Every $\Delta^0_2$ degree is a strong degree of categoricity; Positive Enumerable Functors; Which Classes of Structures Are Both Pseudo-elementary and Definable by an Infinitary Sentence?

Linear functions are used to model a broad range of real-world problems. The ability to solve linear equations and inequalities is an essential skill for analysing these models. This section covers ...

Symbol equations always take the form, reactants → products. A + sign separates two or more reactants or products. State symbols are used in symbol equations to show whether each chemical is a ...

Coefficient matrix of linear equations from finite element method (FEM) is sparse and symmetrical. For the sake of saving CPU operational time and reducing storing requirement to computer, we ...