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Mirrors > Home > ILE Home > Th. List > ltdcpi | Unicode version |
Description: Less-than for positive integers is decidable. (Contributed by Jim Kingdon, 12-Dec-2019.) |
Ref | Expression |
---|---|
ltdcpi | DECID |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pinn 7117 | . . 3 | |
2 | pinn 7117 | . . 3 | |
3 | nndcel 6396 | . . 3 DECID | |
4 | 1, 2, 3 | syl2an 287 | . 2 DECID |
5 | ltpiord 7127 | . . 3 | |
6 | 5 | dcbid 823 | . 2 DECID DECID |
7 | 4, 6 | mpbird 166 | 1 DECID |
Colors of variables: wff set class |
Syntax hints: wi 4 wa 103 DECID wdc 819 wcel 1480 class class class wbr 3929 com 4504 cnpi 7080 clti 7083 |
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 2121 ax-sep 4046 ax-nul 4054 ax-pow 4098 ax-pr 4131 ax-un 4355 ax-setind 4452 ax-iinf 4502 |
This theorem depends on definitions: df-bi 116 df-dc 820 df-3or 963 df-3an 964 df-tru 1334 df-nf 1437 df-sb 1736 df-eu 2002 df-mo 2003 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ne 2309 df-ral 2421 df-rex 2422 df-v 2688 df-dif 3073 df-un 3075 df-in 3077 df-ss 3084 df-nul 3364 df-pw 3512 df-sn 3533 df-pr 3534 df-op 3536 df-uni 3737 df-int 3772 df-br 3930 df-opab 3990 df-tr 4027 df-eprel 4211 df-iord 4288 df-on 4290 df-suc 4293 df-iom 4505 df-xp 4545 df-ni 7112 df-lti 7115 |
This theorem is referenced by: ltdcnq 7205 |
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