Search

We shall discuss three generalized moduli such as generalized modulus of convexity, modulus of smoothness, and modulus of Zou-Cui of quasi-Banach spaces and give some important properties of these moduli. Furthermore, we establish relationships of these generalized moduli with each other. [ABSTRACT FROM AUTHOR]

The aim of this report is to study modulus of convexity δB of a quasi-Banach space B. We prove that δB is convex, continuous, nondecreasing and for arbitrary uniformly convex quasi-Banach space B, δB ... We also prove that a quasi-Banach space B is uniformly convex if and only if δB(∈) ≥ 0. Moreover we prove that a non-trivial quasi-Banach space B is uniformly non-square if and only if δB(∈) > 0. [ABSTRACT FROM AUTHOR]

The aim of this report is to study modulus of convexity δB of a quasi-Banach space B. We prove that δB is convex, continuous, nondecreasing and for arbitrary uniformly convex quasi-Banach space B, δB(∊) = 1 - 1/C√1 - ∊2C2/4 . We also prove that a quasi-Banach space B is uniformly convex if and only if δB(∊) ≥ 0. Moreover we prove that a non-trivial quasi-Banach space B is uniformly non-square if and only if δB(∊) > 0. [ABSTRACT FROM AUTHOR]

The generalized von Neumann-Jordan constant C(p)NJ (B) and the James constant J(B) for a quasi-Banach space were introduced in [7]. In this note, it is shown that C(p)NJ (B) ≥ 2 for any quasi-Banach space B andC(p)NJ (B) < 2 if and only if B is uniformly non-square. Along with relationship between J(B) and C(p)NJ (B), the criterion for the uniformily smooth quasi-Banach space is also established. [ABSTRACT FROM AUTHOR]