Interactive Linear Algebra — Chapter 3: Linear Transformations and Matrix Algebra
by Dan Margalit and Joseph Rabinoff · Georgia Institute of Technology
Georgia Tech's Math 1553 text, with draggable WebGL demonstrations. Chapter 3 works through matrix transformations, one-to-one and onto maps, the proof that every linear transformation is a matrix transformation, composition, inverses, and the Invertible Matrix Theorem.
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