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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 11240 | . . 3 ⊢ ((𝐵 ∈ ℝ* ∧ 𝐴 ∈ ℝ*) → (𝐵 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐵)) | |
| 2 | 1 | con2bid 356 | . 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 208 ∧ wa 399 ∈ wcel 2141 class class class wbr 5097 ℝ*cxr 11208 < clt 11209 ≤ cle 11210 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1814 ax-4 1828 ax-5 1929 ax-6 1986 ax-7 2027 ax-8 2143 ax-9 2151 ax-ext 2733 ax-sep 5243 ax-pr 5387 |
| This theorem depends on definitions: df-bi 209 df-an 400 df-or 859 df-3an 1099 df-tru 1562 df-fal 1572 df-ex 1799 df-sb 2090 df-clab 2740 df-cleq 2753 df-clel 2836 df-ral 3076 df-rex 3086 df-rab 3414 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4284 df-if 4478 df-sn 4580 df-pr 4582 df-op 4586 df-br 5098 df-opab 5160 df-xp 5649 df-cnv 5651 df-le 11215 |
| This theorem is referenced by: xrltnled 11243 xrletri 13148 qextltlem 13198 xralrple 13201 xltadd1 13252 xsubge0 13257 xposdif 13258 xltmul1 13288 ioo0 13367 ico0 13388 ioc0 13389 snunioo 13475 snunioc 13477 difreicc 13481 hashbnd 14342 limsuplt 15496 pcadd 16915 pcadd2 16916 ramubcl 17044 ramlb 17045 leordtvallem1 23257 leordtvallem2 23258 leordtval2 23259 leordtval 23260 lecldbas 23266 blcld 24552 stdbdbl 24564 tmsxpsval2 24586 iocmnfcld 24815 xrsxmet 24857 metdsge 24897 bndth 25007 ovolgelb 25529 ovolunnul 25549 ioombl 25614 volsup2 25654 mbfmax 25698 ismbf3d 25703 itg2seq 25791 itg2monolem2 25800 itg2monolem3 25801 lhop2 26064 mdegleb 26111 deg1ge 26145 deg1add 26150 ig1pdvds 26227 plypf1 26259 radcnvlt1 26468 upgrfi 29248 xrdifh 32942 xrge00 33152 gsumesum 34316 itg2gt0cn 38134 asindmre 38162 dvasin 38163 aks6d1c6lem3 42749 aks6d1c7lem2 42758 iocioodisjd 42889 radcnvrat 44850 supxrgelem 45873 infrpge 45887 xrlexaddrp 45888 xrpnf 46019 gtnelioc 46027 ltnelicc 46033 gtnelicc 46036 snunioo1 46048 eliccnelico 46065 xrgtnelicc 46074 lptioo2 46167 stoweidlem34 46568 fourierdlem20 46661 fouriersw 46765 nltle2tri 47867 iccelpart 47999 |
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