👉 Presolve is a mathematical concept in computer science that refers to the process of finding solutions for equations by checking them against a set of known solutions. It is often used when solving systems of linear equations or when trying to find the inverse of a matrix. Presolving can be useful because it allows one to quickly and easily verify whether a given solution satisfies an equation. In computer science, this involves using algorithms such as LU decomposition and QR factorization to transform large matrices into simpler forms that can be solved