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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 6582 |
. 2
| |
| 2 | peano1 4692 |
. . 3
| |
| 3 | peano2 4693 |
. . 3
| |
| 4 | 2, 3 | ax-mp 5 |
. 2
|
| 5 | 1, 4 | eqeltri 2304 |
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 619 ax-in2 620 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-13 2204 ax-14 2205 ax-ext 2213 ax-sep 4207 ax-nul 4215 ax-pow 4264 ax-pr 4299 ax-un 4530 |
| 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-dif 3202 df-un 3204 df-in 3206 df-ss 3213 df-nul 3495 df-pw 3654 df-sn 3675 df-pr 3676 df-uni 3894 df-int 3929 df-suc 4468 df-iom 4689 df-1o 6582 |
| This theorem is referenced by: 2onn 6689 nnm2 6694 nnaordex 6696 snfig 6989 snnen2og 7045 1nen2 7047 1ndom2 7051 unfiexmid 7110 en1eqsn 7147 omp1eomlem 7293 fodjum 7345 fodju0 7346 nninfdcinf 7370 nninfwlporlemd 7371 nninfwlporlem 7372 en2eleq 7406 en2other2 7407 exmidfodomrlemr 7413 exmidfodomrlemrALT 7414 1pi 7535 1lt2pi 7560 archnqq 7637 nq0m0r 7676 nq02m 7685 prarloclemlt 7713 prarloclemlo 7714 1tonninf 10704 en1hash 11063 hash2 11077 fnpr2o 13440 fvpr1o 13443 upgrfi 15972 012of 16643 2omap 16645 pwle2 16650 peano3nninf 16660 nninfall 16662 nninfsellemdc 16663 nninfsellemeq 16667 nninfsellemeqinf 16669 nninffeq 16673 sbthom 16681 isomninnlem 16685 iswomninnlem 16705 ismkvnnlem 16708 |
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