对于一个满足“强Lefschetz条件”的K?hler SL-G-流形(X,ω),本文在弦上同调Hk(X,G)上构造了一个Hodge结构,在素弦上同调FHk(X,ω,G)上构造了一个极化Hodge结构,然后通过弦Do
The severe acute respiratory syndrome COVID-19 was discovered on Decem-ber 31,2019 in China.Subsequently,many COVID-19 cases were reported in many other countri
In this article,we established the structure of all eigenvalues and the oscillation property of corresponding eigenfunctions for discrete clamped beam equation △4u(k-2)=λm(k)u(k),k∈[2,N+1]Z,u(0)=△u(0)=0=u(N+2)=△u(N+2)with the weight function m:
In this paper,we study the proximal relation,regionally proximal relation and Banach proximal relation of a topological dynamical system for amenable group acti
In the present paper,we have discussed the commutativity of prime rings and extended some well known results concerning derivation and generalized derivations to b-generalized derivations.
本文利用初等方法以及同余方程解的个数,研究一类广义Gauss和四次均值的计算问题,并给出了一个精确的计算公式.
In this paper,we propose two species competition model in a chemostat that uses a nonlocal delayed chemostat model of a single species feeding on a periodically varying input nutrient.By the theory of semigroup,the existence and uniqueness of solution of
本文研究了如下拟线性椭圆型方程Δpu=b(x)f(u),u(x)>0,x∈Ω大解的精确渐近行为,其中b∈C(Ω)是定义在Ω上非负非平凡的函数,f∈C[0,∞)∩C1(0,∞)是定义在[0,∞)上正的不减函数.具体而言,当Ω=RN(N≥3)时,我们通过区域截断技术和上下解方法研究了该方程整体大解在无穷远处的精确渐近行为.当Ω为带有C4-边界的有界区域时,我们研究了区域边界的平均曲率H(x)对边界行为的影响.因为(Δp)(p≠2)是非线性算子并且H(■)是定义在■Ω上的函数,因此该边界行为的计算和p=2
本文给出了实Banach空间中,渐近非扩张映射不动点的广义隐式双中点法则的粘性方法.在适当的参数条件下,证明了该算法生成的序列的强收敛定理.本文的结果推广和改进了其他作者的主要结果.
In this paper,dynamics analysis of a delayed HIV infection model with CTL immune response and antibody immune response is investigated.The model involves the co