Q: Is null matrix is diagonal matrix?

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No. A scalar matrix is a diagonal matrix whose main diagonal elements are the same. Only if the diagonal elements are all 1 is it an identity matrix.

Yes.

It is the product of the three diagonal elements.

It will be a square matrix and, to that extent, it is diagonalisable. However, the diagonal elements need not be non-zero. It will be a square matrix and, to that extent, it is diagonalisable. However, the diagonal elements need not be non-zero. It will be a square matrix and, to that extent, it is diagonalisable. However, the diagonal elements need not be non-zero. It will be a square matrix and, to that extent, it is diagonalisable. However, the diagonal elements need not be non-zero.

there is none you weasel. the only good matrix is revolutions. :)

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Diagonal Matrix A square matrix A which is both uper-triangular and lower triangular is called a diagonal matrix. Diagonal matrix is denoted by D.

The null matrix is also called the zero matrix. It is a matrix with 0 in all its entries.

No. A scalar matrix is a diagonal matrix whose main diagonal elements are the same. Only if the diagonal elements are all 1 is it an identity matrix.

Yes.

the matrix whose entries are all 0

the matrix whose entries are all 0

It is the product of the three diagonal elements.

It is the diagonal entries of the matrix raised to a power.

A minor diagonal matrix is one where the only non-zero entries are along the diagonal that runs from bottom most left to upper most right.

It will be a square matrix and, to that extent, it is diagonalisable. However, the diagonal elements need not be non-zero. It will be a square matrix and, to that extent, it is diagonalisable. However, the diagonal elements need not be non-zero. It will be a square matrix and, to that extent, it is diagonalisable. However, the diagonal elements need not be non-zero. It will be a square matrix and, to that extent, it is diagonalisable. However, the diagonal elements need not be non-zero.

there is none you weasel. the only good matrix is revolutions. :)

Write a program in c++ that take input in a integer matrix of size 4*4 and find out if the entered matrix is diagonal or not.