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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 12161 and ax-resscn 11095 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 11096 | . 2 ⊢ 1 ∈ ℂ | |
| 2 | peano2cn 11317 | . . 3 ⊢ (𝑥 ∈ ℂ → (𝑥 + 1) ∈ ℂ) | |
| 3 | 2 | rgen 3054 | . 2 ⊢ ∀𝑥 ∈ ℂ (𝑥 + 1) ∈ ℂ |
| 4 | peano5nni 12160 | . 2 ⊢ ((1 ∈ ℂ ∧ ∀𝑥 ∈ ℂ (𝑥 + 1) ∈ ℂ) → ℕ ⊆ ℂ) | |
| 5 | 1, 3, 4 | mp2an 693 | 1 ⊢ ℕ ⊆ ℂ |
| Colors of variables: wff setvar class |
| Syntax hints: ∈ wcel 2114 ∀wral 3052 ⊆ wss 3903 (class class class)co 7368 ℂcc 11036 1c1 11039 + caddc 11041 ℕcn 12157 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-10 2147 ax-11 2163 ax-12 2185 ax-ext 2709 ax-sep 5243 ax-nul 5253 ax-pr 5379 ax-un 7690 ax-1cn 11096 ax-addcl 11098 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3or 1088 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-nf 1786 df-sb 2069 df-mo 2540 df-eu 2570 df-clab 2716 df-cleq 2729 df-clel 2812 df-nfc 2886 df-ne 2934 df-ral 3053 df-rex 3063 df-reu 3353 df-rab 3402 df-v 3444 df-sbc 3743 df-csb 3852 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-pss 3923 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-iun 4950 df-br 5101 df-opab 5163 df-mpt 5182 df-tr 5208 df-id 5527 df-eprel 5532 df-po 5540 df-so 5541 df-fr 5585 df-we 5587 df-xp 5638 df-rel 5639 df-cnv 5640 df-co 5641 df-dm 5642 df-rn 5643 df-res 5644 df-ima 5645 df-pred 6267 df-ord 6328 df-on 6329 df-lim 6330 df-suc 6331 df-iota 6456 df-fun 6502 df-fn 6503 df-f 6504 df-f1 6505 df-fo 6506 df-f1o 6507 df-fv 6508 df-ov 7371 df-om 7819 df-2nd 7944 df-frecs 8233 df-wrecs 8264 df-recs 8313 df-rdg 8351 df-nn 12158 |
| This theorem is referenced by: nnex 12163 nncn 12165 nncnd 12173 nn0sscn 12418 nn0addcl 12448 nn0mulcl 12449 dfz2 12519 nnexpcl 14009 fprodnncl 15890 nnrisefaccl 15954 znnen 16149 wunndx 17134 cmetcaulem 25256 mpodvdsmulf1o 27172 fsumdvdsmul 27173 dvdsmulf1o 27174 fsumdvdsmulOLD 27175 esumcvg 34264 eulerpartlemgs2 34558 fsum2dsub 34785 reprsuc 34793 nndivsub 36673 fsumnncl 45932 nnsgrpmgm 48536 nnsgrp 48537 nnsgrpnmnd 48538 |
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