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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 10083 |
. 2
| |
| 2 | pnfxr 8291 |
. . 3
| |
| 3 | xrlenlt 8303 |
. . 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 2204 ax-14 2205 ax-ext 2213 ax-sep 4212 ax-pow 4270 ax-pr 4305 ax-un 4536 ax-cnex 8183 ax-resscn 8184 |
| This theorem depends on definitions: df-bi 117 df-3an 1007 df-tru 1401 df-fal 1404 df-nf 1510 df-sb 1811 df-eu 2082 df-mo 2083 df-clab 2218 df-cleq 2224 df-clel 2227 df-nfc 2364 df-ne 2404 df-nel 2499 df-ral 2516 df-rex 2517 df-rab 2520 df-v 2805 df-dif 3203 df-un 3205 df-in 3207 df-ss 3214 df-pw 3658 df-sn 3679 df-pr 3680 df-op 3682 df-uni 3899 df-br 4094 df-opab 4156 df-xp 4737 df-cnv 4739 df-pnf 8275 df-mnf 8276 df-xr 8277 df-ltxr 8278 df-le 8279 |
| This theorem is referenced by: 0lepnf 10086 xnn0dcle 10098 xnn0letri 10099 xrre2 10117 xleadd1a 10169 xltadd1 10172 xlt2add 10176 xsubge0 10177 xlesubadd 10179 xleaddadd 10183 elico2 10233 iccmax 10245 elxrge0 10274 elicore 10589 xqltnle 10590 xrmaxifle 11886 xrmaxadd 11901 xrbdtri 11916 pcdvdsb 12973 pc2dvds 12983 pcaddlem 12992 isxmet2d 15159 blssec 15249 |
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