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| Mirrors > Home > ILE Home > Th. List > 1onn | Unicode version | ||
| Description: One is a natural number. (Contributed by NM, 29-Oct-1995.) |
| Ref | Expression |
|---|---|
| 1onn |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | df-1o 6562 |
. 2
| |
| 2 | peano1 4686 |
. . 3
| |
| 3 | peano2 4687 |
. . 3
| |
| 4 | 2, 3 | ax-mp 5 |
. 2
|
| 5 | 1, 4 | eqeltri 2302 |
1
|
| Colors of variables: wff set class |
| Syntax hints: |
| 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-in1 617 ax-in2 618 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-13 2202 ax-14 2203 ax-ext 2211 ax-sep 4202 ax-nul 4210 ax-pow 4258 ax-pr 4293 ax-un 4524 |
| 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-dif 3199 df-un 3201 df-in 3203 df-ss 3210 df-nul 3492 df-pw 3651 df-sn 3672 df-pr 3673 df-uni 3889 df-int 3924 df-suc 4462 df-iom 4683 df-1o 6562 |
| This theorem is referenced by: 2onn 6667 nnm2 6672 nnaordex 6674 snfig 6967 snnen2og 7020 1nen2 7022 1ndom2 7026 unfiexmid 7080 en1eqsn 7115 omp1eomlem 7261 fodjum 7313 fodju0 7314 nninfdcinf 7338 nninfwlporlemd 7339 nninfwlporlem 7340 en2eleq 7373 en2other2 7374 exmidfodomrlemr 7380 exmidfodomrlemrALT 7381 1pi 7502 1lt2pi 7527 archnqq 7604 nq0m0r 7643 nq02m 7652 prarloclemlt 7680 prarloclemlo 7681 1tonninf 10663 hash2 11034 fnpr2o 13372 fvpr1o 13375 upgrfi 15902 012of 16357 2omap 16359 pwle2 16364 peano3nninf 16373 nninfall 16375 nninfsellemdc 16376 nninfsellemeq 16380 nninfsellemeqinf 16382 nninffeq 16386 sbthom 16394 isomninnlem 16398 iswomninnlem 16417 ismkvnnlem 16420 |
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