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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 13073 | . 2 ⊢ (𝐴 ∈ ℝ* → ¬ +∞ < 𝐴) | |
| 2 | pnfxr 11193 | . . 3 ⊢ +∞ ∈ ℝ* | |
| 3 | xrlenlt 11204 | . . 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 5086 +∞cpnf 11170 ℝ*cxr 11172 < clt 11173 ≤ cle 11174 |
| 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 5232 ax-pow 5303 ax-pr 5371 ax-un 7683 ax-cnex 11088 ax-resscn 11089 |
| 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 3391 df-v 3432 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4275 df-if 4468 df-pw 4544 df-sn 4569 df-pr 4571 df-op 4575 df-uni 4852 df-br 5087 df-opab 5149 df-xp 5631 df-cnv 5633 df-pnf 11175 df-mnf 11176 df-xr 11177 df-ltxr 11178 df-le 11179 |
| This theorem is referenced by: pnfged 13076 xnn0n0n1ge2b 13077 0lepnf 13078 nltpnft 13110 xrre2 13116 xnn0lem1lt 13190 xleadd1a 13199 xlt2add 13206 xsubge0 13207 xlesubadd 13209 xlemul1a 13234 elicore 13345 elico2 13357 iccmax 13370 elxrge0 13404 nfile 14315 hashdom 14335 hashdomi 14336 hashge1 14345 hashss 14365 hashge2el2difr 14437 pcdvdsb 16834 pc2dvds 16844 pcaddlem 16853 xrsdsreclblem 21405 leordtvallem1 23188 lecldbas 23197 isxmet2d 24305 blssec 24413 nmoix 24707 nmoleub 24709 xrtgioo 24785 xrge0tsms 24813 metdstri 24830 nmoleub2lem 25094 ovolf 25462 ovollb2 25469 ovoliun 25485 ovolre 25505 voliunlem3 25532 volsup 25536 icombl 25544 ioombl 25545 ismbfd 25619 itg2seq 25722 dvfsumrlim 26011 dvfsumrlim2 26012 radcnvcl 26398 logfacbnd3 27203 log2sumbnd 27524 tgldimor 28587 xrdifh 32871 xrge0tsmsd 33152 unitssxrge0 34063 tpr2rico 34075 lmxrge0 34115 esumle 34221 esumlef 34225 esumpinfval 34236 esumpinfsum 34240 esumcvgsum 34251 ddemeas 34399 sxbrsigalem2 34449 omssubadd 34463 carsgclctunlem3 34483 signsply0 34714 ismblfin 37999 xrgepnfd 45782 supxrgelem 45788 supxrge 45789 infrpge 45802 xrlexaddrp 45803 infleinflem1 45820 infleinf 45822 infxrpnf 45895 ge0xrre 45982 iblsplit 46415 ismbl3 46435 ovolsplit 46437 sge0cl 46830 sge0less 46841 sge0pr 46843 sge0le 46856 sge0split 46858 carageniuncl 46972 ovnsubaddlem1 47019 hspmbl 47078 pgrpgt2nabl 48857 |
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