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Mirrors > Home > MPE Home > Th. List > 8nn | Structured version Visualization version GIF version |
Description: 8 is a positive integer. (Contributed by Mario Carneiro, 15-Sep-2013.) |
Ref | Expression |
---|---|
8nn | ⊢ 8 ∈ ℕ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-8 10962 | . 2 ⊢ 8 = (7 + 1) | |
2 | 7nn 11067 | . . 3 ⊢ 7 ∈ ℕ | |
3 | peano2nn 10909 | . . 3 ⊢ (7 ∈ ℕ → (7 + 1) ∈ ℕ) | |
4 | 2, 3 | ax-mp 5 | . 2 ⊢ (7 + 1) ∈ ℕ |
5 | 1, 4 | eqeltri 2684 | 1 ⊢ 8 ∈ ℕ |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 1977 (class class class)co 6549 1c1 9816 + caddc 9818 ℕcn 10897 7c7 10952 8c8 10953 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-1cn 9873 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3or 1032 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-ral 2901 df-rex 2902 df-reu 2903 df-rab 2905 df-v 3175 df-sbc 3403 df-csb 3500 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-pss 3556 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-tp 4130 df-op 4132 df-uni 4373 df-iun 4457 df-br 4584 df-opab 4644 df-mpt 4645 df-tr 4681 df-eprel 4949 df-id 4953 df-po 4959 df-so 4960 df-fr 4997 df-we 4999 df-xp 5044 df-rel 5045 df-cnv 5046 df-co 5047 df-dm 5048 df-rn 5049 df-res 5050 df-ima 5051 df-pred 5597 df-ord 5643 df-on 5644 df-lim 5645 df-suc 5646 df-iota 5768 df-fun 5806 df-fn 5807 df-f 5808 df-f1 5809 df-fo 5810 df-f1o 5811 df-fv 5812 df-ov 6552 df-om 6958 df-wrecs 7294 df-recs 7355 df-rdg 7393 df-nn 10898 df-2 10956 df-3 10957 df-4 10958 df-5 10959 df-6 10960 df-7 10961 df-8 10962 |
This theorem is referenced by: 9nn 11069 8nn0 11192 37prm 15666 43prm 15667 83prm 15668 317prm 15671 1259lem4 15679 1259lem5 15680 2503prm 15685 4001prm 15690 ipndx 15845 ipid 15846 ipsstr 15847 ressip 15856 phlstr 15857 tngip 22261 quart1cl 24381 quart1lem 24382 quart1 24383 log2tlbnd 24472 bposlem8 24816 lgsdir2lem2 24851 lgsdir2lem3 24852 2lgslem3a1 24925 2lgslem3b1 24926 2lgslem3c1 24927 2lgslem3d1 24928 2lgslem4 24931 2lgsoddprmlem2 24934 pntlemr 25091 pntlemj 25092 edgfndxnn 25669 edgfndxid 25670 baseltedgf 25671 struct2griedg 25705 uhgrstrrepe 25745 ex-prmo 26708 rmydioph 36599 fmtnoprmfac2lem1 40016 127prm 40053 mod42tp1mod8 40057 8even 40160 nnsum4primesevenALTV 40217 wtgoldbnnsum4prm 40218 bgoldbnnsum3prm 40220 bgoldbtbndlem1 40221 tgblthelfgott 40229 tgoldbachlt 40230 bgoldbachltOLD 40234 tgblthelfgottOLD 40236 tgoldbachltOLD 40237 |
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