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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 11197 | . . 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 2113 class class class wbr 5098 ℝ*cxr 11165 < clt 11166 ≤ cle 11167 |
| 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 2115 ax-9 2123 ax-ext 2708 ax-sep 5241 ax-nul 5251 ax-pr 5377 |
| 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 2715 df-cleq 2728 df-clel 2811 df-ral 3052 df-rex 3061 df-rab 3400 df-v 3442 df-dif 3904 df-un 3906 df-ss 3918 df-nul 4286 df-if 4480 df-sn 4581 df-pr 4583 df-op 4587 df-br 5099 df-opab 5161 df-xp 5630 df-cnv 5632 df-le 11172 |
| This theorem is referenced by: xrltnled 11200 xrletri 13067 qextltlem 13117 xralrple 13120 xltadd1 13171 xsubge0 13176 xposdif 13177 xltmul1 13207 ioo0 13286 ico0 13307 ioc0 13308 snunioo 13394 snunioc 13396 difreicc 13400 hashbnd 14259 limsuplt 15402 pcadd 16817 pcadd2 16818 ramubcl 16946 ramlb 16947 leordtvallem1 23154 leordtvallem2 23155 leordtval2 23156 leordtval 23157 lecldbas 23163 blcld 24449 stdbdbl 24461 tmsxpsval2 24483 iocmnfcld 24712 xrsxmet 24754 metdsge 24794 bndth 24913 ovolgelb 25437 ovolunnul 25457 ioombl 25522 volsup2 25562 mbfmax 25606 ismbf3d 25611 itg2seq 25699 itg2monolem2 25708 itg2monolem3 25709 lhop2 25976 mdegleb 26025 deg1ge 26059 deg1add 26064 ig1pdvds 26141 plypf1 26173 radcnvlt1 26383 upgrfi 29164 xrdifh 32860 xrge00 33096 gsumesum 34216 itg2gt0cn 37876 asindmre 37904 dvasin 37905 aks6d1c6lem3 42426 aks6d1c7lem2 42435 iocioodisjd 42575 radcnvrat 44555 supxrgelem 45582 infrpge 45596 xrlexaddrp 45597 xrpnf 45729 gtnelioc 45737 ltnelicc 45743 gtnelicc 45746 snunioo1 45758 eliccnelico 45775 xrgtnelicc 45784 lptioo2 45877 stoweidlem34 46278 fourierdlem20 46371 fouriersw 46475 nltle2tri 47559 iccelpart 47679 |
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