# Trace Of Matrix

Matrix has a special function called Trace function. If is a square matrix then the sum of its main diagonal entry is called trace of matrix and is denoted by .

Let be a square matrix with size , then

``````

The trace of matrix is

``````

Let is see few examples of traces of matrices.

Example #1

``````Let A be a square matrix of size

The trace of matrix is

``````

Example #2

``````Let B be a square matrix of size

The trace of matrix is

``````

If the matrix A is not a square matrix, then is not defined.

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Trace Of Matrix

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