4 papers
A weighted Birkhoff orthogonal James-type constant
Junxiang Qi, Zhouping Yin, Qi Liu +1
Let be a real Banach space and . Motivated by orthogonal versions of the James constant, we introduce the weighted Birkhoff orthogonal James-type constant $$J_λ^{\…
Some inequalities and geometric constants in p-normed spaces
Zhiyao Fang, Qi Liu, Yuxin Wang +1
In this paper, we study some geometric constants in complete -normed spaces with . We introduce a new symmetric geometric constant associated with isosceles orthog…
Generalized geometric constants related to Birkhoff orthogonality in Banach spaces
Junxiang Qi, Qian Li, Zhouping Yin +4
In this paper, based on Birkhoff orthogonality, we introduce two geometric constants and $\boldsymbol{D}_{\boldsy…
Hyers-Ulam-Rassias stability of functional equations with parameters
Jing Zhang, Qi Liu, Yongmo Hu +6
This paper explores the Hyers-Ulam stability of generalized Jensen additive and quadratic functional equations in \(β\)-homogeneous \(F\)-space, showing that approximately satisfy…