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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 13180 | . 2 ⊢ (𝐴 ∈ ℝ* → ¬ +∞ < 𝐴) | |
| 2 | pnfxr 11288 | . . 3 ⊢ +∞ ∈ ℝ* | |
| 3 | xrlenlt 11299 | . . 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 2145 class class class wbr 5103 +∞cpnf 11265 ℝ*cxr 11267 < clt 11268 ≤ cle 11269 |
| 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 2147 ax-9 2155 ax-ext 2732 ax-sep 5251 ax-pow 5330 ax-pr 5398 ax-un 7737 ax-cnex 11181 ax-resscn 11182 |
| 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 2739 df-cleq 2752 df-clel 2835 df-ne 2956 df-nel 3062 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-pw 4559 df-sn 4585 df-pr 4587 df-op 4591 df-uni 4868 df-br 5104 df-opab 5168 df-xp 5661 df-cnv 5663 df-pnf 11270 df-mnf 11271 df-xr 11272 df-ltxr 11273 df-le 11274 |
| This theorem is used by: pnfged 13183 xnn0n0n1ge2b 13184 0lepnf 13185 nltpnft 13217 xrre2 13223 xnn0lem1lt 13297 xleadd1a 13306 xlt2add 13313 xsubge0 13314 xlesubadd 13316 xlemul1a 13341 elicore 13452 elico2 13464 iccmax 13477 elxrge0 13511 nfile 14424 hashdom 14444 hashdomi 14445 hashge1 14454 hashss 14474 hashge2el2difr 14547 pcdvdsb 16962 pc2dvds 16972 pcaddlem 16981 xrsdsreclblem 21627 leordtvallem1 23436 lecldbas 23445 isxmet2d 24554 blssec 24662 nmoix 24956 nmoleub 24958 xrtgioo 25034 xrge0tsms 25062 metdstri 25079 nmoleub2lem 25343 ovolf 25711 ovollb2 25718 ovoliun 25734 ovolre 25754 voliunlem3 25781 volsup 25785 icombl 25793 ioombl 25794 ismbfd 25868 itg2seq 25971 dvfsumrlim 26259 dvfsumrlim2 26260 radcnvcl 26654 logfacbnd3 27460 log2sumbnd 27781 tgldimor 28845 xrdifh 33252 xrge0tsmsd 33514 unitssxrge0 34411 tpr2rico 34423 lmxrge0 34463 esumle 34569 esumlef 34573 esumpinfval 34584 esumpinfsum 34588 esumcvgsum 34599 ddemeas 34748 sxbrsigalem2 34798 omssubadd 34812 carsgclctunlem3 34832 signsply0 35060 ismblfin 38411 xrgepnfd 46162 supxrgelem 46168 supxrge 46169 infrpge 46182 xrlexaddrp 46183 infleinflem1 46200 infleinf 46202 infxrpnf 46275 ge0xrre 46362 iblsplit 46795 ismbl3 46815 ovolsplit 46817 sge0cl 47210 sge0less 47221 sge0pr 47223 sge0le 47236 sge0split 47238 carageniuncl 47352 ovnsubaddlem1 47399 hspmbl 47458 pgrpgt2nabl 49297 |
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