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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 9290 | . 2 ⊢ 9 ∈ ℕ | |
| 2 | 1 | nnnn0i 9388 | 1 ⊢ 9 ∈ ℕ0 |
| Colors of variables: wff set class |
| Syntax hints: ∈ wcel 2200 9c9 9179 ℕ0cn0 9380 |
| 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 714 ax-5 1493 ax-7 1494 ax-gen 1495 ax-ie1 1539 ax-ie2 1540 ax-8 1550 ax-10 1551 ax-11 1552 ax-i12 1553 ax-bndl 1555 ax-4 1556 ax-17 1572 ax-i9 1576 ax-ial 1580 ax-i5r 1581 ax-ext 2211 ax-sep 4202 ax-cnex 8101 ax-resscn 8102 ax-1re 8104 ax-addrcl 8107 |
| This theorem depends on definitions: df-bi 117 df-3an 1004 df-tru 1398 df-nf 1507 df-sb 1809 df-clab 2216 df-cleq 2222 df-clel 2225 df-nfc 2361 df-ral 2513 df-rex 2514 df-v 2801 df-un 3201 df-in 3203 df-ss 3210 df-sn 3672 df-pr 3673 df-op 3675 df-uni 3889 df-int 3924 df-br 4084 df-iota 5278 df-fv 5326 df-ov 6010 df-inn 9122 df-2 9180 df-3 9181 df-4 9182 df-5 9183 df-6 9184 df-7 9185 df-8 9186 df-9 9187 df-n0 9381 |
| This theorem is referenced by: deccl 9603 le9lt10 9615 decsucc 9629 9p2e11 9675 9p3e12 9676 9p4e13 9677 9p5e14 9678 9p6e15 9679 9p7e16 9680 9p8e17 9681 9p9e18 9682 9t3e27 9711 9t4e36 9712 9t5e45 9713 9t6e54 9714 9t7e63 9715 9t8e72 9716 9t9e81 9717 sq10e99m1 10947 3dvds2dec 12392 2exp8 12973 dsndxntsetndx 13272 unifndxntsetndx 13279 setsmsdsg 15169 |
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