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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 13070 | . 2 ⊢ (𝐴 ∈ ℝ* → ¬ +∞ < 𝐴) | |
| 2 | pnfxr 11190 | . . 3 ⊢ +∞ ∈ ℝ* | |
| 3 | xrlenlt 11201 | . . 3 ⊢ ((𝐴 ∈ ℝ* ∧ +∞ ∈ ℝ*) → (𝐴 ≤ +∞ ↔ ¬ +∞ < 𝐴)) | |
| 4 | 2, 3 | mpan2 697 | . 2 ⊢ (𝐴 ∈ ℝ* → (𝐴 ≤ +∞ ↔ ¬ +∞ < 𝐴)) |
| 5 | 1, 4 | mpbird 258 | 1 ⊢ (𝐴 ∈ ℝ* → 𝐴 ≤ +∞) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 207 ∈ wcel 2119 class class class wbr 5072 +∞cpnf 11167 ℝ*cxr 11169 < clt 11170 ≤ cle 11171 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-ext 2711 ax-sep 5218 ax-pow 5294 ax-pr 5362 ax-un 7678 ax-cnex 11085 ax-resscn 11086 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-sb 2074 df-clab 2718 df-cleq 2731 df-clel 2814 df-ne 2935 df-nel 3039 df-ral 3054 df-rex 3064 df-rab 3392 df-v 3433 df-dif 3886 df-un 3888 df-in 3890 df-ss 3900 df-nul 4262 df-if 4455 df-pw 4531 df-sn 4556 df-pr 4558 df-op 4562 df-uni 4839 df-br 5073 df-opab 5135 df-xp 5624 df-cnv 5626 df-pnf 11172 df-mnf 11173 df-xr 11174 df-ltxr 11175 df-le 11176 |
| This theorem is referenced by: pnfged 13073 xnn0n0n1ge2b 13074 0lepnf 13075 nltpnft 13107 xrre2 13113 xnn0lem1lt 13187 xleadd1a 13196 xlt2add 13203 xsubge0 13204 xlesubadd 13206 xlemul1a 13231 elicore 13342 elico2 13354 iccmax 13367 elxrge0 13401 nfile 14312 hashdom 14332 hashdomi 14333 hashge1 14342 hashss 14362 hashge2el2difr 14434 pcdvdsb 16831 pc2dvds 16841 pcaddlem 16850 xrsdsreclblem 21388 leordtvallem1 23193 lecldbas 23202 isxmet2d 24310 blssec 24418 nmoix 24712 nmoleub 24714 xrtgioo 24790 xrge0tsms 24818 metdstri 24835 nmoleub2lem 25099 ovolf 25467 ovollb2 25474 ovoliun 25490 ovolre 25510 voliunlem3 25537 volsup 25541 icombl 25549 ioombl 25550 ismbfd 25624 itg2seq 25727 dvfsumrlim 26016 dvfsumrlim2 26017 radcnvcl 26400 logfacbnd3 27204 log2sumbnd 27525 tgldimor 28588 xrdifh 32872 xrge0tsmsd 33154 unitssxrge0 34084 tpr2rico 34096 lmxrge0 34136 esumle 34242 esumlef 34246 esumpinfval 34257 esumpinfsum 34261 esumcvgsum 34272 ddemeas 34420 sxbrsigalem2 34470 omssubadd 34484 carsgclctunlem3 34504 signsply0 34735 ismblfin 38028 xrgepnfd 45776 supxrgelem 45782 supxrge 45783 infrpge 45796 xrlexaddrp 45797 infleinflem1 45814 infleinf 45816 infxrpnf 45889 ge0xrre 45976 iblsplit 46409 ismbl3 46429 ovolsplit 46431 sge0cl 46824 sge0less 46835 sge0pr 46837 sge0le 46850 sge0split 46852 carageniuncl 46966 ovnsubaddlem1 47013 hspmbl 47072 pgrpgt2nabl 48857 |
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