Basics of matrices

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7 Terms

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What is the trace?

Sum of all elements in the leading diagonal

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What is the identity matrix?

A square matrix where all elements of the leading diagonal are 1 and all other elements are 0

<p>A square matrix where all elements of the leading diagonal are 1 and all other elements are 0</p>
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What is the transposition of a matrix?

Where the rows of matrix A become the columns of matrix AT

<p>Where the rows of matrix A become the columns of matrix A<sup>T</sup></p>
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What is the equation for finding the determinant of a 2×2 matrix?

det(A)= ad-cb

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How do you divide a matrix by a determinant?

Multiply the matrix by 1/(ad-cb)

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What is the result when you multiply a matrix by its inverse?

The identity matrix

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