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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 11275 | . . 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 463 | 1 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 209 ∧ wa 400 ∈ wcel 2143 class class class wbr 5110 ℝ*cxr 11243 < clt 11244 ≤ cle 11245 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1825 ax-4 1839 ax-5 1940 ax-6 1997 ax-7 2038 ax-8 2145 ax-9 2153 ax-ext 2735 ax-sep 5258 ax-pr 5406 |
| This theorem depends on definitions: df-bi 210 df-an 401 df-or 861 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1810 df-sb 2097 df-clab 2742 df-cleq 2755 df-clel 2838 df-ral 3080 df-rex 3090 df-rab 3417 df-v 3457 df-dif 3909 df-un 3911 df-in 3913 df-ss 3923 df-nul 4288 df-if 4489 df-sn 4591 df-pr 4593 df-op 4597 df-br 5111 df-opab 5175 df-xp 5669 df-cnv 5671 df-le 11250 |
| This theorem is referenced by: xrltnled 11278 xrletri 13179 qextltlem 13229 xralrple 13232 xltadd1 13283 xsubge0 13288 xposdif 13289 xltmul1 13319 ioo0 13398 ico0 13419 ioc0 13420 snunioo 13506 snunioc 13508 difreicc 13512 hashbnd 14374 limsuplt 15532 pcadd 16950 pcadd2 16951 ramubcl 17079 ramlb 17080 leordtvallem1 23348 leordtvallem2 23349 leordtval2 23350 leordtval 23351 lecldbas 23357 blcld 24643 stdbdbl 24655 tmsxpsval2 24677 iocmnfcld 24906 xrsxmet 24948 metdsge 24988 bndth 25098 ovolgelb 25620 ovolunnul 25640 ioombl 25705 volsup2 25745 mbfmax 25789 ismbf3d 25794 itg2seq 25882 itg2monolem2 25891 itg2monolem3 25892 lhop2 26155 mdegleb 26202 deg1ge 26236 deg1add 26241 ig1pdvds 26318 plypf1 26350 radcnvlt1 26562 upgrfi 29422 xrdifh 33106 xrge00 33315 gsumesum 34430 itg2gt0cn 38307 asindmre 38335 dvasin 38336 aks6d1c6lem3 42920 aks6d1c7lem2 42929 iocioodisjd 43062 radcnvrat 45007 supxrgelem 46036 infrpge 46050 xrlexaddrp 46051 xrpnf 46182 gtnelioc 46190 ltnelicc 46196 gtnelicc 46199 snunioo1 46211 eliccnelico 46228 xrgtnelicc 46237 lptioo2 46330 stoweidlem34 46731 fourierdlem20 46824 fouriersw 46928 nltle2tri 48033 iccelpart 48165 |
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