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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 13079 | . 2 ⊢ (𝐴 ∈ ℝ* → ¬ +∞ < 𝐴) | |
| 2 | pnfxr 11199 | . . 3 ⊢ +∞ ∈ ℝ* | |
| 3 | xrlenlt 11210 | . . 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 5085 +∞cpnf 11176 ℝ*cxr 11178 < clt 11179 ≤ cle 11180 |
| 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 2708 ax-sep 5231 ax-pow 5307 ax-pr 5375 ax-un 7689 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 2715 df-cleq 2728 df-clel 2811 df-ne 2933 df-nel 3037 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-pw 4543 df-sn 4568 df-pr 4570 df-op 4574 df-uni 4851 df-br 5086 df-opab 5148 df-xp 5637 df-cnv 5639 df-pnf 11181 df-mnf 11182 df-xr 11183 df-ltxr 11184 df-le 11185 |
| This theorem is referenced by: pnfged 13082 xnn0n0n1ge2b 13083 0lepnf 13084 nltpnft 13116 xrre2 13122 xnn0lem1lt 13196 xleadd1a 13205 xlt2add 13212 xsubge0 13213 xlesubadd 13215 xlemul1a 13240 elicore 13351 elico2 13363 iccmax 13376 elxrge0 13410 nfile 14321 hashdom 14341 hashdomi 14342 hashge1 14351 hashss 14371 hashge2el2difr 14443 pcdvdsb 16840 pc2dvds 16850 pcaddlem 16859 xrsdsreclblem 21393 leordtvallem1 23175 lecldbas 23184 isxmet2d 24292 blssec 24400 nmoix 24694 nmoleub 24696 xrtgioo 24772 xrge0tsms 24800 metdstri 24817 nmoleub2lem 25081 ovolf 25449 ovollb2 25456 ovoliun 25472 ovolre 25492 voliunlem3 25519 volsup 25523 icombl 25531 ioombl 25532 ismbfd 25606 itg2seq 25709 dvfsumrlim 25998 dvfsumrlim2 25999 radcnvcl 26382 logfacbnd3 27186 log2sumbnd 27507 tgldimor 28570 xrdifh 32853 xrge0tsmsd 33134 unitssxrge0 34044 tpr2rico 34056 lmxrge0 34096 esumle 34202 esumlef 34206 esumpinfval 34217 esumpinfsum 34221 esumcvgsum 34232 ddemeas 34380 sxbrsigalem2 34430 omssubadd 34444 carsgclctunlem3 34464 signsply0 34695 ismblfin 37982 xrgepnfd 45761 supxrgelem 45767 supxrge 45768 infrpge 45781 xrlexaddrp 45782 infleinflem1 45799 infleinf 45801 infxrpnf 45874 ge0xrre 45961 iblsplit 46394 ismbl3 46414 ovolsplit 46416 sge0cl 46809 sge0less 46820 sge0pr 46822 sge0le 46835 sge0split 46837 carageniuncl 46951 ovnsubaddlem1 46998 hspmbl 47057 pgrpgt2nabl 48842 |
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