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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 11302 | . . 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 2145 class class class wbr 5107 ℝ*cxr 11270 < clt 11271 ≤ cle 11272 |
| This proof depends on axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1828 ax-4 1842 ax-5 1943 ax-6 2000 ax-7 2041 ax-8 2147 ax-9 2155 ax-ext 2734 ax-sep 5255 ax-pr 5402 |
| This proof depends on definitions: df-bi 210 df-an 402 df-or 862 df-3an 1105 df-tru 1573 df-fal 1583 df-ex 1813 df-sb 2100 df-clab 2741 df-cleq 2754 df-clel 2837 df-ral 3079 df-rex 3089 df-rab 3415 df-v 3455 df-dif 3905 df-un 3907 df-in 3909 df-ss 3919 df-nul 4283 df-if 4486 df-sn 4588 df-pr 4590 df-op 4594 df-br 5108 df-opab 5172 df-xp 5665 df-cnv 5667 df-le 11277 |
| This theorem is used by: xrltnled 11305 xrletri 13208 qextltlem 13258 xralrple 13261 xltadd1 13312 xsubge0 13317 xposdif 13318 xltmul1 13348 ioo0 13427 ico0 13448 ioc0 13449 snunioo 13535 snunioc 13537 difreicc 13541 hashbnd 14404 limsuplt 15570 pcadd 16987 pcadd2 16988 ramubcl 17116 ramlb 17117 leordtvallem1 23441 leordtvallem2 23442 leordtval2 23443 leordtval 23444 lecldbas 23450 blcld 24737 stdbdbl 24749 tmsxpsval2 24771 iocmnfcld 25000 xrsxmet 25042 metdsge 25082 bndth 25192 ovolgelb 25714 ovolunnul 25734 ioombl 25799 volsup2 25839 mbfmax 25883 ismbf3d 25888 itg2seq 25976 itg2monolem2 25985 itg2monolem3 25986 lhop2 26249 mdegleb 26296 deg1ge 26330 deg1add 26335 ig1pdvds 26412 plypf1 26445 radcnvlt1 26661 upgrfi 29556 xrdifh 33259 xrge00 33462 gsumesum 34577 itg2gt0cn 38432 asindmre 38460 dvasin 38461 aks6d1c6lem3 43046 aks6d1c7lem2 43055 iocioodisjd 43203 radcnvrat 45146 supxrgelem 46175 infrpge 46189 xrlexaddrp 46190 xrpnf 46321 gtnelioc 46329 ltnelicc 46335 gtnelicc 46338 snunioo1 46350 eliccnelico 46367 xrgtnelicc 46376 lptioo2 46469 stoweidlem34 46870 fourierdlem20 46963 fouriersw 47067 nltle2tri 48209 iccelpart 48341 |
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