Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > xnn0nemnf | Unicode version |
Description: No extended nonnegative integer equals negative infinity. (Contributed by AV, 10-Dec-2020.) |
Ref | Expression |
---|---|
xnn0nemnf | NN0* |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | elxnn0 9045 | . 2 NN0* | |
2 | nn0re 8989 | . . . 4 | |
3 | 2 | renemnfd 7820 | . . 3 |
4 | pnfnemnf 7823 | . . . 4 | |
5 | neeq1 2321 | . . . 4 | |
6 | 4, 5 | mpbiri 167 | . . 3 |
7 | 3, 6 | jaoi 705 | . 2 |
8 | 1, 7 | sylbi 120 | 1 NN0* |
Colors of variables: wff set class |
Syntax hints: wi 4 wo 697 wceq 1331 wcel 1480 wne 2308 cpnf 7800 cmnf 7801 cn0 8980 NN0*cxnn0 9043 |
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-pow 4098 ax-un 4355 ax-setind 4452 ax-cnex 7714 ax-resscn 7715 ax-1re 7717 ax-addrcl 7720 ax-rnegex 7732 |
This theorem depends on definitions: df-bi 116 df-3an 964 df-tru 1334 df-fal 1337 df-nf 1437 df-sb 1736 df-clab 2126 df-cleq 2132 df-clel 2135 df-nfc 2270 df-ne 2309 df-nel 2404 df-ral 2421 df-rex 2422 df-rab 2425 df-v 2688 df-dif 3073 df-un 3075 df-in 3077 df-ss 3084 df-pw 3512 df-sn 3533 df-pr 3534 df-uni 3737 df-int 3772 df-pnf 7805 df-mnf 7806 df-xr 7807 df-inn 8724 df-n0 8981 df-xnn0 9044 |
This theorem is referenced by: xnn0xrnemnf 9055 |
Copyright terms: Public domain | W3C validator |