WildLinAlg8: Inverting 3x3 matrices

WildLinAlg8: Inverting 3x3 matrices

WildLinAlg: A first course in Linear Algebra

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This is the 8th lecture in this series on Linear Algebra. Here we solve the most fundamental problem in the subject in the 3x3 case---in such a way that extension to higher dimensions becomes almost obvious. What is the fundamental problem? It is: How to invert a change of coordinates? Or in matrix terms: How to find the inverse of a matrix? And the answer rests squarely on the wonderful function called the determinant. Be prepared for some algeb...Read More
This is the 8th lecture in this series on Linear Algebra. Here we solve the most fundament...Read More