| Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
| 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 13054 | . 2 ⊢ (𝐴 ∈ ℝ* → ¬ +∞ < 𝐴) | |
| 2 | pnfxr 11198 | . . 3 ⊢ +∞ ∈ ℝ* | |
| 3 | xrlenlt 11209 | . . 3 ⊢ ((𝐴 ∈ ℝ* ∧ +∞ ∈ ℝ*) → (𝐴 ≤ +∞ ↔ ¬ +∞ < 𝐴)) | |
| 4 | 2, 3 | mpan2 692 | . 2 ⊢ (𝐴 ∈ ℝ* → (𝐴 ≤ +∞ ↔ ¬ +∞ < 𝐴)) |
| 5 | 1, 4 | mpbird 257 | 1 ⊢ (𝐴 ∈ ℝ* → 𝐴 ≤ +∞) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∈ wcel 2114 class class class wbr 5100 +∞cpnf 11175 ℝ*cxr 11177 < clt 11178 ≤ cle 11179 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2709 ax-sep 5243 ax-pow 5312 ax-pr 5379 ax-un 7690 ax-cnex 11094 ax-resscn 11095 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2716 df-cleq 2729 df-clel 2812 df-ne 2934 df-nel 3038 df-ral 3053 df-rex 3063 df-rab 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-pw 4558 df-sn 4583 df-pr 4585 df-op 4589 df-uni 4866 df-br 5101 df-opab 5163 df-xp 5638 df-cnv 5640 df-pnf 11180 df-mnf 11181 df-xr 11182 df-ltxr 11183 df-le 11184 |
| This theorem is referenced by: pnfged 13057 xnn0n0n1ge2b 13058 0lepnf 13059 nltpnft 13091 xrre2 13097 xnn0lem1lt 13171 xleadd1a 13180 xlt2add 13187 xsubge0 13188 xlesubadd 13190 xlemul1a 13215 elicore 13326 elico2 13338 iccmax 13351 elxrge0 13385 nfile 14294 hashdom 14314 hashdomi 14315 hashge1 14324 hashss 14344 hashge2el2difr 14416 pcdvdsb 16809 pc2dvds 16819 pcaddlem 16828 xrsdsreclblem 21379 leordtvallem1 23166 lecldbas 23175 isxmet2d 24283 blssec 24391 nmoix 24685 nmoleub 24687 xrtgioo 24763 xrge0tsms 24791 metdstri 24808 nmoleub2lem 25082 ovolf 25451 ovollb2 25458 ovoliun 25474 ovolre 25494 voliunlem3 25521 volsup 25525 icombl 25533 ioombl 25534 ismbfd 25608 itg2seq 25711 dvfsumrlim 26006 dvfsumrlim2 26007 radcnvcl 26394 logfacbnd3 27202 log2sumbnd 27523 tgldimor 28586 xrdifh 32871 xrge0tsmsd 33167 unitssxrge0 34078 tpr2rico 34090 lmxrge0 34130 esumle 34236 esumlef 34240 esumpinfval 34251 esumpinfsum 34255 esumcvgsum 34266 ddemeas 34414 sxbrsigalem2 34464 omssubadd 34478 carsgclctunlem3 34498 signsply0 34729 ismblfin 37912 xrgepnfd 45690 supxrgelem 45696 supxrge 45697 infrpge 45710 xrlexaddrp 45711 infleinflem1 45728 infleinf 45730 infxrpnf 45804 ge0xrre 45891 iblsplit 46324 ismbl3 46344 ovolsplit 46346 sge0cl 46739 sge0less 46750 sge0pr 46752 sge0le 46765 sge0split 46767 carageniuncl 46881 ovnsubaddlem1 46928 hspmbl 46987 pgrpgt2nabl 48726 |
| Copyright terms: Public domain | W3C validator |