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Mirrors > Home > ILE Home > Th. List > 9nn0 | GIF version |
Description: 9 is a nonnegative integer. (Contributed by Mario Carneiro, 19-Apr-2015.) |
Ref | Expression |
---|---|
9nn0 | ⊢ 9 ∈ ℕ0 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 9nn 8888 | . 2 ⊢ 9 ∈ ℕ | |
2 | 1 | nnnn0i 8985 | 1 ⊢ 9 ∈ ℕ0 |
Colors of variables: wff set class |
Syntax hints: ∈ wcel 1480 9c9 8778 ℕ0cn0 8977 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2121 ax-sep 4046 ax-cnex 7711 ax-resscn 7712 ax-1re 7714 ax-addrcl 7717 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ral 2421 df-rex 2422 df-v 2688 df-un 3075 df-in 3077 df-ss 3084 df-sn 3533 df-pr 3534 df-op 3536 df-uni 3737 df-int 3772 df-br 3930 df-iota 5088 df-fv 5131 df-ov 5777 df-inn 8721 df-2 8779 df-3 8780 df-4 8781 df-5 8782 df-6 8783 df-7 8784 df-8 8785 df-9 8786 df-n0 8978 |
This theorem is referenced by: deccl 9196 le9lt10 9208 decsucc 9222 9p2e11 9268 9p3e12 9269 9p4e13 9270 9p5e14 9271 9p6e15 9272 9p7e16 9273 9p8e17 9274 9p9e18 9275 9t3e27 9304 9t4e36 9305 9t5e45 9306 9t6e54 9307 9t7e63 9308 9t8e72 9309 9t9e81 9310 sq10e99m1 10460 3dvds2dec 11563 setsmsdsg 12649 |
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