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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 12524 | . 2 ⊢ (𝐴 ∈ ℝ* → ¬ +∞ < 𝐴) | |
2 | pnfxr 10695 | . . 3 ⊢ +∞ ∈ ℝ* | |
3 | xrlenlt 10706 | . . 3 ⊢ ((𝐴 ∈ ℝ* ∧ +∞ ∈ ℝ*) → (𝐴 ≤ +∞ ↔ ¬ +∞ < 𝐴)) | |
4 | 2, 3 | mpan2 689 | . 2 ⊢ (𝐴 ∈ ℝ* → (𝐴 ≤ +∞ ↔ ¬ +∞ < 𝐴)) |
5 | 1, 4 | mpbird 259 | 1 ⊢ (𝐴 ∈ ℝ* → 𝐴 ≤ +∞) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 208 ∈ wcel 2114 class class class wbr 5066 +∞cpnf 10672 ℝ*cxr 10674 < clt 10675 ≤ cle 10676 |
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 1970 ax-7 2015 ax-8 2116 ax-9 2124 ax-10 2145 ax-11 2161 ax-12 2177 ax-ext 2793 ax-sep 5203 ax-nul 5210 ax-pow 5266 ax-pr 5330 ax-un 7461 ax-cnex 10593 ax-resscn 10594 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1540 df-ex 1781 df-nf 1785 df-sb 2070 df-mo 2622 df-eu 2654 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-dif 3939 df-un 3941 df-in 3943 df-ss 3952 df-nul 4292 df-if 4468 df-pw 4541 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4839 df-br 5067 df-opab 5129 df-xp 5561 df-cnv 5563 df-pnf 10677 df-mnf 10678 df-xr 10679 df-ltxr 10680 df-le 10681 |
This theorem is referenced by: xnn0n0n1ge2b 12527 0lepnf 12528 nltpnft 12558 xrre2 12564 xnn0lem1lt 12638 xleadd1a 12647 xlt2add 12654 xsubge0 12655 xlesubadd 12657 xlemul1a 12682 elicore 12790 elico2 12801 iccmax 12813 elxrge0 12846 nfile 13721 hashdom 13741 hashdomi 13742 hashge1 13751 hashss 13771 hashge2el2difr 13840 pcdvdsb 16205 pc2dvds 16215 pcaddlem 16224 xrsdsreclblem 20591 leordtvallem1 21818 lecldbas 21827 isxmet2d 22937 blssec 23045 nmoix 23338 nmoleub 23340 xrtgioo 23414 xrge0tsms 23442 metdstri 23459 nmoleub2lem 23718 ovolf 24083 ovollb2 24090 ovoliun 24106 ovolre 24126 voliunlem3 24153 volsup 24157 icombl 24165 ioombl 24166 ismbfd 24240 itg2seq 24343 dvfsumrlim 24628 dvfsumrlim2 24629 radcnvcl 25005 xrlimcnp 25546 logfacbnd3 25799 log2sumbnd 26120 tgldimor 26288 xrdifh 30503 xrge0tsmsd 30692 unitssxrge0 31143 tpr2rico 31155 lmxrge0 31195 esumle 31317 esumlef 31321 esumpinfval 31332 esumpinfsum 31336 esumcvgsum 31347 ddemeas 31495 sxbrsigalem2 31544 omssubadd 31558 carsgclctunlem3 31578 signsply0 31821 ismblfin 34948 xrgepnfd 41648 supxrgelem 41654 supxrge 41655 infrpge 41668 xrlexaddrp 41669 infleinflem1 41687 infleinf 41689 infxrpnf 41770 pnfged 41799 ge0xrre 41856 iblsplit 42300 ismbl3 42320 ovolsplit 42322 sge0cl 42712 sge0less 42723 sge0pr 42725 sge0le 42738 sge0split 42740 carageniuncl 42854 ovnsubaddlem1 42901 hspmbl 42960 pimiooltgt 43038 pgrpgt2nabl 44463 |
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