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Mirrors > Home > ILE Home > Th. List > pnfnemnf | Unicode version |
Description: Plus and minus infinity are different elements of . (Contributed by NM, 14-Oct-2005.) |
Ref | Expression |
---|---|
pnfnemnf |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pnfxr 7818 | . . . 4 | |
2 | pwne 4084 | . . . 4 | |
3 | 1, 2 | ax-mp 5 | . . 3 |
4 | 3 | necomi 2393 | . 2 |
5 | df-mnf 7803 | . 2 | |
6 | 4, 5 | neeqtrri 2337 | 1 |
Colors of variables: wff set class |
Syntax hints: wcel 1480 wne 2308 cpw 3510 cpnf 7797 cmnf 7798 cxr 7799 |
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-cnex 7711 |
This theorem depends on definitions: df-bi 116 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-rex 2422 df-rab 2425 df-v 2688 df-un 3075 df-in 3077 df-ss 3084 df-pw 3512 df-sn 3533 df-pr 3534 df-uni 3737 df-pnf 7802 df-mnf 7803 df-xr 7804 |
This theorem is referenced by: mnfnepnf 7821 xnn0nemnf 9051 xrnemnf 9564 xrltnr 9566 pnfnlt 9573 nltmnf 9574 ngtmnft 9600 xrmnfdc 9626 xaddpnf1 9629 xaddnemnf 9640 xposdif 9665 xleaddadd 9670 |
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