issue 1 publication date 2020-04

• On Total Edge Irregularity Strength of Staircase Graphs and Related Graphs
• On the Diophantine Equation x^6+ky^3=z^6+kw^3
• Sums of Strongly z-Ideals and Prime Ideals in ${mathcal{R}} L$
• Characterization of $mathrm{PSL}(5,q)$ by its Order and One Conjugacy Class Size
• The Banach Type Contraction for Mappings on Algebraic Cone Metric Spaces Associated with An Algebraic Distance and Endowed with a Graph
• On the Prime Spectrum of Torsion Modules
• Harmonicity and Minimality of Vector Fields on Lorentzian Lie Groups
• New Integral Inequalities Through the phi-Preinvexity
• Quotient G-systems and Green\'s Relations
• Comparing Model-based Versus K-means Clustering for the Planar Shapes
• Extensions of Some Fixed Point Theorems for Weak-Contraction Mappings in Partially Ordered Modular Metric Spaces
• On Identities with Additive Mappings in Rings
• The Dynamical Analysis of a Delayed Prey-Predator Model with a Refuge-Stage Structure Prey Population