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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 11208 | . . 3 ⊢ ((𝐵 ∈ ℝ* ∧ 𝐴 ∈ ℝ*) → (𝐵 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐵)) | |
| 2 | 1 | con2bid 355 | . 2 ⊢ ((𝐵 ∈ ℝ* ∧ 𝐴 ∈ ℝ*) → (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴)) |
| 3 | 2 | ancoms 459 | 1 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 207 ∧ wa 396 ∈ wcel 2119 class class class wbr 5079 ℝ*cxr 11176 < clt 11177 ≤ cle 11178 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1802 ax-4 1816 ax-5 1917 ax-6 1974 ax-7 2015 ax-8 2121 ax-9 2129 ax-ext 2712 ax-sep 5225 ax-pr 5369 |
| This theorem depends on definitions: df-bi 208 df-an 397 df-or 854 df-3an 1094 df-tru 1550 df-fal 1560 df-ex 1787 df-sb 2074 df-clab 2719 df-cleq 2732 df-clel 2815 df-ral 3055 df-rex 3065 df-rab 3393 df-v 3434 df-dif 3893 df-un 3895 df-in 3897 df-ss 3907 df-nul 4269 df-if 4462 df-sn 4563 df-pr 4565 df-op 4569 df-br 5080 df-opab 5142 df-xp 5631 df-cnv 5633 df-le 11183 |
| This theorem is referenced by: xrltnled 11211 xrletri 13102 qextltlem 13152 xralrple 13155 xltadd1 13206 xsubge0 13211 xposdif 13212 xltmul1 13242 ioo0 13321 ico0 13342 ioc0 13343 snunioo 13429 snunioc 13431 difreicc 13435 hashbnd 14296 limsuplt 15439 pcadd 16858 pcadd2 16859 ramubcl 16987 ramlb 16988 leordtvallem1 23200 leordtvallem2 23201 leordtval2 23202 leordtval 23203 lecldbas 23209 blcld 24495 stdbdbl 24507 tmsxpsval2 24529 iocmnfcld 24758 xrsxmet 24800 metdsge 24840 bndth 24950 ovolgelb 25472 ovolunnul 25492 ioombl 25557 volsup2 25597 mbfmax 25641 ismbf3d 25646 itg2seq 25734 itg2monolem2 25743 itg2monolem3 25744 lhop2 26007 mdegleb 26054 deg1ge 26088 deg1add 26093 ig1pdvds 26170 plypf1 26202 radcnvlt1 26408 upgrfi 29185 xrdifh 32879 xrge00 33100 gsumesum 34250 itg2gt0cn 38049 asindmre 38077 dvasin 38078 aks6d1c6lem3 42664 aks6d1c7lem2 42673 iocioodisjd 42804 radcnvrat 44765 supxrgelem 45789 infrpge 45803 xrlexaddrp 45804 xrpnf 45935 gtnelioc 45943 ltnelicc 45949 gtnelicc 45952 snunioo1 45964 eliccnelico 45981 xrgtnelicc 45990 lptioo2 46083 stoweidlem34 46484 fourierdlem20 46577 fouriersw 46681 nltle2tri 47783 iccelpart 47915 |
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