 + 1) ∈ ℂ |
| 4 | peano5nni 12146 | . 2 ⊢ ((1 ∈ ℂ ∧ ∀𝑥 ∈ ℂ (𝑥 + 1) ∈ ℂ) → ℕ ⊆ ℂ) | |
| 5 | 1, 3, 4 | mp2an 692 | 1 ⊢ ℕ ⊆ ℂ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2113 ∀wral 3049 ⊆ wss 3899 (class class class)co 7356 ℂcc 11022 1c1 11025 + caddc 11027 ℕcn 12143 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-10 2146 ax-11 2162 ax-12 2182 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pr 5375 ax-un 7678 ax-1cn 11082 ax-addcl 11084 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3or 1087 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-nf 1785 df-sb 2068 df-mo 2537 df-eu 2567 df-clab 2713 df-cleq 2726 df-clel 2809 df-nfc 2883 df-ne 2931 df-ral 3050 df-rex 3059 df-reu 3349 df-rab 3398 df-v 3440 df-sbc 3739 df-csb 3848 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-pss 3919 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-iun 4946 df-br 5097 df-opab 5159 df-mpt 5178 df-tr 5204 df-id 5517 df-eprel 5522 df-po 5530 df-so 5531 df-fr 5575 df-we 5577 df-xp 5628 df-rel 5629 df-cnv 5630 df-co 5631 df-dm 5632 df-rn 5633 df-res 5634 df-ima 5635 df-pred 6257 df-ord 6318 df-on 6319 df-lim 6320 df-suc 6321 df-iota 6446 df-fun 6492 df-fn 6493 df-f 6494 df-f1 6495 df-fo 6496 df-f1o 6497 df-fv 6498 df-ov 7359 df-om 7807 df-2nd 7932 df-frecs 8221 df-wrecs 8252 df-recs 8301 df-rdg 8339 df-nn 12144 |
| This theorem is referenced by: nnex 12149 nncn 12151 nncnd 12159 nn0sscn 12404 nn0addcl 12434 nn0mulcl 12435 dfz2 12505 nnexpcl 13995 fprodnncl 15876 nnrisefaccl 15940 znnen 16135 wunndx 17120 cmetcaulem 25242 mpodvdsmulf1o 27158 fsumdvdsmul 27159 dvdsmulf1o 27160 fsumdvdsmulOLD 27161 esumcvg 34192 eulerpartlemgs2 34486 fsum2dsub 34713 reprsuc 34721 nndivsub 36600 fsumnncl 45760 nnsgrpmgm 48364 nnsgrp 48365 nnsgrpnmnd 48366 |
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