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Mirrors > Home > ILE Home > Th. List > 1nn0 | GIF version |
Description: 1 is a nonnegative integer. (Contributed by Raph Levien, 10-Dec-2002.) |
Ref | Expression |
---|---|
1nn0 | ⊢ 1 ∈ ℕ0 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 1nn 8050 | . 2 ⊢ 1 ∈ ℕ | |
2 | 1 | nnnn0i 8296 | 1 ⊢ 1 ∈ ℕ0 |
Colors of variables: wff set class |
Syntax hints: ∈ wcel 1433 1c1 6982 ℕ0cn0 8288 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 ax-io 662 ax-5 1376 ax-7 1377 ax-gen 1378 ax-ie1 1422 ax-ie2 1423 ax-8 1435 ax-10 1436 ax-11 1437 ax-i12 1438 ax-bndl 1439 ax-4 1440 ax-17 1459 ax-i9 1463 ax-ial 1467 ax-i5r 1468 ax-ext 2063 ax-1re 7070 |
This theorem depends on definitions: df-bi 115 df-tru 1287 df-nf 1390 df-sb 1686 df-clab 2068 df-cleq 2074 df-clel 2077 df-nfc 2208 df-ral 2353 df-v 2603 df-un 2977 df-in 2979 df-ss 2986 df-int 3637 df-inn 8040 df-n0 8289 |
This theorem is referenced by: peano2nn0 8328 deccl 8491 10nn0 8494 numsucc 8516 numadd 8523 numaddc 8524 11multnc 8544 6p5lem 8546 6p6e12 8550 7p5e12 8553 8p4e12 8558 9p2e11 8563 9p3e12 8564 10p10e20 8571 4t4e16 8575 5t2e10 8576 5t4e20 8578 6t3e18 8581 6t4e24 8582 7t3e21 8586 7t4e28 8587 8t3e24 8592 9t3e27 8599 9t9e81 8605 nn01to3 8702 elfzom1elp1fzo 9211 fzo0sn0fzo1 9230 expn1ap0 9486 nn0expcl 9490 sqval 9534 sq10 9640 nn0opthlem1d 9647 fac2 9658 bccl 9694 dvds1 10253 3dvds2dec 10265 1kp2ke3k 10562 ex-fac 10565 |
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