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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 12517 | . 2 ⊢ (𝐴 ∈ ℝ* → ¬ +∞ < 𝐴) | |
2 | pnfxr 10689 | . . 3 ⊢ +∞ ∈ ℝ* | |
3 | xrlenlt 10700 | . . 3 ⊢ ((𝐴 ∈ ℝ* ∧ +∞ ∈ ℝ*) → (𝐴 ≤ +∞ ↔ ¬ +∞ < 𝐴)) | |
4 | 2, 3 | mpan2 689 | . 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 2110 class class class wbr 5058 +∞cpnf 10666 ℝ*cxr 10668 < clt 10669 ≤ cle 10670 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1792 ax-4 1806 ax-5 1907 ax-6 1966 ax-7 2011 ax-8 2112 ax-9 2120 ax-10 2141 ax-11 2157 ax-12 2173 ax-ext 2793 ax-sep 5195 ax-nul 5202 ax-pow 5258 ax-pr 5321 ax-un 7455 ax-cnex 10587 ax-resscn 10588 |
This theorem depends on definitions: df-bi 209 df-an 399 df-or 844 df-3an 1085 df-tru 1536 df-ex 1777 df-nf 1781 df-sb 2066 df-mo 2618 df-eu 2650 df-clab 2800 df-cleq 2814 df-clel 2893 df-nfc 2963 df-ne 3017 df-nel 3124 df-ral 3143 df-rex 3144 df-rab 3147 df-v 3496 df-dif 3938 df-un 3940 df-in 3942 df-ss 3951 df-nul 4291 df-if 4467 df-pw 4540 df-sn 4561 df-pr 4563 df-op 4567 df-uni 4832 df-br 5059 df-opab 5121 df-xp 5555 df-cnv 5557 df-pnf 10671 df-mnf 10672 df-xr 10673 df-ltxr 10674 df-le 10675 |
This theorem is referenced by: xnn0n0n1ge2b 12520 0lepnf 12521 nltpnft 12551 xrre2 12557 xnn0lem1lt 12631 xleadd1a 12640 xlt2add 12647 xsubge0 12648 xlesubadd 12650 xlemul1a 12675 elicore 12783 elico2 12794 iccmax 12806 elxrge0 12839 nfile 13714 hashdom 13734 hashdomi 13735 hashge1 13744 hashss 13764 hashge2el2difr 13833 pcdvdsb 16199 pc2dvds 16209 pcaddlem 16218 xrsdsreclblem 20585 leordtvallem1 21812 lecldbas 21821 isxmet2d 22931 blssec 23039 nmoix 23332 nmoleub 23334 xrtgioo 23408 xrge0tsms 23436 metdstri 23453 nmoleub2lem 23712 ovolf 24077 ovollb2 24084 ovoliun 24100 ovolre 24120 voliunlem3 24147 volsup 24151 icombl 24159 ioombl 24160 ismbfd 24234 itg2seq 24337 dvfsumrlim 24622 dvfsumrlim2 24623 radcnvcl 24999 xrlimcnp 25540 logfacbnd3 25793 log2sumbnd 26114 tgldimor 26282 xrdifh 30497 xrge0tsmsd 30687 unitssxrge0 31138 tpr2rico 31150 lmxrge0 31190 esumle 31312 esumlef 31316 esumpinfval 31327 esumpinfsum 31331 esumcvgsum 31342 ddemeas 31490 sxbrsigalem2 31539 omssubadd 31553 carsgclctunlem3 31573 signsply0 31816 ismblfin 34927 xrgepnfd 41592 supxrgelem 41598 supxrge 41599 infrpge 41612 xrlexaddrp 41613 infleinflem1 41631 infleinf 41633 infxrpnf 41714 pnfged 41743 ge0xrre 41800 iblsplit 42244 ismbl3 42265 ovolsplit 42267 sge0cl 42657 sge0less 42668 sge0pr 42670 sge0le 42683 sge0split 42685 carageniuncl 42799 ovnsubaddlem1 42846 hspmbl 42905 pimiooltgt 42983 pgrpgt2nabl 44408 |
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