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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 11177 | . . 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 2111 class class class wbr 5089 ℝ*cxr 11145 < clt 11146 ≤ cle 11147 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1796 ax-4 1810 ax-5 1911 ax-6 1968 ax-7 2009 ax-8 2113 ax-9 2121 ax-ext 2703 ax-sep 5232 ax-nul 5242 ax-pr 5368 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 848 df-3an 1088 df-tru 1544 df-fal 1554 df-ex 1781 df-sb 2068 df-clab 2710 df-cleq 2723 df-clel 2806 df-ral 3048 df-rex 3057 df-rab 3396 df-v 3438 df-dif 3900 df-un 3902 df-ss 3914 df-nul 4281 df-if 4473 df-sn 4574 df-pr 4576 df-op 4580 df-br 5090 df-opab 5152 df-xp 5620 df-cnv 5622 df-le 11152 |
| This theorem is referenced by: xrltnled 11180 xrletri 13052 qextltlem 13101 xralrple 13104 xltadd1 13155 xsubge0 13160 xposdif 13161 xltmul1 13191 ioo0 13270 ico0 13291 ioc0 13292 snunioo 13378 snunioc 13380 difreicc 13384 hashbnd 14243 limsuplt 15386 pcadd 16801 pcadd2 16802 ramubcl 16930 ramlb 16931 leordtvallem1 23125 leordtvallem2 23126 leordtval2 23127 leordtval 23128 lecldbas 23134 blcld 24420 stdbdbl 24432 tmsxpsval2 24454 iocmnfcld 24683 xrsxmet 24725 metdsge 24765 bndth 24884 ovolgelb 25408 ovolunnul 25428 ioombl 25493 volsup2 25533 mbfmax 25577 ismbf3d 25582 itg2seq 25670 itg2monolem2 25679 itg2monolem3 25680 lhop2 25947 mdegleb 25996 deg1ge 26030 deg1add 26035 ig1pdvds 26112 plypf1 26144 radcnvlt1 26354 upgrfi 29069 xrdifh 32763 xrge00 32995 gsumesum 34072 itg2gt0cn 37725 asindmre 37753 dvasin 37754 aks6d1c6lem3 42275 aks6d1c7lem2 42284 iocioodisjd 42423 radcnvrat 44417 supxrgelem 45446 infrpge 45460 xrlexaddrp 45461 xrpnf 45593 gtnelioc 45601 ltnelicc 45607 gtnelicc 45610 snunioo1 45622 eliccnelico 45639 xrgtnelicc 45648 lptioo2 45741 stoweidlem34 46142 fourierdlem20 46235 fouriersw 46339 nltle2tri 47423 iccelpart 47543 |
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