Contents:– Matrices—One Review; What the Volume of Matrices Says?; On Classes of Matrices with Variants of the Diagonal Dominance Property; Generalized Irreducible α-Matrices and Its Applications; Effective Methods of QR-Decompositions of Square Complex Matrices by Fast Discrete Signal-Induced Heap Transforms; Fuzzy Soft Expert Matrix Theory and Its Application in Decision-Making; A Compact Heart Iteration for Large Eigenvalues Problems; Gradient-Based Iterative Algorithm for a Coupled Complex Conjugate and Transpose Matrix Equations; Block Decompositions and Applications of Generalized Reflexive Matrices