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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 11209 | . . 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 5100 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-pr 5379 |
| 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 3402 df-v 3444 df-dif 3906 df-un 3908 df-in 3910 df-ss 3920 df-nul 4288 df-if 4482 df-sn 4583 df-pr 4585 df-op 4589 df-br 5101 df-opab 5163 df-xp 5638 df-cnv 5640 df-le 11184 |
| This theorem is referenced by: xrltnled 11212 xrletri 13079 qextltlem 13129 xralrple 13132 xltadd1 13183 xsubge0 13188 xposdif 13189 xltmul1 13219 ioo0 13298 ico0 13319 ioc0 13320 snunioo 13406 snunioc 13408 difreicc 13412 hashbnd 14271 limsuplt 15414 pcadd 16829 pcadd2 16830 ramubcl 16958 ramlb 16959 leordtvallem1 23166 leordtvallem2 23167 leordtval2 23168 leordtval 23169 lecldbas 23175 blcld 24461 stdbdbl 24473 tmsxpsval2 24495 iocmnfcld 24724 xrsxmet 24766 metdsge 24806 bndth 24925 ovolgelb 25449 ovolunnul 25469 ioombl 25534 volsup2 25574 mbfmax 25618 ismbf3d 25623 itg2seq 25711 itg2monolem2 25720 itg2monolem3 25721 lhop2 25988 mdegleb 26037 deg1ge 26071 deg1add 26076 ig1pdvds 26153 plypf1 26185 radcnvlt1 26395 upgrfi 29176 xrdifh 32870 xrge00 33106 gsumesum 34236 itg2gt0cn 37923 asindmre 37951 dvasin 37952 aks6d1c6lem3 42539 aks6d1c7lem2 42548 iocioodisjd 42687 radcnvrat 44667 supxrgelem 45693 infrpge 45707 xrlexaddrp 45708 xrpnf 45840 gtnelioc 45848 ltnelicc 45854 gtnelicc 45857 snunioo1 45869 eliccnelico 45886 xrgtnelicc 45895 lptioo2 45988 stoweidlem34 46389 fourierdlem20 46482 fouriersw 46586 nltle2tri 47670 iccelpart 47790 |
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