![]() |
Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
|
Mirrors > Home > MPE Home > Th. List > 7nn | Structured version Visualization version GIF version |
Description: 7 is a positive integer. (Contributed by Mario Carneiro, 15-Sep-2013.) |
Ref | Expression |
---|---|
7nn | ⊢ 7 ∈ ℕ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-7 10961 | . 2 ⊢ 7 = (6 + 1) | |
2 | 6nn 11066 | . . 3 ⊢ 6 ∈ ℕ | |
3 | peano2nn 10909 | . . 3 ⊢ (6 ∈ ℕ → (6 + 1) ∈ ℕ) | |
4 | 2, 3 | ax-mp 5 | . 2 ⊢ (6 + 1) ∈ ℕ |
5 | 1, 4 | eqeltri 2684 | 1 ⊢ 7 ∈ ℕ |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 1977 (class class class)co 6549 1c1 9816 + caddc 9818 ℕcn 10897 6c6 10951 7c7 10952 |
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 |
This theorem is referenced by: 8nn 11068 7nn0 11191 7prm 15655 17prm 15662 prmlem2 15665 37prm 15666 43prm 15667 83prm 15668 139prm 15669 163prm 15670 317prm 15671 631prm 15672 1259prm 15681 mcubic 24374 cubic2 24375 cubic 24376 quartlem1 24384 quartlem2 24385 log2ublem1 24473 log2ublem2 24474 log2ub 24476 lgsdir2lem3 24852 lngndx 25140 lngid 25142 ttgval 25555 ttglem 25556 eengstr 25660 ex-xp 26685 ex-mod 26698 ex-prmo 26708 rmydioph 36599 expdiophlem2 36607 257prm 40011 fmtno5nprm 40033 139prmALT 40049 127prm 40053 nnsum3primesle9 40210 bgoldbtbndlem1 40221 tgoldbach 40232 tgoldbachOLD 40239 |
Copyright terms: Public domain | W3C validator |