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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 11210 | . . 3 ⊢ ((𝐵 ∈ ℝ* ∧ 𝐴 ∈ ℝ*) → (𝐵 ≤ 𝐴 ↔ ¬ 𝐴 < 𝐵)) | |
| 2 | 1 | con2bid 354 | . 2 ⊢ ((𝐵 ∈ ℝ* ∧ 𝐴 ∈ ℝ*) → (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴)) |
| 3 | 2 | ancoms 458 | 1 ⊢ ((𝐴 ∈ ℝ* ∧ 𝐵 ∈ ℝ*) → (𝐴 < 𝐵 ↔ ¬ 𝐵 ≤ 𝐴)) |
| Colors of variables: wff setvar class |
| Syntax hints: ¬ wn 3 → wi 4 ↔ wb 206 ∧ wa 395 ∈ wcel 2114 class class class wbr 5085 ℝ*cxr 11178 < clt 11179 ≤ cle 11180 |
| This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1797 ax-4 1811 ax-5 1912 ax-6 1969 ax-7 2010 ax-8 2116 ax-9 2124 ax-ext 2708 ax-sep 5231 ax-pr 5375 |
| This theorem depends on definitions: df-bi 207 df-an 396 df-or 849 df-3an 1089 df-tru 1545 df-fal 1555 df-ex 1782 df-sb 2069 df-clab 2715 df-cleq 2728 df-clel 2811 df-ral 3052 df-rex 3062 df-rab 3390 df-v 3431 df-dif 3892 df-un 3894 df-in 3896 df-ss 3906 df-nul 4274 df-if 4467 df-sn 4568 df-pr 4570 df-op 4574 df-br 5086 df-opab 5148 df-xp 5637 df-cnv 5639 df-le 11185 |
| This theorem is referenced by: xrltnled 11213 xrletri 13104 qextltlem 13154 xralrple 13157 xltadd1 13208 xsubge0 13213 xposdif 13214 xltmul1 13244 ioo0 13323 ico0 13344 ioc0 13345 snunioo 13431 snunioc 13433 difreicc 13437 hashbnd 14298 limsuplt 15441 pcadd 16860 pcadd2 16861 ramubcl 16989 ramlb 16990 leordtvallem1 23175 leordtvallem2 23176 leordtval2 23177 leordtval 23178 lecldbas 23184 blcld 24470 stdbdbl 24482 tmsxpsval2 24504 iocmnfcld 24733 xrsxmet 24775 metdsge 24815 bndth 24925 ovolgelb 25447 ovolunnul 25467 ioombl 25532 volsup2 25572 mbfmax 25616 ismbf3d 25621 itg2seq 25709 itg2monolem2 25718 itg2monolem3 25719 lhop2 25982 mdegleb 26029 deg1ge 26063 deg1add 26068 ig1pdvds 26145 plypf1 26177 radcnvlt1 26383 upgrfi 29160 xrdifh 32853 xrge00 33074 gsumesum 34203 itg2gt0cn 37996 asindmre 38024 dvasin 38025 aks6d1c6lem3 42611 aks6d1c7lem2 42620 iocioodisjd 42752 radcnvrat 44741 supxrgelem 45767 infrpge 45781 xrlexaddrp 45782 xrpnf 45913 gtnelioc 45921 ltnelicc 45927 gtnelicc 45930 snunioo1 45942 eliccnelico 45959 xrgtnelicc 45968 lptioo2 46061 stoweidlem34 46462 fourierdlem20 46555 fouriersw 46659 nltle2tri 47761 iccelpart 47893 |
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