简介:证明了以Legendre多项式的极值点为插值结点组的Grünwald插值多项式在L2范数下是收敛的.
简介:睁开双眼,我看到的是摇曳在空中那被风吹动的树叶。细细的呼啸声与耳膜产生共鸣,使我不禁感到一丝凉意。天气阴沉,应该是快要下雨了吧。我甩了甩脑袋,试图使自己的头脑清醒一下。长时间躺在这公园的长椅上使我感到腰酸背疼,是该起身活动活动筋骨了啊。
简介:InthispaperitturnsoutthataBanachlatticeXisorderisomorphictol~1(Γ)forsomenonemptysetΓiffitisaSchurspaceandalltheinfinitelydimensional,separableandclosedidealsofXareorderisomorphic.
简介:Letf(x)∈C[-1,1],pn*(x)bethebestapproximationpolynomialofdegreentof(x).G.Iorentzconjecturedthatifforalln,p2n*(x)=p2n+1*(x),thenfiseven;andifp2n+1*(x)=p2n+2*(x),po*(z)=0,thenfisodd.Inthispaper,itisprovedthat,undertheL1-norm,theLorentzconjectureisvalidconditionally,i.e.if(i)(1-x2)f(x)canbeextendedtoanabsolutelyconvergentTehebyshevsories;(ii)foreveryn,f(x)-p2n+1*(x)hasexactly2n+2zeros(or,inthearcondsituation,f(x)-p2n+2*(x)hasexaetly2n+3zeros),thenLorentzconjectureisvalid.
简介:大学自主是激发大学活力、潜力,培养创新人才的基本条件。落实和扩大高校自主权必须更新理念,深化高等教育管理体制机制改革,走出"一放就乱,一乱就收,一收就死"的怪圈。作者从国家、大学、市场、社会的互动关系,大学自主的本质、边界、局限等视角出发,提出更新理念、走出怪圈的五条建议或路径:在大学毕业生就业实现由市场调节后,大学招生数量、专业和要求由大学自主决定,走完大学招生和分配在国家宏观调控下的市场化进程;建立权威、公正、公开、透明、有公信力的质量监控机制;保障大学自主,大学章程通过立法程序变成法律;保障社会参与,赋予大学理事会一定的决策参与权;完善党委领导下的校长负责制,建立大学校长公开遴选制度。
简介:identification and classification of learning strategy. The problems are reviewed concerning the definition and classification of learning strategies and then the paper tentatively introduces Cohen’s approach to defining learning strategies in terms of prototypicality of features of learning strategies.,Cohen’s attempt to describe the prototypicality of strategies is a step forward concerning defining learning strategies. It might reflect the nature of learning strategies to a large extent because the answers to the questionnaire come from strategy experts. It is true that some problems still exist. For example,all-or-nothing feature but in terms of how far along a continuum a feature could possibly go before it stopped being descriptive of a strategy. This is an approach of defining learning strategies in terms of how prototypical the feature was. These features as follows are arranged in a descending order of agreement
简介:Radialfunctionshavebecomeausefultoolinnumericalmathematics.Onthespheretheyhavetobeidentifiedwiththezonalfunctions.Weinvestigatezonalpolynomialswithmassconcentrationatthepole,inthesenseoftheirL1-normisattainingtheminimumvalue.Suchpolynomialssatisfyacomplicatedsystemofnonlineare-quations(algebraicifthespacedimensionisodd,only)andalsoasingulardifferentialequationofthirdorder.Theexactorderofdecayoftheminimumvaluewithrespecttothepolynomialdegreeisdetermined.Byourresultswecanprovethatsomenodalsystemsonthesphere,whicharedefinedbyaminimum-property,areprovidingfundamentalmatriceswhicharediagonal-dominantorboundedwithrespecttothe∞-norm,atleast,asthepolynomialdegreetendstoinfinity.