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If 0 is an Eigen value of a matrix A, then the set of columns of A is

Question

If 0 is an Eigen value of a matrix A, then the set of columns of A is

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Solution

If 0 is an eigenvalue of a matrix A, then the set of columns of A is linearly dependent.

Here's why:

  1. An eigenvalue of a matrix A is a scalar (λ) such that when it is subtracted from each entry on the main diagonal of A and then the determinant is calculated, the result is zero. This is represented by the equation det(A - λI) = 0, where I is the identity matrix.

  2. If 0 is an eigenvalue, then the equation becomes det(A - 0I) = det(A), which means the determinant of A is zero.

  3. A determinant of zero indicates that the rows (and therefore the columns) of the matrix are linearly dependent.

  4. Linear dependence of columns means that one column can be represented as a linear combination of the other columns.

So, if 0 is an eigenvalue of a matrix A, then the set of columns of A is linearly dependent.

This problem has been solved

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