%0 Journal Article
%T 关于函数类Ω_P~(r+1)[0,1]的宽度估计
%A 孙永生
%J 科学通报
%D 1984
%I 
%X §1.引言设l≥1,r=2l,t_1,…,t_l≥0,D=(d/dx),I为恒等算子,记Q_(r 1)(D)=D(D~2-f_j~2I),q_r(x)=(x~2-f_j~2),Ω_p~(r 1)0,1]={f(x);f~(r)在0,1]上绝对连续,且‖Q_(r 1)(D)f(·)‖p≤1,f~(2k-1)(0)=f~(2k-1)(1)=0,k=1,…,l},(1.1)于是,f∈Ω_p~(r 1)0,1],当且仅当
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=7C7E63796F062382A606A3A9833B8C05&jid=B40D4BA57FF46E45205A09B4DC283152&aid=877ED44FA66C071A0B31AB6336D73902&yid=36250D1D6BDC99BD&vid=771469D9D58C34FF&iid=59906B3B2830C2C5&sid=27350781F1397F32&eid=27350781F1397F32&journal_id=0023-074X&journal_name=科学通报&referenced_num=0&reference_num=0