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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 9311 | . 2 ⊢ 9 ∈ ℕ | |
| 2 | 1 | nnnn0i 9409 | 1 ⊢ 9 ∈ ℕ0 |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2202 9c9 9200 ℕ0cn0 9401 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-io 716 ax-5 1495 ax-7 1496 ax-gen 1497 ax-ie1 1541 ax-ie2 1542 ax-8 1552 ax-10 1553 ax-11 1554 ax-i12 1555 ax-bndl 1557 ax-4 1558 ax-17 1574 ax-i9 1578 ax-ial 1582 ax-i5r 1583 ax-ext 2213 ax-sep 4207 ax-cnex 8122 ax-resscn 8123 ax-1re 8125 ax-addrcl 8128 |
| This theorem depends on definitions: df-bi 117 df-3an 1006 df-tru 1400 df-nf 1509 df-sb 1811 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2363 df-ral 2515 df-rex 2516 df-v 2804 df-un 3204 df-in 3206 df-ss 3213 df-sn 3675 df-pr 3676 df-op 3678 df-uni 3894 df-int 3929 df-br 4089 df-iota 5286 df-fv 5334 df-ov 6020 df-inn 9143 df-2 9201 df-3 9202 df-4 9203 df-5 9204 df-6 9205 df-7 9206 df-8 9207 df-9 9208 df-n0 9402 |
| This theorem is referenced by: deccl 9624 le9lt10 9636 decsucc 9650 9p2e11 9696 9p3e12 9697 9p4e13 9698 9p5e14 9699 9p6e15 9700 9p7e16 9701 9p8e17 9702 9p9e18 9703 9t3e27 9732 9t4e36 9733 9t5e45 9734 9t6e54 9735 9t7e63 9736 9t8e72 9737 9t9e81 9738 sq10e99m1 10974 3dvds2dec 12426 2exp8 13007 dsndxntsetndx 13306 unifndxntsetndx 13313 setsmsdsg 15203 |
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