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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 6525 |
. 2
| |
| 2 | peano1 4660 |
. . 3
| |
| 3 | peano2 4661 |
. . 3
| |
| 4 | 2, 3 | ax-mp 5 |
. 2
|
| 5 | 1, 4 | eqeltri 2280 |
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 615 ax-in2 616 ax-io 711 ax-5 1471 ax-7 1472 ax-gen 1473 ax-ie1 1517 ax-ie2 1518 ax-8 1528 ax-10 1529 ax-11 1530 ax-i12 1531 ax-bndl 1533 ax-4 1534 ax-17 1550 ax-i9 1554 ax-ial 1558 ax-i5r 1559 ax-13 2180 ax-14 2181 ax-ext 2189 ax-sep 4178 ax-nul 4186 ax-pow 4234 ax-pr 4269 ax-un 4498 |
| This theorem depends on definitions: df-bi 117 df-3an 983 df-tru 1376 df-nf 1485 df-sb 1787 df-clab 2194 df-cleq 2200 df-clel 2203 df-nfc 2339 df-ral 2491 df-rex 2492 df-v 2778 df-dif 3176 df-un 3178 df-in 3180 df-ss 3187 df-nul 3469 df-pw 3628 df-sn 3649 df-pr 3650 df-uni 3865 df-int 3900 df-suc 4436 df-iom 4657 df-1o 6525 |
| This theorem is referenced by: 2onn 6630 nnm2 6635 nnaordex 6637 snfig 6930 snnen2og 6981 1nen2 6983 1ndom2 6987 unfiexmid 7041 en1eqsn 7076 omp1eomlem 7222 fodjum 7274 fodju0 7275 nninfdcinf 7299 nninfwlporlemd 7300 nninfwlporlem 7301 en2eleq 7334 en2other2 7335 exmidfodomrlemr 7341 exmidfodomrlemrALT 7342 1pi 7463 1lt2pi 7488 archnqq 7565 nq0m0r 7604 nq02m 7613 prarloclemlt 7641 prarloclemlo 7642 1tonninf 10623 hash2 10994 fnpr2o 13286 fvpr1o 13289 upgrfi 15813 012of 16130 2omap 16132 pwle2 16137 peano3nninf 16146 nninfall 16148 nninfsellemdc 16149 nninfsellemeq 16153 nninfsellemeqinf 16155 nninffeq 16159 sbthom 16167 isomninnlem 16171 iswomninnlem 16190 ismkvnnlem 16193 |
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