Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > 9nn | Structured version Visualization version GIF version |
Description: 9 is a positive integer. (Contributed by NM, 21-Oct-2012.) |
Ref | Expression |
---|---|
9nn | ⊢ 9 ∈ ℕ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-9 11710 | . 2 ⊢ 9 = (8 + 1) | |
2 | 8nn 11735 | . . 3 ⊢ 8 ∈ ℕ | |
3 | peano2nn 11652 | . . 3 ⊢ (8 ∈ ℕ → (8 + 1) ∈ ℕ) | |
4 | 2, 3 | ax-mp 5 | . 2 ⊢ (8 + 1) ∈ ℕ |
5 | 1, 4 | eqeltri 2911 | 1 ⊢ 9 ∈ ℕ |
Colors of variables: wff setvar class |
Syntax hints: ∈ wcel 2114 (class class class)co 7158 1c1 10540 + caddc 10542 ℕcn 11640 8c8 11701 9c9 11702 |
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 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2795 ax-sep 5205 ax-nul 5212 ax-pow 5268 ax-pr 5332 ax-un 7463 ax-1cn 10597 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3or 1084 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2802 df-cleq 2816 df-clel 2895 df-nfc 2965 df-ne 3019 df-ral 3145 df-rex 3146 df-reu 3147 df-rab 3149 df-v 3498 df-sbc 3775 df-csb 3886 df-dif 3941 df-un 3943 df-in 3945 df-ss 3954 df-pss 3956 df-nul 4294 df-if 4470 df-pw 4543 df-sn 4570 df-pr 4572 df-tp 4574 df-op 4576 df-uni 4841 df-iun 4923 df-br 5069 df-opab 5131 df-mpt 5149 df-tr 5175 df-id 5462 df-eprel 5467 df-po 5476 df-so 5477 df-fr 5516 df-we 5518 df-xp 5563 df-rel 5564 df-cnv 5565 df-co 5566 df-dm 5567 df-rn 5568 df-res 5569 df-ima 5570 df-pred 6150 df-ord 6196 df-on 6197 df-lim 6198 df-suc 6199 df-iota 6316 df-fun 6359 df-fn 6360 df-f 6361 df-f1 6362 df-fo 6363 df-f1o 6364 df-fv 6365 df-ov 7161 df-om 7583 df-wrecs 7949 df-recs 8010 df-rdg 8048 df-nn 11641 df-2 11703 df-3 11704 df-4 11705 df-5 11706 df-6 11707 df-7 11708 df-8 11709 df-9 11710 |
This theorem is referenced by: 9nn0 11924 9p1e10 12103 10nn 12117 3dvdsdec 15683 19prm 16453 prmlem2 16455 37prm 16456 43prm 16457 83prm 16458 139prm 16459 163prm 16460 317prm 16461 631prm 16462 1259lem1 16466 1259lem2 16467 1259lem3 16468 1259lem4 16469 1259lem5 16470 2503lem3 16474 tsetndx 16661 tsetid 16662 topgrpstr 16663 resstset 16667 otpsstr 16670 odrngstr 16681 imasvalstr 16727 ipostr 17765 oppgtset 18482 mgptset 19249 sratset 19958 psrvalstr 20145 cnfldstr 20549 eltpsg 21553 indistpsALT 21623 2logb9irr 25375 sqrt2cxp2logb9e3 25379 mcubic 25427 log2cnv 25524 log2tlbnd 25525 log2ublem2 25527 log2ub 25529 bposlem7 25868 ex-cnv 28218 ex-dm 28220 ex-gcd 28238 ex-lcm 28239 ex-prmo 28240 hgt750lem2 31925 rmydioph 39618 deccarry 43518 257prm 43730 fmtno4nprmfac193 43743 139prmALT 43766 127prm 43770 8exp8mod9 43908 9fppr8 43909 nfermltl8rev 43914 wtgoldbnnsum4prm 43974 bgoldbnnsum3prm 43976 bgoldbtbndlem1 43977 tgblthelfgott 43987 |
Copyright terms: Public domain | W3C validator |