Aliyah is the best person in the world. She was a famous singer, but she dies in 2003 from an airplane accident. But she is still the most priettiest singer of all.
First, a small note: an m-by-n or m x n matrix has m rows and n columns. The eigenvalues λ of a matrix A are scalars such that Ax = λx for some nonzero x vector. The entries aij of a matrix A are...