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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 13042 | . 2 ⊢ (𝐴 ∈ ℝ* → ¬ +∞ < 𝐴) | |
| 2 | pnfxr 11186 | . . 3 ⊢ +∞ ∈ ℝ* | |
| 3 | xrlenlt 11197 | . . 3 ⊢ ((𝐴 ∈ ℝ* ∧ +∞ ∈ ℝ*) → (𝐴 ≤ +∞ ↔ ¬ +∞ < 𝐴)) | |
| 4 | 2, 3 | mpan2 691 | . 2 ⊢ (𝐴 ∈ ℝ* → (𝐴 ≤ +∞ ↔ ¬ +∞ < 𝐴)) |
| 5 | 1, 4 | mpbird 257 | 1 ⊢ (𝐴 ∈ ℝ* → 𝐴 ≤ +∞) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∈ wcel 2113 class class class wbr 5098 +∞cpnf 11163 ℝ*cxr 11165 < clt 11166 ≤ cle 11167 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2115 ax-9 2123 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pow 5310 ax-pr 5377 ax-un 7680 ax-cnex 11082 ax-resscn 11083 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2715 df-cleq 2728 df-clel 2811 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3061 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-in 3908 df-ss 3918 df-nul 4286 df-if 4480 df-pw 4556 df-sn 4581 df-pr 4583 df-op 4587 df-uni 4864 df-br 5099 df-opab 5161 df-xp 5630 df-cnv 5632 df-pnf 11168 df-mnf 11169 df-xr 11170 df-ltxr 11171 df-le 11172 |
| This theorem is referenced by: pnfged 13045 xnn0n0n1ge2b 13046 0lepnf 13047 nltpnft 13079 xrre2 13085 xnn0lem1lt 13159 xleadd1a 13168 xlt2add 13175 xsubge0 13176 xlesubadd 13178 xlemul1a 13203 elicore 13314 elico2 13326 iccmax 13339 elxrge0 13373 nfile 14282 hashdom 14302 hashdomi 14303 hashge1 14312 hashss 14332 hashge2el2difr 14404 pcdvdsb 16797 pc2dvds 16807 pcaddlem 16816 xrsdsreclblem 21367 leordtvallem1 23154 lecldbas 23163 isxmet2d 24271 blssec 24379 nmoix 24673 nmoleub 24675 xrtgioo 24751 xrge0tsms 24779 metdstri 24796 nmoleub2lem 25070 ovolf 25439 ovollb2 25446 ovoliun 25462 ovolre 25482 voliunlem3 25509 volsup 25513 icombl 25521 ioombl 25522 ismbfd 25596 itg2seq 25699 dvfsumrlim 25994 dvfsumrlim2 25995 radcnvcl 26382 logfacbnd3 27190 log2sumbnd 27511 tgldimor 28574 xrdifh 32860 xrge0tsmsd 33155 unitssxrge0 34057 tpr2rico 34069 lmxrge0 34109 esumle 34215 esumlef 34219 esumpinfval 34230 esumpinfsum 34234 esumcvgsum 34245 ddemeas 34393 sxbrsigalem2 34443 omssubadd 34457 carsgclctunlem3 34477 signsply0 34708 ismblfin 37862 xrgepnfd 45576 supxrgelem 45582 supxrge 45583 infrpge 45596 xrlexaddrp 45597 infleinflem1 45614 infleinf 45616 infxrpnf 45690 ge0xrre 45777 iblsplit 46210 ismbl3 46230 ovolsplit 46232 sge0cl 46625 sge0less 46636 sge0pr 46638 sge0le 46651 sge0split 46653 carageniuncl 46767 ovnsubaddlem1 46814 hspmbl 46873 pgrpgt2nabl 48612 |
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