 Chapter 1: Systems of Linear Equations and Matrices
 Chapter 1.1: Introduction to Systems of Linear Equations
 Chapter 1.2: Gaussian Elimination
 Chapter 1.3: Matrices and Matrix Operations
 Chapter 1.4: Inverses; Algebraic Properties of Matrices
 Chapter 1.5: Elementary Matrices and a Method for Finding A1
 Chapter 1.6: More on Linear Systems and Invertible Matrics
 Chapter 1.7: Diagonal, Triangular, and Symmetric Matrices
 Chapter 1.8: Applications of Linear Systems
 Chapter 1.9: Leontief InputOutput Models
 Chapter 10.1: Constructing Curves and Surfaces Through Specified Points
 Chapter 10.10: Computer Graphics
 Chapter 10.11: Equilibrium Temperature Distributions
 Chapter 10.12: Computed Tomography
 Chapter 10.13: Fractals
 Chapter 10.14: Chaos
 Chapter 10.15: Cryptography
 Chapter 10.16: Genetics
 Chapter 10.17: AgeSpecific Population Growth
 Chapter 10.18: Harvesting of Animal Populations
 Chapter 10.19: A Least Squares Model for Human Hearing
 Chapter 10.2: Geometric Linear Programming
 Chapter 10.20: Warps and Morphs
 Chapter 10.3: The Earliest Applications of Linear Algebra
 Chapter 10.4: Cubic Spline Interpolation
 Chapter 10.5: Markov Chains
 Chapter 10.6: Graph Theory
 Chapter 10.7: Games of Strategy
 Chapter 10.8: Leontief Economic Models
 Chapter 10.9: Forest Management
 Chapter 2: Determinants
 Chapter 2.1: Determinants by Cofactor Expansion
 Chapter 2.2: Evaluating Determinants by Row Reduction
 Chapter 2.3: Properties of Determinants; Cramer's Rule
 Chapter 3: Euclidean Vector Spaces
 Chapter 3.1: Vectors in 2Space, 3Space, and nSpace
 Chapter 3.2: Norm, Dot Product, and Distance in Rn
 Chapter 3.3: Orthogonality
 Chapter 3.4: The Geometry of Linear Systems
 Chapter 3.5: Cross Product
 Chapter 4: General Vector Spaces
 Chapter 4.1: Real Vector Spaces
 Chapter 4.10: Properties of Matrix Transformations
 Chapter 4.11: Geometry of Matrix Operators on
 Chapter 4.12: Dynamical Systems and Markov Chains
 Chapter 4.2: Subspaces
 Chapter 4.3: Linear Independence
 Chapter 4.4: Coordinates and Basis
 Chapter 4.5: Dimension
 Chapter 4.6: Change of Basis
 Chapter 4.7: Row Space, Column Space, and Null Space
 Chapter 4.8: Rank, Nullity, and the Fundamental Matrix Spaces
 Chapter 4.9: Matrix Transformations from Rn to Rm
 Chapter 5: Eigenvalues and Eigenvectors
 Chapter 5.1: Eigenvalues and Eigenvectors
 Chapter 5.2: Diagonalization
 Chapter 5.3: Complex Vector Spaces
 Chapter 5.4: Differential Equations
 Chapter 6: Inner Product Spaces
 Chapter 6.1: Inner Products
 Chapter 6.2: Inner Products
 Chapter 6.3: GramSchmidt Process; QRDecomposition
 Chapter 6.4: Best Approximation; Least Squares
 Chapter 6.5: Least Squares Fitting to Data
 Chapter 6.6: Function Approximation; Fourier Series
 Chapter 7: Diagonalization and Quadratic Forms
 Chapter 7.1: Orthogonal Matrices
 Chapter 7.2: Orthogonal Diagonalization
 Chapter 7.3: Quadratic Forms
 Chapter 7.4: Optimization Using Quadratic Forms
 Chapter 7.5: Hermitian, Unitary, and Normal Matrices
 Chapter 8: Linear Transformation
 Chapter 8.1: General Linear Transformations
 Chapter 8.2: Isomorphism
 Chapter 8.3: Compositions and Inverse Transformations
 Chapter 8.4: Matrices for General Linear Transformations
 Chapter 8.5: Similarity
 Chapter 9: Numerical Methods
 Chapter 9.1: LUDecompositions
 Chapter 9.2: The Power Method
 Chapter 9.3: Internet Search Engines
 Chapter 9.4: Comparison of Procedures for Solving Linear Systems
 Chapter 9.5: Singular Value Decomposition
Elementary Linear Algebra: Applications Version 10th Edition  Solutions by Chapter
Full solutions for Elementary Linear Algebra: Applications Version  10th Edition
ISBN: 9780470432051
Elementary Linear Algebra: Applications Version  10th Edition  Solutions by Chapter
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Change of basis matrix M.
The old basis vectors v j are combinations L mij Wi of the new basis vectors. The coordinates of CI VI + ... + cnvn = dl wI + ... + dn Wn are related by d = M c. (For n = 2 set VI = mll WI +m21 W2, V2 = m12WI +m22w2.)

Cholesky factorization
A = CTC = (L.J]))(L.J]))T for positive definite A.

Circulant matrix C.
Constant diagonals wrap around as in cyclic shift S. Every circulant is Col + CIS + ... + Cn_lSn  l . Cx = convolution c * x. Eigenvectors in F.

Commuting matrices AB = BA.
If diagonalizable, they share n eigenvectors.

Determinant IAI = det(A).
Defined by det I = 1, sign reversal for row exchange, and linearity in each row. Then IAI = 0 when A is singular. Also IABI = IAIIBI and

Factorization
A = L U. If elimination takes A to U without row exchanges, then the lower triangular L with multipliers eij (and eii = 1) brings U back to A.

Full column rank r = n.
Independent columns, N(A) = {O}, no free variables.

Fundamental Theorem.
The nullspace N (A) and row space C (AT) are orthogonal complements in Rn(perpendicular from Ax = 0 with dimensions rand n  r). Applied to AT, the column space C(A) is the orthogonal complement of N(AT) in Rm.

lAII = l/lAI and IATI = IAI.
The big formula for det(A) has a sum of n! terms, the cofactor formula uses determinants of size n  1, volume of box = I det( A) I.

Linear transformation T.
Each vector V in the input space transforms to T (v) in the output space, and linearity requires T(cv + dw) = c T(v) + d T(w). Examples: Matrix multiplication A v, differentiation and integration in function space.

Markov matrix M.
All mij > 0 and each column sum is 1. Largest eigenvalue A = 1. If mij > 0, the columns of Mk approach the steady state eigenvector M s = s > O.

Pseudoinverse A+ (MoorePenrose inverse).
The n by m matrix that "inverts" A from column space back to row space, with N(A+) = N(AT). A+ A and AA+ are the projection matrices onto the row space and column space. Rank(A +) = rank(A).

Rank r (A)
= number of pivots = dimension of column space = dimension of row space.

Right inverse A+.
If A has full row rank m, then A+ = AT(AAT)l has AA+ = 1m.

Skewsymmetric matrix K.
The transpose is K, since Kij = Kji. Eigenvalues are pure imaginary, eigenvectors are orthogonal, eKt is an orthogonal matrix.

Solvable system Ax = b.
The right side b is in the column space of A.

Standard basis for Rn.
Columns of n by n identity matrix (written i ,j ,k in R3).

Sum V + W of subs paces.
Space of all (v in V) + (w in W). Direct sum: V n W = to}.

Symmetric factorizations A = LDLT and A = QAQT.
Signs in A = signs in D.

Vandermonde matrix V.
V c = b gives coefficients of p(x) = Co + ... + Cn_IXn 1 with P(Xi) = bi. Vij = (Xi)jI and det V = product of (Xk  Xi) for k > i.