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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 11378 | . . 3 ⊢ ((𝐵 ∈ ℝ* ∧ 𝐴 ∈ ℝ*) → (𝐵 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐵)) | |
| 2 | 1 | con2bid 357 | . 2 ⊢ ((𝐵 ∈ ℝ* ∧ 𝐴 ∈ ℝ*) → (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴)) |
| 3 | 2 | ancoms 464 | 1 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴)) |
| Colors of variables: wff setvar class |
| This proof depends on syntax axioms: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 401 ∈ wcel 2144 class class class wbr 5102 ℝ*cxr 11346 < clt 11347 ≤ cle 11348 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1827 ax-4 1841 ax-5 1942 ax-6 1999 ax-7 2040 ax-8 2146 ax-9 2154 ax-ext 2732 ax-sep 5248 ax-pr 5390 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1572 df-fal 1582 df-ex 1812 df-sb 2099 df-clab 2739 df-cleq 2752 df-clel 2835 df-ral 3077 df-rex 3087 df-rab 3413 df-v 3452 df-ss 3896 df-dif 4047 df-in 4091 df-un 4151 df-nul 4279 df-if 4482 df-sn 4585 df-pr 4587 df-op 4835 df-br 5103 df-opab 5167 df-xp 5656 df-cnv 5658 df-le 11353 |
| This theorem is used by: xrltnled 11381 xrletri 13286 qextltlem 13336 xralrple 13339 xltadd1 13390 xsubge0 13395 xposdif 13396 xltmul1 13426 ioo0 13505 ico0 13526 ioc0 13527 snunioo 13613 snunioc 13615 difreicc 13619 hashbnd 14484 limsuplt 15652 pcadd 17073 pcadd2 17074 ramubcl 17202 ramlb 17203 leordtvallem1 23534 leordtvallem2 23535 leordtval2 23536 leordtval 23537 lecldbas 23543 blcld 24830 stdbdbl 24842 tmsxpsval2 24864 iocmnfcld 25093 xrsxmet 25135 metdsge 25175 bndth 25285 ovolgelb 25807 ovolunnul 25827 ioombl 25892 volsup2 25932 mbfmax 25976 ismbf3d 25981 itg2seq 26069 itg2monolem2 26078 itg2monolem3 26079 lhop2 26341 mdegleb 26388 deg1ge 26422 deg1add 26427 ig1pdvds 26504 plypf1 26537 radcnvlt1 26751 upgrfi 29675 xrdifh 33419 xrge00 33622 gsumesum 34738 itg2gt0cn 38687 asindmre 38715 dvasin 38716 aks6d1c6lem3 43316 aks6d1c7lem2 43325 iocioodisjd 43471 radcnvrat 45392 supxrgelem 46443 infrpge 46457 xrlexaddrp 46458 xrpnf 46589 gtnelioc 46597 ltnelicc 46603 gtnelicc 46606 snunioo1 46618 eliccnelico 46635 xrgtnelicc 46644 lptioo2 46737 stoweidlem34 47138 fourierdlem20 47231 fouriersw 47335 nltle2tri 48477 iccelpart 48609 |
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