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| Mirrors > Home > MPE Home > Th. List > pnfge | Structured version Visualization version GIF version | ||
| Description: Plus infinity is an upper bound for extended reals. (Contributed by NM, 30-Jan-2006.) |
| Ref | Expression |
|---|---|
| pnfge | ⊢ (𝐴 ∈ ℝ* → 𝐴 ≤ +∞) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | pnfnlt 13171 | . 2 ⊢ (𝐴 ∈ ℝ* → ¬ +∞ < 𝐴) | |
| 2 | pnfxr 11280 | . . 3 ⊢ +∞ ∈ ℝ* | |
| 3 | xrlenlt 11291 | . . 3 ⊢ ((𝐴 ∈ ℝ* ∧ +∞ ∈ ℝ*) → (𝐴 ≤ +∞ ↔ ¬ +∞ < 𝐴)) | |
| 4 | 2, 3 | mpan2 704 | . 2 ⊢ (𝐴 ∈ ℝ* → (𝐴 ≤ +∞ ↔ ¬ +∞ < 𝐴)) |
| 5 | 1, 4 | mpbird 260 | 1 ⊢ (𝐴 ∈ ℝ* → 𝐴 ≤ +∞) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ wb 209 ∈ wcel 2146 class class class wbr 5111 +∞cpnf 11257 ℝ*cxr 11259 < clt 11260 ≤ cle 11261 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2148 ax-9 2156 ax-ext 2737 ax-sep 5259 ax-pow 5338 ax-pr 5406 ax-un 7742 ax-cnex 11173 ax-resscn 11174 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2744 df-cleq 2757 df-clel 2840 df-ne 2961 df-nel 3067 df-ral 3082 df-rex 3092 df-rab 3419 df-v 3459 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4287 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4875 df-br 5112 df-opab 5176 df-xp 5669 df-cnv 5671 df-pnf 11262 df-mnf 11263 df-xr 11264 df-ltxr 11265 df-le 11266 |
| This theorem is used by: pnfged 13174 xnn0n0n1ge2b 13175 0lepnf 13176 nltpnft 13208 xrre2 13214 xnn0lem1lt 13288 xleadd1a 13297 xlt2add 13304 xsubge0 13305 xlesubadd 13307 xlemul1a 13332 elicore 13443 elico2 13455 iccmax 13468 elxrge0 13502 nfile 14415 hashdom 14435 hashdomi 14436 hashge1 14445 hashss 14465 hashge2el2difr 14538 pcdvdsb 16953 pc2dvds 16963 pcaddlem 16972 xrsdsreclblem 21615 leordtvallem1 23419 lecldbas 23428 isxmet2d 24537 blssec 24645 nmoix 24939 nmoleub 24941 xrtgioo 25017 xrge0tsms 25045 metdstri 25062 nmoleub2lem 25326 ovolf 25694 ovollb2 25701 ovoliun 25717 ovolre 25737 voliunlem3 25764 volsup 25768 icombl 25776 ioombl 25777 ismbfd 25851 itg2seq 25954 dvfsumrlim 26243 dvfsumrlim2 26244 radcnvcl 26633 logfacbnd3 27440 log2sumbnd 27761 tgldimor 28824 xrdifh 33197 xrge0tsmsd 33459 unitssxrge0 34356 tpr2rico 34368 lmxrge0 34408 esumle 34514 esumlef 34518 esumpinfval 34529 esumpinfsum 34533 esumcvgsum 34544 ddemeas 34693 sxbrsigalem2 34743 omssubadd 34757 carsgclctunlem3 34777 signsply0 35005 ismblfin 38371 xrgepnfd 46107 supxrgelem 46113 supxrge 46114 infrpge 46127 xrlexaddrp 46128 infleinflem1 46145 infleinf 46147 infxrpnf 46220 ge0xrre 46307 iblsplit 46740 ismbl3 46760 ovolsplit 46762 sge0cl 47155 sge0less 47166 sge0pr 47168 sge0le 47181 sge0split 47183 carageniuncl 47297 ovnsubaddlem1 47344 hspmbl 47403 pgrpgt2nabl 49205 |
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