How to Determine if a Matrix is invertible | Precalculus | Study.com
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How to Determine if a Matrix is invertible | Precalculus | Study.com
Learn how to Determine if a Matrix is invertible and see examples that walk through sample problems step-by-step for you to improve your math knowledge and skills.
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The classical way to invert a matrix A in a basic linear algebra course augments A by the n ×n identity matrix I and applies the Gauss-Jordan algorithm of Exercise 2 to this augmented matrix (including the solution part, i.e., the division by the pivots .ak k^(n-1)). Then A^-1 shows up where I initially was. How many floating point operations are required for this method? Compare this to the operation count of (8)/(3) n^3+𝒪(n^2) required for the same task using LU decomposition (see Example 5.5
The classical way to invert a matrix A in a basic linear algebra course augments A by the n ×n identity matrix I and applies the Gauss-Jordan algorithm of Exercise 2 to this augmented matrix (including the solution part, i.e., the division by the pivots .ak k^(n-1)). Then A^-1 shows up where I initially was. How many floating point operations are required for this method? Compare this to the operation count of (8)/(3) n^3+𝒪(n^2) required for the same task using LU decomposition (see Example 5.5
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The classical way to invert a matrix A in a basic linear algebra course augments A by the n ×n identity matrix I and applies the Gauss-Jordan algorithm of Exercise 2 to this augmented matrix (including the solution part, i.e., the division by the pivots .ak k^(n-1)). Then A^-1 shows up where I initially was. How many floating point operations are required for this method? Compare this to the operation count of (8)/(3) n^3+𝒪(n^2) required for the same task using LU decomposition (see Example 5.5
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