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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 10695 | . . 3 ⊢ ((𝐵 ∈ ℝ* ∧ 𝐴 ∈ ℝ*) → (𝐵 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐵)) | |
2 | 1 | con2bid 358 | . 2 ⊢ ((𝐵 ∈ ℝ* ∧ 𝐴 ∈ ℝ*) → (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴)) |
3 | 2 | ancoms 462 | 1 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 399 ∈ wcel 2111 class class class wbr 5030 ℝ*cxr 10663 < clt 10664 ≤ cle 10665 |
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 1911 ax-6 1970 ax-7 2015 ax-8 2113 ax-9 2121 ax-10 2142 ax-11 2158 ax-12 2175 ax-ext 2770 ax-sep 5167 ax-nul 5174 ax-pr 5295 |
This theorem depends on definitions: df-bi 210 df-an 400 df-or 845 df-3an 1086 df-tru 1541 df-ex 1782 df-nf 1786 df-sb 2070 df-mo 2598 df-eu 2629 df-clab 2777 df-cleq 2791 df-clel 2870 df-nfc 2938 df-ral 3111 df-rex 3112 df-v 3443 df-dif 3884 df-un 3886 df-in 3888 df-ss 3898 df-nul 4244 df-if 4426 df-sn 4526 df-pr 4528 df-op 4532 df-br 5031 df-opab 5093 df-xp 5525 df-cnv 5527 df-le 10670 |
This theorem is referenced by: xrletri 12534 qextltlem 12583 xralrple 12586 xltadd1 12637 xsubge0 12642 xposdif 12643 xltmul1 12673 ioo0 12751 ico0 12772 ioc0 12773 snunioo 12856 snunioc 12858 difreicc 12862 hashbnd 13692 limsuplt 14828 pcadd 16215 pcadd2 16216 ramubcl 16344 ramlb 16345 leordtvallem1 21815 leordtvallem2 21816 leordtval2 21817 leordtval 21818 lecldbas 21824 blcld 23112 stdbdbl 23124 tmsxpsval2 23146 iocmnfcld 23374 xrsxmet 23414 metdsge 23454 bndth 23563 ovolgelb 24084 ovolunnul 24104 ioombl 24169 volsup2 24209 mbfmax 24253 ismbf3d 24258 itg2seq 24346 itg2monolem2 24355 itg2monolem3 24356 lhop2 24618 mdegleb 24665 deg1ge 24699 deg1add 24704 ig1pdvds 24777 plypf1 24809 radcnvlt1 25013 upgrfi 26884 xrdifh 30529 xrge00 30720 gsumesum 31428 itg2gt0cn 35112 asindmre 35140 dvasin 35141 radcnvrat 41018 supxrgelem 41969 infrpge 41983 xrlexaddrp 41984 xrltnled 41995 xrpnf 42125 gtnelioc 42128 ltnelicc 42134 gtnelicc 42137 snunioo1 42149 eliccnelico 42166 xrgtnelicc 42175 lptioo2 42273 stoweidlem34 42676 fourierdlem20 42769 fouriersw 42873 nltle2tri 43870 iccelpart 43950 |
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