关于有限p-群的正规闭包的一些条件

Berkovich 提出了研究满足下列条件的有限p-群G, 对于G的每一个非正规子群H满足(N₁)exp(H)=exp(H^G); (N₂) |H^G:H|≤ p; (N₃) H^G=HG''. 本文首先研究满足条件(N₃) 的有限p-群,然后讨论满足条件(N₁); (N₂) 和(N₃) 的有限p-群.     

论Szegǒ的定理

设f(z)=Z+a₂z²+…∈S.Szegǒ证明:S_n(z)=z+a₂z²+…+a_nzⁿ(n=2,3…)在|z|<1/4内单叶。ρ₀=1/4最好的,我们证明了更强的结果: 定理:若f(z)∈s.则s_n(z)(n=2,3…)在|z|<1/4内关于原点成星形。 当f∈S^*时为吴卓人所得。     

强拟星函数的Fekete-Szeg?不等式

令T(β)表示β级强拟星函数类,f(z)=z+a₂z²+a₃z³+…∈T(β),对任意实参数μ,本文得到了|a₃-μa₂²|的准确上界.     

关于α阶星像函数类的一个子类

设f(z)=z+…在单位圆|z|<1内解析.给定λ(0≤λ<1),我们定义线性算子Ω^λ Ω^λf=Γ(2-λ)z^λD_z^λf(z);和Ω^n+λf=Ωⁿ(Ω^λf),n∈N∪{0}.其中D_z^λf(z)表示f(z)的分数阶导数且Ω¹ f(z)=zf′(z).用A_{n相似文献}   

二阶抛物方程组解的Lp-正则性和Hölder连续性

在可控和自然增长条件下,非线性抛物组 u''_t-D_aA_i^a(x,t,u,Du)= B_i(x,t,u,Du),i=1,…,N,(x,t)∈Q之解。u∈L²(0,T;H¹(Ω,R^N))∩L^∞(0,T;L²(Ω,R^N))(或∩L^∞(Q,R^N))的空间导数D_au事实上属于L_loc^p(Q,R^N),p>2;拟线性抛物组 u''_t-Dα[A_ij^αβ(x,t,u)D_βu^j+a_j^a(x,t,u)]=B_i(x,t,u,Du),i=1,…,N的每一个解都在一开集 Q₁?Q上 Holder连续,且H^n+2-p(Q\Q₁)=0;若当j>i时A_ij^αβ=0,且B_i(x,t,u,p)关于|p|的增长阶小于2,则Q₁=Q;若A_ij^αβ和a_i^a都Holder连续,则D_au也在Q₁上 Holdler连续.     

关于Monogeny和Epigeny模类

设(S,≤)是严格全序幺半群,M和N是左R-模。记A=[[RS,≤]]。证明了如下结论:(1)如果(S,≤)是有限生成的且对任意s∈S有0≤s,则Epi(_[[R^S,≤]][[M^S,≤]]) = Epi(_[[R^S,≤]][[N^S,≤]])当且仅当Epi(M)=Epi(N);(2)如果(S,≤)是Artinianr ,则 Mono(_[[R^S,≤]][M^S,≤])= Mono(_[[R^S,≤]][N^S,≤])当且仅当Mono(M)=Mono(N).     

p-值星形函数的子类

Let M_n+p-1 denote the class of functions f(z) = 1/z^p+a₀/z^p-2+a₁/z^p-2+…+a_n+p-1zⁿ+…, regular and p-valent in the annulus 0<|z|<1 and satisfying Re((D^n+p f(z))/(D^n+p-1 f(z)))-2)<-(n+p-1)/(n+p),|z|<1,n>-p where D^n+p-1 f(z)=1/z^p((z^n+2p-1f(z))/(n+p-1)!)^(n+p-1).M_n+p?M_n+p-1 is proved. Since M₀ is the subclass of p-valent meromorphically starlike functions, all functions in Mn + p-1 are p-valent meromorphically star-like functions. Further the integrals of functions in M_n+p-1, are considered.     

Heisenberg群上一类左不变LPDO的局部基本解及局部可解性

In this paper it is proved that local fundamental solution exists in some space W^m(H_n) (m∈Z), if the left invariant differential operator on the Heisenberg group H_n satisfies certain condition. The main results are:l.Let L be a left invariant differential operator on H_n. If there exist R≥0, r,s∈R and operators {B_λ|λ∈Γ_R} ∈V^s(Γ_R, M^r) such that, for almost all λ∈Γ_R, B_λ is the right inverse of Ⅱ_λ(L), then there exists E∈W^m(H_n) (when m≥0 or m even) or E∈W^m-1(H_n) (when m<0 and odd) such that LE =δ(near the origie) Where m=min([r],-[2s]-n-2); 2. Let L(W,T) be of the form (3.1). If there exist R≥0 and r,s∈R such that when |λ|≥R,(?) and C_λ≥ C|λ|^x(C>0), then the same conclusion as above holds with m=min(-[2r]-n-2,[-2s]-n-2).     

n阶泛函微分方程边值问题

本文研究下列n阶RFDE边值问题:x⁽ⁿ⁾(t)=f(t,x_t,x(t),x′(t),…,x^(n-1)(t)),　t∈［0,T ］,x(t)=φ(t),t∈［-r,0］;x′(0)=η,x″(0)=η₂,…,x^(n-2) (0)=η_n-2,x^(j)(T)=A,其中j∈I={0,1,2,…,n-1},得到了解的存在性和唯一性新的结果.     

无穷时滞Liénard方程的周期解(英文)

讨论具有无穷时滞Liénard型方程x+(?²F(x))/(?x²)x+g(t,x_t)=p(t)的周期解问题, 利用重合度理论得到了周期解存在的充分条件.