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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 13130 | . 2 ⊢ (𝐴 ∈ ℝ* → ¬ +∞ < 𝐴) | |
| 2 | pnfxr 11236 | . . 3 ⊢ +∞ ∈ ℝ* | |
| 3 | xrlenlt 11247 | . . 3 ⊢ ((𝐴 ∈ ℝ* ∧ +∞ ∈ ℝ*) → (𝐴 ≤ +∞ ↔ ¬ +∞ < 𝐴)) | |
| 4 | 2, 3 | mpan2 701 | . 2 ⊢ (𝐴 ∈ ℝ* → (𝐴 ≤ +∞ ↔ ¬ +∞ < 𝐴)) |
| 5 | 1, 4 | mpbird 259 | 1 ⊢ (𝐴 ∈ ℝ* → 𝐴 ≤ +∞) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 208 ∈ wcel 2142 class class class wbr 5100 +∞cpnf 11213 ℝ*cxr 11215 < clt 11216 ≤ cle 11217 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1815 ax-4 1829 ax-5 1930 ax-6 1987 ax-7 2028 ax-8 2144 ax-9 2152 ax-ext 2734 ax-sep 5246 ax-pow 5322 ax-pr 5390 ax-un 7718 ax-cnex 11129 ax-resscn 11130 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1100 df-tru 1563 df-fal 1573 df-ex 1800 df-sb 2091 df-clab 2741 df-cleq 2754 df-clel 2837 df-ne 2958 df-nel 3062 df-ral 3077 df-rex 3087 df-rab 3415 df-v 3456 df-dif 3907 df-un 3909 df-in 3911 df-ss 3921 df-nul 4286 df-if 4481 df-pw 4557 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-xp 5653 df-cnv 5655 df-pnf 11218 df-mnf 11219 df-xr 11220 df-ltxr 11221 df-le 11222 |
| This theorem is referenced by: pnfged 13133 xnn0n0n1ge2b 13134 0lepnf 13135 nltpnft 13167 xrre2 13173 xnn0lem1lt 13247 xleadd1a 13256 xlt2add 13263 xsubge0 13264 xlesubadd 13266 xlemul1a 13291 elicore 13402 elico2 13414 iccmax 13427 elxrge0 13461 nfile 14372 hashdom 14392 hashdomi 14393 hashge1 14402 hashss 14422 hashge2el2difr 14494 pcdvdsb 16905 pc2dvds 16915 pcaddlem 16924 xrsdsreclblem 21465 leordtvallem1 23270 lecldbas 23279 isxmet2d 24387 blssec 24495 nmoix 24789 nmoleub 24791 xrtgioo 24867 xrge0tsms 24895 metdstri 24912 nmoleub2lem 25176 ovolf 25544 ovollb2 25551 ovoliun 25567 ovolre 25587 voliunlem3 25614 volsup 25618 icombl 25626 ioombl 25627 ismbfd 25701 itg2seq 25804 dvfsumrlim 26093 dvfsumrlim2 26094 radcnvcl 26480 logfacbnd3 27287 log2sumbnd 27608 tgldimor 28671 xrdifh 32982 xrge0tsmsd 33253 unitssxrge0 34197 tpr2rico 34209 lmxrge0 34249 esumle 34355 esumlef 34359 esumpinfval 34370 esumpinfsum 34374 esumcvgsum 34385 ddemeas 34533 sxbrsigalem2 34583 omssubadd 34597 carsgclctunlem3 34617 signsply0 34845 ismblfin 38160 xrgepnfd 45907 supxrgelem 45913 supxrge 45914 infrpge 45927 xrlexaddrp 45928 infleinflem1 45945 infleinf 45947 infxrpnf 46020 ge0xrre 46107 iblsplit 46540 ismbl3 46560 ovolsplit 46562 sge0cl 46955 sge0less 46966 sge0pr 46968 sge0le 46981 sge0split 46983 carageniuncl 47097 ovnsubaddlem1 47144 hspmbl 47203 pgrpgt2nabl 48988 |
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