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| Mirrors > Home > MPE Home > Th. List > xrltnle | Structured version Visualization version GIF version | ||
| Description: "Less than" expressed in terms of "less than or equal to", for extended reals. (Contributed by NM, 6-Feb-2007.) |
| Ref | Expression |
|---|---|
| xrltnle | ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴)) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | xrlenlt 11201 | . . 3 ⊢ ((𝐵 ∈ ℝ* ∧ 𝐴 ∈ ℝ*) → (𝐵 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐵)) | |
| 2 | 1 | con2bid 354 | . 2 ⊢ ((𝐵 ∈ ℝ* ∧ 𝐴 ∈ ℝ*) → (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴)) |
| 3 | 2 | ancoms 458 | 1 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ wa 395 ∈ wcel 2114 class class class wbr 5086 ℝ*cxr 11169 < clt 11170 ≤ cle 11171 |
| 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 5231 ax-pr 5370 |
| 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-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-sn 4569 df-pr 4571 df-op 4575 df-br 5087 df-opab 5149 df-xp 5630 df-cnv 5632 df-le 11176 |
| This theorem is referenced by: xrltnled 11204 xrletri 13095 qextltlem 13145 xralrple 13148 xltadd1 13199 xsubge0 13204 xposdif 13205 xltmul1 13235 ioo0 13314 ico0 13335 ioc0 13336 snunioo 13422 snunioc 13424 difreicc 13428 hashbnd 14289 limsuplt 15432 pcadd 16851 pcadd2 16852 ramubcl 16980 ramlb 16981 leordtvallem1 23185 leordtvallem2 23186 leordtval2 23187 leordtval 23188 lecldbas 23194 blcld 24480 stdbdbl 24492 tmsxpsval2 24514 iocmnfcld 24743 xrsxmet 24785 metdsge 24825 bndth 24935 ovolgelb 25457 ovolunnul 25477 ioombl 25542 volsup2 25582 mbfmax 25626 ismbf3d 25631 itg2seq 25719 itg2monolem2 25728 itg2monolem3 25729 lhop2 25992 mdegleb 26039 deg1ge 26073 deg1add 26078 ig1pdvds 26155 plypf1 26187 radcnvlt1 26396 upgrfi 29174 xrdifh 32868 xrge00 33089 gsumesum 34219 itg2gt0cn 38010 asindmre 38038 dvasin 38039 aks6d1c6lem3 42625 aks6d1c7lem2 42634 iocioodisjd 42766 radcnvrat 44759 supxrgelem 45785 infrpge 45799 xrlexaddrp 45800 xrpnf 45931 gtnelioc 45939 ltnelicc 45945 gtnelicc 45948 snunioo1 45960 eliccnelico 45977 xrgtnelicc 45986 lptioo2 46079 stoweidlem34 46480 fourierdlem20 46573 fouriersw 46677 nltle2tri 47773 iccelpart 47905 |
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