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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 13033 | . 2 ⊢ (𝐴 ∈ ℝ* → ¬ +∞ < 𝐴) | |
| 2 | pnfxr 11172 | . . 3 ⊢ +∞ ∈ ℝ* | |
| 3 | xrlenlt 11183 | . . 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 2111 class class class wbr 5093 +∞cpnf 11149 ℝ*cxr 11151 < clt 11152 ≤ cle 11153 |
| 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 2113 ax-9 2121 ax-ext 2703 ax-sep 5236 ax-nul 5246 ax-pow 5305 ax-pr 5372 ax-un 7674 ax-cnex 11068 ax-resscn 11069 |
| 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 2710 df-cleq 2723 df-clel 2806 df-ne 2929 df-nel 3033 df-ral 3048 df-rex 3057 df-rab 3396 df-v 3438 df-dif 3900 df-un 3902 df-in 3904 df-ss 3914 df-nul 4283 df-if 4475 df-pw 4551 df-sn 4576 df-pr 4578 df-op 4582 df-uni 4859 df-br 5094 df-opab 5156 df-xp 5625 df-cnv 5627 df-pnf 11154 df-mnf 11155 df-xr 11156 df-ltxr 11157 df-le 11158 |
| This theorem is referenced by: pnfged 13036 xnn0n0n1ge2b 13037 0lepnf 13038 nltpnft 13069 xrre2 13075 xnn0lem1lt 13149 xleadd1a 13158 xlt2add 13165 xsubge0 13166 xlesubadd 13168 xlemul1a 13193 elicore 13304 elico2 13316 iccmax 13329 elxrge0 13363 nfile 14272 hashdom 14292 hashdomi 14293 hashge1 14302 hashss 14322 hashge2el2difr 14394 pcdvdsb 16787 pc2dvds 16797 pcaddlem 16806 xrsdsreclblem 21355 leordtvallem1 23131 lecldbas 23140 isxmet2d 24248 blssec 24356 nmoix 24650 nmoleub 24652 xrtgioo 24728 xrge0tsms 24756 metdstri 24773 nmoleub2lem 25047 ovolf 25416 ovollb2 25423 ovoliun 25439 ovolre 25459 voliunlem3 25486 volsup 25490 icombl 25498 ioombl 25499 ismbfd 25573 itg2seq 25676 dvfsumrlim 25971 dvfsumrlim2 25972 radcnvcl 26359 logfacbnd3 27167 log2sumbnd 27488 tgldimor 28486 xrdifh 32770 xrge0tsmsd 33049 unitssxrge0 33920 tpr2rico 33932 lmxrge0 33972 esumle 34078 esumlef 34082 esumpinfval 34093 esumpinfsum 34097 esumcvgsum 34108 ddemeas 34256 sxbrsigalem2 34306 omssubadd 34320 carsgclctunlem3 34340 signsply0 34571 ismblfin 37707 xrgepnfd 45435 supxrgelem 45441 supxrge 45442 infrpge 45455 xrlexaddrp 45456 infleinflem1 45473 infleinf 45475 infxrpnf 45549 ge0xrre 45636 iblsplit 46069 ismbl3 46089 ovolsplit 46091 sge0cl 46484 sge0less 46495 sge0pr 46497 sge0le 46510 sge0split 46512 carageniuncl 46626 ovnsubaddlem1 46673 hspmbl 46732 pgrpgt2nabl 48471 |
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