Hollow matrix

A **hollow matrix** typically refers to a type of matrix structure where the majority of the elements are zero, and the non-zero elements are arranged in such a way that they form a specific pattern or shape. This term can apply in various mathematical or computational contexts, such as: 1. **Sparse Matrix**: A hollow matrix can be considered a sparse matrix, where most of the elements are zero. Sparse matrices are often encountered in scientific computing, especially when dealing with large datasets.