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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 11355 | . . 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 5103 ℝ*cxr 11323 < clt 11324 ≤ cle 11325 |
| 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 2733 ax-sep 5249 ax-pr 5391 |
| 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 2740 df-cleq 2753 df-clel 2836 df-ral 3078 df-rex 3088 df-rab 3414 df-v 3453 df-dif 3902 df-un 3904 df-in 3906 df-ss 3916 df-nul 4280 df-if 4483 df-sn 4585 df-pr 4587 df-op 4591 df-br 5104 df-opab 5168 df-xp 5657 df-cnv 5659 df-le 11330 |
| This theorem is used by: xrltnled 11358 xrletri 13263 qextltlem 13313 xralrple 13316 xltadd1 13367 xsubge0 13372 xposdif 13373 xltmul1 13403 ioo0 13482 ico0 13503 ioc0 13504 snunioo 13590 snunioc 13592 difreicc 13596 hashbnd 14460 limsuplt 15626 pcadd 17047 pcadd2 17048 ramubcl 17176 ramlb 17177 leordtvallem1 23508 leordtvallem2 23509 leordtval2 23510 leordtval 23511 lecldbas 23517 blcld 24804 stdbdbl 24816 tmsxpsval2 24838 iocmnfcld 25067 xrsxmet 25109 metdsge 25149 bndth 25259 ovolgelb 25781 ovolunnul 25801 ioombl 25866 volsup2 25906 mbfmax 25950 ismbf3d 25955 itg2seq 26043 itg2monolem2 26052 itg2monolem3 26053 lhop2 26315 mdegleb 26362 deg1ge 26396 deg1add 26401 ig1pdvds 26478 plypf1 26511 radcnvlt1 26727 upgrfi 29651 xrdifh 33354 xrge00 33557 gsumesum 34673 itg2gt0cn 38561 asindmre 38589 dvasin 38590 aks6d1c6lem3 43190 aks6d1c7lem2 43199 iocioodisjd 43345 radcnvrat 45257 supxrgelem 46293 infrpge 46307 xrlexaddrp 46308 xrpnf 46439 gtnelioc 46447 ltnelicc 46453 gtnelicc 46456 snunioo1 46468 eliccnelico 46485 xrgtnelicc 46494 lptioo2 46587 stoweidlem34 46988 fourierdlem20 47081 fouriersw 47185 nltle2tri 48327 iccelpart 48459 |
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