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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 9982 | . . 3 ⊢ ((𝐵 ∈ ℝ* ∧ 𝐴 ∈ ℝ*) → (𝐵 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐵)) | |
2 | 1 | con2bid 343 | . 2 ⊢ ((𝐵 ∈ ℝ* ∧ 𝐴 ∈ ℝ*) → (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴)) |
3 | 2 | ancoms 468 | 1 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴)) |
Colors of variables: wff setvar class |
Syntax hints: ¬ wn 3 → wi 4 ↔ wb 195 ∧ wa 383 ∈ wcel 1977 class class class wbr 4583 ℝ*cxr 9952 < clt 9953 ≤ cle 9954 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1713 ax-4 1728 ax-5 1827 ax-6 1875 ax-7 1922 ax-9 1986 ax-10 2006 ax-11 2021 ax-12 2034 ax-13 2234 ax-ext 2590 ax-sep 4709 ax-nul 4717 ax-pr 4833 |
This theorem depends on definitions: df-bi 196 df-or 384 df-an 385 df-3an 1033 df-tru 1478 df-ex 1696 df-nf 1701 df-sb 1868 df-eu 2462 df-mo 2463 df-clab 2597 df-cleq 2603 df-clel 2606 df-nfc 2740 df-ral 2901 df-rex 2902 df-rab 2905 df-v 3175 df-dif 3543 df-un 3545 df-in 3547 df-ss 3554 df-nul 3875 df-if 4037 df-sn 4126 df-pr 4128 df-op 4132 df-br 4584 df-opab 4644 df-xp 5044 df-cnv 5046 df-le 9959 |
This theorem is referenced by: xrletri 11860 qextltlem 11907 xralrple 11910 xltadd1 11958 xsubge0 11963 xposdif 11964 xltmul1 11994 ioo0 12071 ico0 12092 ioc0 12093 xrge0neqmnf 12147 snunioo 12169 snunioc 12171 difreicc 12175 hashbnd 12985 limsuplt 14058 pcadd 15431 pcadd2 15432 ramubcl 15560 ramlb 15561 leordtvallem1 20824 leordtvallem2 20825 leordtval2 20826 leordtval 20827 lecldbas 20833 blcld 22120 stdbdbl 22132 tmsxpsval2 22154 iocmnfcld 22382 xrsxmet 22420 metdsge 22460 bndth 22565 ovolgelb 23055 ovolunnul 23075 ioombl 23140 volsup2 23179 mbfmax 23222 ismbf3d 23227 itg2seq 23315 itg2monolem2 23324 itg2monolem3 23325 lhop2 23582 mdegleb 23628 deg1ge 23662 deg1add 23667 ig1pdvds 23740 plypf1 23772 radcnvlt1 23976 upgrfi 25758 umgrafi 25851 xrdifh 28932 xrge00 29017 gsumesum 29448 itg2gt0cn 32635 asindmre 32665 dvasin 32666 radcnvrat 37535 supxrgelem 38494 infrpge 38508 xrlexaddrp 38509 xrltnled 38520 gtnelioc 38559 ltnelicc 38566 gtnelicc 38569 snunioo1 38585 eliccnelico 38603 xrgtnelicc 38612 lptioo2 38698 stoweidlem34 38927 fourierdlem20 39020 fouriersw 39124 nltle2tri 39942 iccelpart 39971 |
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