Why do we subtract λ from the diagonal of matrix A?
141628
How did the equation $|A- \lambda I| = 0$ came for finding Eigen values of a Matrix
10083
Determinant of matrix times a constant.
58273
What justifies this calculation of the derivative of a matrix function?
105345
Intuition for the exponential of a matrix
101452
How is the determinant related to the inverse of matrix?
60736
Looking for an intuitive explanation why the row rank is equal to the column rank for a matrix
149292
Inverse of a diagonal matrix plus a constant
92744
These two operators commute...but their eigenvectors aren't all the same. Why?
84640
Orthonormal Matrices-Intuition
97733
Can it be determined that the sum of the diagonal entries, of matrix A, equals the sum of eigenvalues of A
21885
Why is the determinant useful when finding eigenvectors?
38945
On the proof that the product of diagonal matrices is a diagonal matrix?
18456
What is the physical significance of the off-diagonal moment of inertia matrix elements?
24072
Intuitive explanation of why $\dim\operatorname{Im} T + \dim\operatorname{Ker} T = \dim V$
56312
Why can this product of rectangular matrices not be the identity matrix?
137455
How to figure out the spectral radius of this matrix
156868
Why is finding $M$ eigenvectors on smaller matrix valid?