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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 11838 | . 2 ⊢ (𝐴 ∈ ℝ* → ¬ +∞ < 𝐴) | |
2 | pnfxr 9971 | . . 3 ⊢ +∞ ∈ ℝ* | |
3 | xrlenlt 9982 | . . 3 ⊢ ((𝐴 ∈ ℝ* ∧ +∞ ∈ ℝ*) → (𝐴 ≤ +∞ ↔ ¬ +∞ < 𝐴)) | |
4 | 2, 3 | mpan2 703 | . 2 ⊢ (𝐴 ∈ ℝ* → (𝐴 ≤ +∞ ↔ ¬ +∞ < 𝐴)) |
5 | 1, 4 | mpbird 246 | 1 ⊢ (𝐴 ∈ ℝ* → 𝐴 ≤ +∞) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 195 ∈ wcel 1977 class class class wbr 4583 +∞cpnf 9950 ℝ*cxr 9952 < clt 9953 ≤ cle 9954 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-8 1979 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pow 4769 ax-pr 4833 ax-un 6847 ax-cnex 9871 ax-resscn 9872 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ne 2782 df-nel 2783 df-ral 2901 df-rex 2902 df-rab 2905 df-v 3175 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-pw 4110 df-sn 4126 df-pr 4128 df-op 4132 df-uni 4373 df-br 4584 df-opab 4644 df-xp 5044 df-cnv 5046 df-pnf 9955 df-mnf 9956 df-xr 9957 df-ltxr 9958 df-le 9959 |
This theorem is referenced by: xnn0n0n1ge2b 11841 0lepnf 11842 nltpnft 11871 xrre2 11875 xleadd1a 11955 xlt2add 11962 xsubge0 11963 xlesubadd 11965 xlemul1a 11990 elicore 12097 elico2 12108 iccmax 12120 elxrge0 12152 hashdom 13029 hashdomi 13030 hashge1 13039 hashss 13058 hashge2el2difr 13118 pcdvdsb 15411 pc2dvds 15421 pcaddlem 15430 xrsdsreclblem 19611 leordtvallem1 20824 lecldbas 20833 isxmet2d 21942 blssec 22050 nmoix 22343 nmoleub 22345 xrtgioo 22417 xrge0tsms 22445 metdstri 22462 nmoleub2lem 22722 ovolf 23057 ovollb2 23064 ovoliun 23080 ovolre 23100 voliunlem3 23127 volsup 23131 icombl 23139 ioombl 23140 ismbfd 23213 itg2seq 23315 dvfsumrlim 23598 dvfsumrlim2 23599 radcnvcl 23975 xrlimcnp 24495 logfacbnd3 24748 log2sumbnd 25033 tgldimor 25197 sizeusglecusg 26014 vdgfrgragt2 26554 xrdifh 28932 xrge0tsmsd 29116 unitssxrge0 29274 tpr2rico 29286 lmxrge0 29326 esumle 29447 esumlef 29451 esumpinfval 29462 esumpinfsum 29466 esumcvgsum 29477 ddemeas 29626 sxbrsigalem2 29675 omssubadd 29689 carsgclctunlem3 29709 signsply0 29954 ismblfin 32620 xrgepnfd 38488 supxrgelem 38494 supxrge 38495 infrpge 38508 xrlexaddrp 38509 infleinflem1 38527 infleinf 38529 ge0xrre 38605 iblsplit 38858 ismbl3 38879 ovolsplit 38881 sge0cl 39274 sge0less 39285 sge0pr 39287 sge0le 39300 sge0split 39302 carageniuncl 39413 ovnsubaddlem1 39460 hspmbl 39519 pimiooltgt 39598 nfile 40369 pgrpgt2nabl 41941 |
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