Linear Algebra and the C Language/a0hz

__NOTOC__ Triangular matrices: In mathematics, a triangular matrix is a special kind of square matrix. A square matrix is called lower triangular if all the entries above the main diagonal are zero. Similarly, a square matrix is called upper triangular if all the entries below the main diagonal are zero... Wikipedia: Triangular matrix Multiplying lower triangular matrices c00a.c Multiplying upper triangular matrices c00b.c The inverse of a lower triangular matrix: c00c.c The inverse of an upper triangular matrix: c00d.c Eigenvalues and ​​eigenvectors of a diagonal matrix: c00e.c Eigenvalues and ​​eigenvectors of a lower triangular matrix: c00e.c Eigenvalues and ​​eigenvectors of a upper triangular matrix: c00f.c Code study Diagonal matrix: rdiag_mR(); ... ... ... ... ... ... ... ... . Octave version Lower triangular matrix: rlower_mR(); ... ... ... ... ... ... ... ... Octave version Upper triangular matrix: rupper_mR(); ... ... ... ... ... ... ... ... Octave version