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Mirrors > Home > ILE Home > Th. List > 1pi | Unicode version |
Description: Ordinal 'one' is a positive integer. (Contributed by NM, 29-Oct-1995.) |
Ref | Expression |
---|---|
1pi |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 1onn 6409 | . 2 | |
2 | 1n0 6322 | . 2 | |
3 | elni 7109 | . 2 | |
4 | 1, 2, 3 | mpbir2an 926 | 1 |
Colors of variables: wff set class |
Syntax hints: wcel 1480 wne 2306 c0 3358 com 4499 c1o 6299 cnpi 7073 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 105 ax-ia2 106 ax-ia3 107 ax-in1 603 ax-in2 604 ax-io 698 ax-5 1423 ax-7 1424 ax-gen 1425 ax-ie1 1469 ax-ie2 1470 ax-8 1482 ax-10 1483 ax-11 1484 ax-i12 1485 ax-bndl 1486 ax-4 1487 ax-13 1491 ax-14 1492 ax-17 1506 ax-i9 1510 ax-ial 1514 ax-i5r 1515 ax-ext 2119 ax-sep 4041 ax-nul 4049 ax-pow 4093 ax-pr 4126 ax-un 4350 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-clab 2124 df-cleq 2130 df-clel 2133 df-nfc 2268 df-ne 2307 df-ral 2419 df-rex 2420 df-v 2683 df-dif 3068 df-un 3070 df-in 3072 df-ss 3079 df-nul 3359 df-pw 3507 df-sn 3528 df-pr 3529 df-uni 3732 df-int 3767 df-suc 4288 df-iom 4500 df-1o 6306 df-ni 7105 |
This theorem is referenced by: mulidpi 7119 1lt2pi 7141 nlt1pig 7142 indpi 7143 1nq 7167 1qec 7189 mulidnq 7190 1lt2nq 7207 archnqq 7218 prarloclemarch 7219 prarloclemarch2 7220 nnnq 7223 ltnnnq 7224 nq0m0r 7257 nq0a0 7258 addpinq1 7265 nq02m 7266 prarloclemlt 7294 prarloclemlo 7295 prarloclemn 7300 prarloclemcalc 7303 nqprm 7343 caucvgprlemm 7469 caucvgprprlemml 7495 caucvgprprlemmu 7496 caucvgsrlemasr 7591 caucvgsr 7603 nntopi 7695 |
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