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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 11292 | . . 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 2146 class class class wbr 5114 ℝ*cxr 11260 < clt 11261 ≤ cle 11262 |
| 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 2148 ax-9 2156 ax-ext 2738 ax-sep 5262 ax-pr 5409 |
| 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 2745 df-cleq 2758 df-clel 2841 df-ral 3083 df-rex 3093 df-rab 3420 df-v 3460 df-dif 3911 df-un 3913 df-in 3915 df-ss 3925 df-nul 4290 df-if 4493 df-sn 4595 df-pr 4597 df-op 4601 df-br 5115 df-opab 5179 df-xp 5672 df-cnv 5674 df-le 11267 |
| This theorem is used by: xrltnled 11295 xrletri 13196 qextltlem 13246 xralrple 13249 xltadd1 13300 xsubge0 13305 xposdif 13306 xltmul1 13336 ioo0 13415 ico0 13436 ioc0 13437 snunioo 13523 snunioc 13525 difreicc 13529 hashbnd 14392 limsuplt 15556 pcadd 16974 pcadd2 16975 ramubcl 17103 ramlb 17104 leordtvallem1 23404 leordtvallem2 23405 leordtval2 23406 leordtval 23407 lecldbas 23413 blcld 24699 stdbdbl 24711 tmsxpsval2 24733 iocmnfcld 24962 xrsxmet 25004 metdsge 25044 bndth 25154 ovolgelb 25676 ovolunnul 25696 ioombl 25761 volsup2 25801 mbfmax 25845 ismbf3d 25850 itg2seq 25938 itg2monolem2 25947 itg2monolem3 25948 lhop2 26211 mdegleb 26258 deg1ge 26292 deg1add 26297 ig1pdvds 26374 plypf1 26406 radcnvlt1 26618 upgrfi 29478 xrdifh 33162 xrge00 33365 gsumesum 34480 itg2gt0cn 38367 asindmre 38395 dvasin 38396 aks6d1c6lem3 42980 aks6d1c7lem2 42989 iocioodisjd 43122 radcnvrat 45065 supxrgelem 46094 infrpge 46108 xrlexaddrp 46109 xrpnf 46240 gtnelioc 46248 ltnelicc 46254 gtnelicc 46257 snunioo1 46269 eliccnelico 46286 xrgtnelicc 46295 lptioo2 46388 stoweidlem34 46789 fourierdlem20 46882 fouriersw 46986 nltle2tri 48091 iccelpart 48223 |
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