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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 13148 | . 2 ⊢ (𝐴 ∈ ℝ* → ¬ +∞ < 𝐴) | |
| 2 | pnfxr 11258 | . . 3 ⊢ +∞ ∈ ℝ* | |
| 3 | xrlenlt 11269 | . . 3 ⊢ ((𝐴 ∈ ℝ* ∧ +∞ ∈ ℝ*) → (𝐴 ≤ +∞ ↔ ¬ +∞ < 𝐴)) | |
| 4 | 2, 3 | mpan2 703 | . 2 ⊢ (𝐴 ∈ ℝ* → (𝐴 ≤ +∞ ↔ ¬ +∞ < 𝐴)) |
| 5 | 1, 4 | mpbird 260 | 1 ⊢ (𝐴 ∈ ℝ* → 𝐴 ≤ +∞) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 ∈ wcel 2143 class class class wbr 5109 +∞cpnf 11235 ℝ*cxr 11237 < clt 11238 ≤ cle 11239 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 ax-sep 5257 ax-pow 5336 ax-pr 5404 ax-un 7732 ax-cnex 11151 ax-resscn 11152 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-ne 2959 df-nel 3065 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3908 df-un 3910 df-in 3912 df-ss 3922 df-nul 4287 df-if 4488 df-pw 4564 df-sn 4590 df-pr 4592 df-op 4596 df-uni 4873 df-br 5110 df-opab 5174 df-xp 5667 df-cnv 5669 df-pnf 11240 df-mnf 11241 df-xr 11242 df-ltxr 11243 df-le 11244 |
| This theorem is referenced by: pnfged 13151 xnn0n0n1ge2b 13152 0lepnf 13153 nltpnft 13185 xrre2 13191 xnn0lem1lt 13265 xleadd1a 13274 xlt2add 13281 xsubge0 13282 xlesubadd 13284 xlemul1a 13309 elicore 13420 elico2 13432 iccmax 13445 elxrge0 13479 nfile 14391 hashdom 14411 hashdomi 14412 hashge1 14421 hashss 14441 hashge2el2difr 14514 pcdvdsb 16924 pc2dvds 16934 pcaddlem 16943 xrsdsreclblem 21563 leordtvallem1 23367 lecldbas 23376 isxmet2d 24484 blssec 24592 nmoix 24886 nmoleub 24888 xrtgioo 24964 xrge0tsms 24992 metdstri 25009 nmoleub2lem 25273 ovolf 25641 ovollb2 25648 ovoliun 25664 ovolre 25684 voliunlem3 25711 volsup 25715 icombl 25723 ioombl 25724 ismbfd 25798 itg2seq 25901 dvfsumrlim 26190 dvfsumrlim2 26191 radcnvcl 26580 logfacbnd3 27387 log2sumbnd 27708 tgldimor 28771 xrdifh 33125 xrge0tsmsd 33393 unitssxrge0 34290 tpr2rico 34302 lmxrge0 34342 esumle 34448 esumlef 34452 esumpinfval 34463 esumpinfsum 34467 esumcvgsum 34478 ddemeas 34626 sxbrsigalem2 34676 omssubadd 34690 carsgclctunlem3 34710 signsply0 34938 ismblfin 38332 xrgepnfd 46067 supxrgelem 46073 supxrge 46074 infrpge 46087 xrlexaddrp 46088 infleinflem1 46105 infleinf 46107 infxrpnf 46180 ge0xrre 46267 iblsplit 46700 ismbl3 46720 ovolsplit 46722 sge0cl 47115 sge0less 47126 sge0pr 47128 sge0le 47141 sge0split 47143 carageniuncl 47257 ovnsubaddlem1 47304 hspmbl 47363 pgrpgt2nabl 49166 |
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