R is generally used for rows and is the first letter of the English row; C is generally used in columns and is the first letter of an English column. First row. A column. One line. Column: column. A (usually) circular stone pillar. Memorial column.

In mathematics, determinant is a function of matrix A whose domain is det, and its value is scalar, which is denoted as det(A) or |A|. Whether in linear algebra, polynomial theory or calculus (such as substitution integral method), determinant, as a basic mathematical tool, has important applications. Determinant can be regarded as a generalization of the concept of directed area or volume in general Euclidean space. In other words, in N-dimensional Euclidean space, determinant describes the "volume" caused by linear transformation.