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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 11404 | . . 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 2147 class class class wbr 5106 ℝ*cxr 11372 < clt 11373 ≤ cle 11374 |
| 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 1945 ax-6 2002 ax-7 2043 ax-8 2149 ax-9 2157 ax-ext 2735 ax-sep 5253 ax-pr 5396 |
| 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 2102 df-clab 2742 df-cleq 2755 df-clel 2839 df-ral 3081 df-rex 3091 df-rab 3417 df-v 3456 df-ss 3901 df-dif 4050 df-in 4094 df-un 4154 df-nul 4282 df-if 4486 df-sn 4589 df-pr 4591 df-op 4839 df-br 5107 df-opab 5172 df-xp 5662 df-cnv 5664 df-le 11379 |
| This theorem is used by: xrltnled 11407 xrletri 13312 qextltlem 13362 xralrple 13365 xltadd1 13416 xsubge0 13421 xposdif 13422 xltmul1 13452 ioo0 13531 ico0 13552 ioc0 13553 snunioo 13639 snunioc 13641 difreicc 13645 hashbnd 14510 limsuplt 15678 pcadd 17099 pcadd2 17100 ramubcl 17228 ramlb 17229 leordtvallem1 23561 leordtvallem2 23562 leordtval2 23563 leordtval 23564 lecldbas 23570 blcld 24857 stdbdbl 24869 tmsxpsval2 24891 iocmnfcld 25120 xrsxmet 25162 metdsge 25202 bndth 25312 ovolgelb 25834 ovolunnul 25854 ioombl 25919 volsup2 25959 mbfmax 26003 ismbf3d 26008 itg2seq 26096 itg2monolem2 26105 itg2monolem3 26106 lhop2 26368 mdegleb 26415 deg1ge 26449 deg1add 26454 ig1pdvds 26531 plypf1 26564 radcnvlt1 26778 upgrfi 29702 xrdifh 33445 xrge00 33651 gsumesum 34774 itg2gt0cn 38798 asindmre 38826 dvasin 38827 aks6d1c6lem3 43425 aks6d1c7lem2 43434 iocioodisjd 43581 radcnvrat 45501 supxrgelem 46564 infrpge 46578 xrlexaddrp 46579 xrpnf 46710 gtnelioc 46718 ltnelicc 46724 gtnelicc 46727 snunioo1 46739 eliccnelico 46756 xrgtnelicc 46765 lptioo2 46858 stoweidlem34 47259 fourierdlem20 47352 fouriersw 47456 nltle2tri 48598 iccelpart 48730 |
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