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Премиум
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    What is linear algebra?
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    Linear algebra applications
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    An enticing start to a linear algebra course!
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    How best to learn from this course
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    Maximizing your Udemy experience
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    Using MATLAB, Octave, or Python in this course
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    Algebraic and geometric interpretations of vectors
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    Vector addition and subtraction
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    Vector-scalar multiplication
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    Vector-vector multiplication: the dot product
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    Dot product properties: associative, distributive, commutative
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    Code challenge: dot products with matrix columns
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    Vector length
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    Dot product geometry: sign and orthogonality
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    Code challenge: dot product sign and scalar multiplication
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    Code challenge: is the dot product commutative?
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    Vector Hadamard multiplication
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    Outer product
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    Vector cross product
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    Vectors with complex numbers
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    Hermitian transpose (a.k.a. conjugate transpose)
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    Interpreting and creating unit vectors
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    Code challenge: dot products with unit vectors
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    Dimensions and fields in linear algebra
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    Subspaces
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    Subspaces vs. subsets
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    Span
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    Linear independence
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    Basis
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    Matrix terminology and dimensionality
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    A zoo of matrices
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    Matrix addition and subtraction
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    Matrix-scalar multiplication
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    Code challenge: is matrix-scalar multiplication a linear operation?
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    Transpose
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    Complex matrices
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    Diagonal and trace
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    Code challenge: linearity of trace
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    Broadcasting matrix arithmetic
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    Introduction to standard matrix multiplication
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    Four ways to think about matrix multiplication
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    Code challenge: matrix multiplication by layering
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    Matrix multiplication with a diagonal matrix
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    Order-of-operations on matrices
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    Matrix-vector multiplication
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    2D transformation matrices
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    Code challenge: Pure and impure rotation matrices
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    Code challenge: Geometric transformations via matrix multiplications
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    Additive and multiplicative matrix identities
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    Additive and multiplicative symmetric matrices
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    Hadamard (element-wise) multiplication
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    Code challenge: symmetry of combined symmetric matrices
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    Multiplication of two symmetric matrices
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    Code challenge: standard and Hadamard multiplication for diagonal matrices
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    Code challenge: Fourier transform via matrix multiplication!
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    Frobenius dot product
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    Matrix norms
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    Code challenge: conditions for self-adjoint
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    What about matrix division?
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    Rank: concepts, terms, and applications
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    Computing rank: theory and practice
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    Rank of added and multiplied matrices
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    Code challenge: reduced-rank matrix via multiplication
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    Code challenge: scalar multiplication and rank
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    Rank of A^TA and AA^T
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    Code challenge: rank of multiplied and summed matrices
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    Making a matrix full-rank by "shifting"
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    Code challenge: is this vector in the span of this set?
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    Course tangent: self-accountability in online learning
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    Column space of a matrix
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    Column space, visualized in code
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    Row space of a matrix
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    Null space and left null space of a matrix
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    Column/left-null and row/null spaces are orthogonal
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    Dimensions of column/row/null spaces
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    Example of the four subspaces
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    More on Ax=b and Ax=0
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    Systems of equations: algebra and geometry
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    Converting systems of equations to matrix equations
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    Gaussian elimination
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    Echelon form and pivots
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    Reduced row echelon form
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    Code challenge: RREF of matrices with different sizes and ranks
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    Matrix spaces after row reduction
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    Determinant: concept and applications
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    Determinant of a 2x2 matrix
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    Code challenge: determinant of small and large singular matrices
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    Determinant of a 3x3 matrix
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    Code challenge: large matrices with row exchanges
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    Find matrix values for a given determinant
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    Code challenge: determinant of shifted matrices
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    Code challenge: determinant of matrix product
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    Matrix inverse: Concept and applications
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    Computing the inverse in code
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    Inverse of a 2x2 matrix
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    The MCA algorithm to compute the inverse
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    Code challenge: Implement the MCA algorithm!!
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    Computing the inverse via row reduction
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    Code challenge: inverse of a diagonal matrix
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    Left inverse and right inverse
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    One-sided inverses in code
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    Proof: the inverse is unique
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    Pseudo-inverse, part 1
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    Code challenge: pseudoinverse of invertible matrices
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    Projections in R^2
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    Projections in R^N
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    Orthogonal and parallel vector components
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    Code challenge: decompose vector to orthogonal components
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    Orthogonal matrices
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    Gram-Schmidt procedure
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    QR decomposition
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    Code challenge: Gram-Schmidt algorithm
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    Matrix inverse via QR decomposition
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    Code challenge: Inverse via QR
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    Code challenge: Prove and demonstrate the Sherman-Morrison inverse
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    Code challenge: A^TA = R^TR
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    Introduction to least-squares
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    Least-squares via left inverse
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    Least-squares via orthogonal projection
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    Least-squares via row-reduction
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    Model-predicted values and residuals
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    Least-squares application 1
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    Least-squares application 2
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    Code challenge: Least-squares via QR decomposition
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    What are eigenvalues and eigenvectors?
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    Finding eigenvalues
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    Shortcut for eigenvalues of a 2x2 matrix
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    Code challenge: eigenvalues of diagonal and triangular matrices
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    Code challenge: eigenvalues of random matrices
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    Finding eigenvectors
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    Eigendecomposition by hand: two examples
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    Diagonalization
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    Matrix powers via diagonalization
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    Code challenge: eigendecomposition of matrix differences
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    Eigenvectors of distinct eigenvalues
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    Eigenvectors of repeated eigenvalues
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    Eigendecomposition of symmetric matrices
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    Eigenlayers of a matrix
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    Code challenge: reconstruct a matrix from eigenlayers
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    Eigendecomposition of singular matrices
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    Code challenge: trace and determinant, eigenvalues sum and product
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    Generalized eigendecomposition
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    Code challenge: GED in small and large matrices
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    Singular value decomposition (SVD)
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    Code challenge: SVD vs. eigendecomposition for square symmetric matrices
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    Relation between singular values and eigenvalues
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    Code challenge: U from eigendecomposition of A^TA
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    Code challenge: A^TA, Av, and singular vectors
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    SVD and the four subspaces
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    Spectral theory of matrices
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    SVD for low-rank approximations
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    Convert singular values to percent variance
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    Code challenge: When is UV^T valid, what is its norm, and is it orthogonal?
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    SVD, matrix inverse, and pseudoinverse
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    Condition number of a matrix
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    Code challenge: Create matrix with desired condition number
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    The quadratic form in algebra
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    The quadratic form in geometry
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    The normalized quadratic form
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    Code challenge: Visualize the normalized quadratic form
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    Eigenvectors and the quadratic form surface
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    Application of the normalized quadratic form: PCA
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    Quadratic form of generalized eigendecomposition
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    Matrix definiteness, geometry, and eigenvalues
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    Proof: A^TA is always positive (semi)definite
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    Proof: Eigenvalues and matrix definiteness