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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 13058 | . 2 ⊢ (𝐴 ∈ ℝ* → ¬ +∞ < 𝐴) | |
2 | pnfxr 11218 | . . 3 ⊢ +∞ ∈ ℝ* | |
3 | xrlenlt 11229 | . . 3 ⊢ ((𝐴 ∈ ℝ* ∧ +∞ ∈ ℝ*) → (𝐴 ≤ +∞ ↔ ¬ +∞ < 𝐴)) | |
4 | 2, 3 | mpan2 689 | . 2 ⊢ (𝐴 ∈ ℝ* → (𝐴 ≤ +∞ ↔ ¬ +∞ < 𝐴)) |
5 | 1, 4 | mpbird 256 | 1 ⊢ (𝐴 ∈ ℝ* → 𝐴 ≤ +∞) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 205 ∈ wcel 2106 class class class wbr 5110 +∞cpnf 11195 ℝ*cxr 11197 < clt 11198 ≤ cle 11199 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-ext 2702 ax-sep 5261 ax-nul 5268 ax-pow 5325 ax-pr 5389 ax-un 7677 ax-cnex 11116 ax-resscn 11117 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 846 df-3an 1089 df-tru 1544 df-fal 1554 df-ex 1782 df-sb 2068 df-clab 2709 df-cleq 2723 df-clel 2809 df-ne 2940 df-nel 3046 df-ral 3061 df-rex 3070 df-rab 3406 df-v 3448 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4288 df-if 4492 df-pw 4567 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4871 df-br 5111 df-opab 5173 df-xp 5644 df-cnv 5646 df-pnf 11200 df-mnf 11201 df-xr 11202 df-ltxr 11203 df-le 11204 |
This theorem is referenced by: xnn0n0n1ge2b 13061 0lepnf 13062 nltpnft 13093 xrre2 13099 xnn0lem1lt 13173 xleadd1a 13182 xlt2add 13189 xsubge0 13190 xlesubadd 13192 xlemul1a 13217 elicore 13326 elico2 13338 iccmax 13350 elxrge0 13384 nfile 14269 hashdom 14289 hashdomi 14290 hashge1 14299 hashss 14319 hashge2el2difr 14392 pcdvdsb 16752 pc2dvds 16762 pcaddlem 16771 xrsdsreclblem 20880 leordtvallem1 22598 lecldbas 22607 isxmet2d 23717 blssec 23825 nmoix 24130 nmoleub 24132 xrtgioo 24206 xrge0tsms 24234 metdstri 24251 nmoleub2lem 24514 ovolf 24883 ovollb2 24890 ovoliun 24906 ovolre 24926 voliunlem3 24953 volsup 24957 icombl 24965 ioombl 24966 ismbfd 25040 itg2seq 25144 dvfsumrlim 25432 dvfsumrlim2 25433 radcnvcl 25813 xrlimcnp 26355 logfacbnd3 26608 log2sumbnd 26929 tgldimor 27507 xrdifh 31751 xrge0tsmsd 31969 unitssxrge0 32570 tpr2rico 32582 lmxrge0 32622 esumle 32746 esumlef 32750 esumpinfval 32761 esumpinfsum 32765 esumcvgsum 32776 ddemeas 32924 sxbrsigalem2 32975 omssubadd 32989 carsgclctunlem3 33009 signsply0 33252 ismblfin 36192 xrgepnfd 43686 supxrgelem 43692 supxrge 43693 infrpge 43706 xrlexaddrp 43707 infleinflem1 43725 infleinf 43727 infxrpnf 43801 pnfged 43829 ge0xrre 43889 iblsplit 44327 ismbl3 44347 ovolsplit 44349 sge0cl 44742 sge0less 44753 sge0pr 44755 sge0le 44768 sge0split 44770 carageniuncl 44884 ovnsubaddlem1 44931 hspmbl 44990 pimiooltgt 45071 pgrpgt2nabl 46562 |
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