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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 13297 | . 2 ⊢ (𝐴 ∈ ℝ* → ¬ +∞ < 𝐴) | |
| 2 | pnfxr 11402 | . . 3 ⊢ +∞ ∈ ℝ* | |
| 3 | xrlenlt 11413 | . . 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 2147 class class class wbr 5108 +∞cpnf 11379 ℝ*cxr 11381 < clt 11382 ≤ cle 11383 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 ax-sep 5255 ax-pow 5334 ax-pr 5398 ax-un 7783 ax-cnex 11295 ax-resscn 11296 |
| 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 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-ne 2960 df-nel 3066 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-pw 4562 df-sn 4589 df-pr 4591 df-op 4841 df-uni 4873 df-br 5109 df-opab 5174 df-xp 5664 df-cnv 5666 df-pnf 11384 df-mnf 11385 df-xr 11386 df-ltxr 11387 df-le 11388 |
| This theorem is used by: pnfged 13300 xnn0n0n1ge2b 13301 0lepnf 13302 nltpnft 13334 xrre2 13340 xnn0lem1lt 13414 xleadd1a 13423 xlt2add 13430 xsubge0 13431 xlesubadd 13433 xlemul1a 13458 elicore 13569 elico2 13581 iccmax 13594 elxrge0 13628 nfile 14544 hashdom 14564 hashdomi 14565 hashge1 14574 hashss 14594 hashge2el2difr 14667 pcdvdsb 17091 pc2dvds 17101 pcaddlem 17110 xrsdsreclblem 21771 leordtvallem1 23583 lecldbas 23592 isxmet2d 24701 blssec 24809 nmoix 25103 nmoleub 25105 xrtgioo 25181 xrge0tsms 25209 metdstri 25226 nmoleub2lem 25490 ovolf 25858 ovollb2 25865 ovoliun 25881 ovolre 25901 voliunlem3 25928 volsup 25932 icombl 25940 ioombl 25941 ismbfd 26015 itg2seq 26118 dvfsumrlim 26406 dvfsumrlim2 26407 radcnvcl 26801 logfacbnd3 27607 log2sumbnd 27928 tgldimor 29022 xrdifh 33468 xrge0tsmsd 33733 unitssxrge0 34643 tpr2rico 34655 lmxrge0 34695 esumle 34801 esumlef 34805 esumpinfval 34816 esumpinfsum 34820 esumcvgsum 34831 ddemeas 34980 sxbrsigalem2 35029 carsgclctunlem3 35063 signsply0 35291 ismblfin 38847 xrgepnfd 46616 supxrgelem 46622 supxrge 46623 infrpge 46636 xrlexaddrp 46637 infleinflem1 46654 infleinf 46656 infxrpnf 46729 ge0xrre 46816 iblsplit 47249 ismbl3 47269 ovolsplit 47271 sge0cl 47664 sge0less 47675 sge0pr 47677 sge0le 47690 sge0split 47692 carageniuncl 47806 ovnsubaddlem1 47853 hspmbl 47912 pgrpgt2nabl 49809 |
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