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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 13149 | . 2 ⊢ (𝐴 ∈ ℝ* → ¬ +∞ < 𝐴) | |
| 2 | pnfxr 11259 | . . 3 ⊢ +∞ ∈ ℝ* | |
| 3 | xrlenlt 11270 | . . 3 ⊢ ((𝐴 ∈ ℝ* ∧ +∞ ∈ ℝ*) → (𝐴 ≤ +∞ ↔ ¬ +∞ < 𝐴)) | |
| 4 | 2, 3 | mpan2 703 | . 2 ⊢ (𝐴 ∈ ℝ* → (𝐴 ≤ +∞ ↔ ¬ +∞ < 𝐴)) |
| 5 | 1, 4 | mpbird 260 | 1 ⊢ (𝐴 ∈ ℝ* → 𝐴 ≤ +∞) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 ∈ wcel 2149 class class class wbr 5110 +∞cpnf 11236 ℝ*cxr 11238 < clt 11239 ≤ cle 11240 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1822 ax-4 1836 ax-5 1937 ax-6 1994 ax-7 2035 ax-8 2151 ax-9 2159 ax-ext 2741 ax-sep 5258 ax-pow 5334 ax-pr 5402 ax-un 7730 ax-cnex 11152 ax-resscn 11153 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1103 df-tru 1570 df-fal 1580 df-ex 1807 df-sb 2098 df-clab 2748 df-cleq 2761 df-clel 2844 df-ne 2965 df-nel 3071 df-ral 3086 df-rex 3096 df-rab 3424 df-v 3465 df-dif 3916 df-un 3918 df-in 3920 df-ss 3930 df-nul 4295 df-if 4490 df-pw 4566 df-sn 4592 df-pr 4594 df-op 4598 df-uni 4874 df-br 5111 df-opab 5175 df-xp 5665 df-cnv 5667 df-pnf 11241 df-mnf 11242 df-xr 11243 df-ltxr 11244 df-le 11245 |
| This theorem is referenced by: pnfged 13152 xnn0n0n1ge2b 13153 0lepnf 13154 nltpnft 13186 xrre2 13192 xnn0lem1lt 13266 xleadd1a 13275 xlt2add 13282 xsubge0 13283 xlesubadd 13285 xlemul1a 13310 elicore 13421 elico2 13433 iccmax 13446 elxrge0 13480 nfile 14391 hashdom 14411 hashdomi 14412 hashge1 14421 hashss 14441 hashge2el2difr 14514 pcdvdsb 16925 pc2dvds 16935 pcaddlem 16944 xrsdsreclblem 21528 leordtvallem1 23332 lecldbas 23341 isxmet2d 24449 blssec 24557 nmoix 24851 nmoleub 24853 xrtgioo 24929 xrge0tsms 24957 metdstri 24974 nmoleub2lem 25238 ovolf 25606 ovollb2 25613 ovoliun 25629 ovolre 25649 voliunlem3 25676 volsup 25680 icombl 25688 ioombl 25689 ismbfd 25763 itg2seq 25866 dvfsumrlim 26155 dvfsumrlim2 26156 radcnvcl 26542 logfacbnd3 27349 log2sumbnd 27670 tgldimor 28733 xrdifh 33062 xrge0tsmsd 33330 unitssxrge0 34231 tpr2rico 34243 lmxrge0 34283 esumle 34389 esumlef 34393 esumpinfval 34404 esumpinfsum 34408 esumcvgsum 34419 ddemeas 34567 sxbrsigalem2 34617 omssubadd 34631 carsgclctunlem3 34651 signsply0 34879 ismblfin 38195 xrgepnfd 45932 supxrgelem 45938 supxrge 45939 infrpge 45952 xrlexaddrp 45953 infleinflem1 45970 infleinf 45972 infxrpnf 46045 ge0xrre 46132 iblsplit 46565 ismbl3 46585 ovolsplit 46587 sge0cl 46980 sge0less 46991 sge0pr 46993 sge0le 47006 sge0split 47008 carageniuncl 47122 ovnsubaddlem1 47169 hspmbl 47228 pgrpgt2nabl 49024 |
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