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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 13040 | . 2 ⊢ (𝐴 ∈ ℝ* → ¬ +∞ < 𝐴) | |
| 2 | pnfxr 11184 | . . 3 ⊢ +∞ ∈ ℝ* | |
| 3 | xrlenlt 11195 | . . 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 2113 class class class wbr 5096 +∞cpnf 11161 ℝ*cxr 11163 < clt 11164 ≤ cle 11165 |
| 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 2115 ax-9 2123 ax-ext 2706 ax-sep 5239 ax-nul 5249 ax-pow 5308 ax-pr 5375 ax-un 7678 ax-cnex 11080 ax-resscn 11081 |
| 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 2713 df-cleq 2726 df-clel 2809 df-ne 2931 df-nel 3035 df-ral 3050 df-rex 3059 df-rab 3398 df-v 3440 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4284 df-if 4478 df-pw 4554 df-sn 4579 df-pr 4581 df-op 4585 df-uni 4862 df-br 5097 df-opab 5159 df-xp 5628 df-cnv 5630 df-pnf 11166 df-mnf 11167 df-xr 11168 df-ltxr 11169 df-le 11170 |
| This theorem is referenced by: pnfged 13043 xnn0n0n1ge2b 13044 0lepnf 13045 nltpnft 13077 xrre2 13083 xnn0lem1lt 13157 xleadd1a 13166 xlt2add 13173 xsubge0 13174 xlesubadd 13176 xlemul1a 13201 elicore 13312 elico2 13324 iccmax 13337 elxrge0 13371 nfile 14280 hashdom 14300 hashdomi 14301 hashge1 14310 hashss 14330 hashge2el2difr 14402 pcdvdsb 16795 pc2dvds 16805 pcaddlem 16814 xrsdsreclblem 21365 leordtvallem1 23152 lecldbas 23161 isxmet2d 24269 blssec 24377 nmoix 24671 nmoleub 24673 xrtgioo 24749 xrge0tsms 24777 metdstri 24794 nmoleub2lem 25068 ovolf 25437 ovollb2 25444 ovoliun 25460 ovolre 25480 voliunlem3 25507 volsup 25511 icombl 25519 ioombl 25520 ismbfd 25594 itg2seq 25697 dvfsumrlim 25992 dvfsumrlim2 25993 radcnvcl 26380 logfacbnd3 27188 log2sumbnd 27509 tgldimor 28523 xrdifh 32809 xrge0tsmsd 33104 unitssxrge0 34006 tpr2rico 34018 lmxrge0 34058 esumle 34164 esumlef 34168 esumpinfval 34179 esumpinfsum 34183 esumcvgsum 34194 ddemeas 34342 sxbrsigalem2 34392 omssubadd 34406 carsgclctunlem3 34426 signsply0 34657 ismblfin 37801 xrgepnfd 45518 supxrgelem 45524 supxrge 45525 infrpge 45538 xrlexaddrp 45539 infleinflem1 45556 infleinf 45558 infxrpnf 45632 ge0xrre 45719 iblsplit 46152 ismbl3 46172 ovolsplit 46174 sge0cl 46567 sge0less 46578 sge0pr 46580 sge0le 46593 sge0split 46595 carageniuncl 46709 ovnsubaddlem1 46756 hspmbl 46815 pgrpgt2nabl 48554 |
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