Transcription of LinearAlgebraReviewandReference
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linear algebra Review and ReferenceZico Kolter (updated by Chuong Do)September 30, 2015 Contents1 Basic Concepts and Basic Notation .. 22 Matrix Vector-Vector Products .. Matrix-Vector Products .. Matrix-Matrix Products .. 53 Operations and The Identity Matrix and Diagonal Matrices .. The Transpose .. Symmetric Matrices .. The Trace .. Norms .. linear Independence and Rank .. The Inverse .. Orthogonal Matrices .. Range and Nullspace of a Matrix .. The Determinant .. Quadratic Forms and Positive Semidefinite Matrices.
1 Basic Concepts and Notation Linear algebra provides a way of compactly representing and operating on sets of linear equations. For example, consider the following system of equations: 4x 1 − 5x 2 = −13 −2x 1 + 3x 2 = 9. This is two equations and two variables, so as you know from high school algebra, you can find a unique solution for ...
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