1 citations · 1 across the 8 of their papers we have counts for
8 papers
New Geometric Constant Related to the P-angle Function in Banach Spaces
Zhijian Yang, Yongjin Li
In this paper, combined with the P-angle function of Banach spaces and the geometric constants that can characterize Hilbert spaces, the new angular geometric constant is defined.…
On the stability of orthogonally Jensen additive and quadratic functional equation
Linlin Fu, Qi Liu, Yongjin Li
We consider the stability of the orthogonal Jensen additive and quadratic equations in -spaces, through applying and extending the approach to the proof of a 2010 result of W.Fr…
Ulam stability of an additive-quadratic functional equation in F-space and quasi-Banach spaces
Linlin Fu, Qi Liu, Yongjin Li
By adopting the direct method and fixed point method, we prove that the Hyers-Ulam stability of the following additive-quadratic functional equation \begin{equation} f(x+y, z+w)+f(…
On the stability of orthogonal additivity in -homogeneous -spaces and quasi-Banach spaces
Qi Liu, Linlin Fu, Yongjin Li
In this paper, we study the stability of the orthogonal equation,which is closely related to the results by Wlodzimierz Fechner and Justyna Sikorska in 2010. There are some differe…
Inscribed triangles in the unit sphere and a new class of geometric constants
Bingren Chen, Qi Liu, Yongjin Li
We will introduce a new geometric constant GL(X) based on the constant H(X) proposed by Gao. We first further survey the constant H(X) and discuss some of the properties of this co…
New geometric constants of isosceles orthogonal type
Qi Liu, Zhijian Yang, Yongjin Li
Based on the parallelogram law and isosceles orthogonality, we define a new orthogonal geometric constant. We first discuss some basic properties of this new constant. Next, we con…
Novel constants based on the generalization of Von Neumann-Jordan constant
Yuxin Wang, Qi Liu, Qian Li +4
We introduce a new geometric constant based on a generalization of the parallelogram law, and study its properties as well as some relationships with other well-known geometric con…
Solving system of Urysohn type integral equation via bicomplex partial b-metric space
Gunaseelan Mani, Arul Joseph Gnanaprakasam, Yongjin Li +1
In this paper, we introduce the notion of bicomplex partial b-metric space and prove some common fixed point theorems. Our results generalize and expand some of the literature's we…