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| Mirrors > Home > ILE Home > Th. List > pnfge | Unicode version | ||
| Description: Plus infinity is an upper bound for extended reals. (Contributed by NM, 30-Jan-2006.) |
| Ref | Expression |
|---|---|
| pnfge |
|
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pnfnlt 10120 |
. 2
| |
| 2 | pnfxr 8326 |
. . 3
| |
| 3 | xrlenlt 8338 |
. . 3
| |
| 4 | 2, 3 | mpan2 425 |
. 2
|
| 5 | 1, 4 | mpbird 167 |
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 717 ax-5 1496 ax-7 1497 ax-gen 1498 ax-ie1 1542 ax-ie2 1543 ax-8 1553 ax-10 1554 ax-11 1555 ax-i12 1556 ax-bndl 1558 ax-4 1559 ax-17 1575 ax-i9 1579 ax-ial 1583 ax-i5r 1584 ax-13 2205 ax-14 2206 ax-ext 2214 ax-sep 4228 ax-pow 4287 ax-pr 4322 ax-un 4554 ax-cnex 8218 ax-resscn 8219 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1812 df-eu 2083 df-mo 2084 df-clab 2219 df-cleq 2225 df-clel 2228 df-nfc 2373 df-ne 2413 df-nel 2508 df-ral 2525 df-rex 2526 df-rab 2529 df-v 2815 df-dif 3213 df-un 3215 df-in 3217 df-ss 3224 df-pw 3671 df-sn 3695 df-pr 3696 df-op 3698 df-uni 3915 df-br 4110 df-opab 4172 df-xp 4755 df-cnv 4757 df-pnf 8310 df-mnf 8311 df-xr 8312 df-ltxr 8313 df-le 8314 |
| This theorem is referenced by: 0lepnf 10123 xnn0dcle 10135 xnn0letri 10136 xrre2 10154 xleadd1a 10206 xltadd1 10209 xlt2add 10213 xsubge0 10214 xlesubadd 10216 xleaddadd 10220 elico2 10270 iccmax 10282 elxrge0 10311 elicore 10626 xqltnle 10627 xrmaxifle 11931 xrmaxadd 11946 xrbdtri 11961 pcdvdsb 13018 pc2dvds 13028 pcaddlem 13037 isxmet2d 15213 blssec 15303 |
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