 Chapter 1: Matrices and Systems of Equations
 Chapter 1.1: Systems of Linear Equations
 Chapter 1.2: Row Echelon Form
 Chapter 1.3: Matrix Arithmetic
 Chapter 1.4: Matrix Algebra
 Chapter 1.5: Elementary Matrices
 Chapter 1.6: Partitioned Matrices
 Chapter 2: Determinants
 Chapter 2.1: The Determinant of a Matrix
 Chapter 2.2: Properties of Determinants
 Chapter 2.3: Additional Topics and Applications
 Chapter 3: Vector Spaces
 Chapter 3.1: Definition and Examples
 Chapter 3.2: Subspaces
 Chapter 3.3: Linear Independence
 Chapter 3.4: Basis and Dimension
 Chapter 3.5: Change of Basis
 Chapter 3.6: Row Space and Column Space
 Chapter 4: Linear Transformations
 Chapter 4.1: Definition and Examples
 Chapter 4.2: Matrix Representations of Linear Transformations
 Chapter 4.3: Similarity
 Chapter 5: Orthogonality
 Chapter 5.1: The Scalar Product in Rn
 Chapter 5.2: Orthogonal Subspaces
 Chapter 5.3: Least Squares Problems
 Chapter 5.4: Inner Product Spaces
 Chapter 5.5: Orthonormal Sets
 Chapter 5.6: The GramSchmidt Orthogonalization Process
 Chapter 5.7: Orthogonal Polynomials
 Chapter 6: Eigenvalues
 Chapter 6.1: Eigenvalues and Eigenvectors
 Chapter 6.2: Systems of Linear Differential Equations
 Chapter 6.3: Diagonalization
 Chapter 6.4: Hermitian Matrices
 Chapter 6.5: The Singular Value Decomposition
 Chapter 6.6: Quadratic Forms
 Chapter 6.7: Positive Definite Matrices
 Chapter 6.8: Nonnegative Matrices
 Chapter 7: Numerical Linear Algebra
 Chapter 7.1: FloatingPoint Numbers
 Chapter 7.2: Gaussian Elimination
 Chapter 7.3: Pivoting Strategies
 Chapter 7.4: Matrix Norms and Condition Numbers
 Chapter 7.5: Orthogonal Transformations
 Chapter 7.6: The Eigenvalue Problem
 Chapter 7.7: Least Squares Problems
Linear Algebra with Applications 9th Edition  Solutions by Chapter
Full solutions for Linear Algebra with Applications  9th Edition
ISBN: 9780321962218
Linear Algebra with Applications  9th Edition  Solutions by Chapter
Get Full SolutionsThis textbook survival guide was created for the textbook: Linear Algebra with Applications, edition: 9. Linear Algebra with Applications was written by and is associated to the ISBN: 9780321962218. This expansive textbook survival guide covers the following chapters: 47. Since problems from 47 chapters in Linear Algebra with Applications have been answered, more than 3396 students have viewed full stepbystep answer. The full stepbystep solution to problem in Linear Algebra with Applications were answered by , our top Math solution expert on 03/15/18, 05:26PM.

Big formula for n by n determinants.
Det(A) is a sum of n! terms. For each term: Multiply one entry from each row and column of A: rows in order 1, ... , nand column order given by a permutation P. Each of the n! P 's has a + or  sign.

Characteristic equation det(A  AI) = O.
The n roots are the eigenvalues of A.

Companion matrix.
Put CI, ... ,Cn in row n and put n  1 ones just above the main diagonal. Then det(A  AI) = ±(CI + c2A + C3A 2 + .•. + cnA nl  An).

Complete solution x = x p + Xn to Ax = b.
(Particular x p) + (x n in nullspace).

Diagonalizable matrix A.
Must have n independent eigenvectors (in the columns of S; automatic with n different eigenvalues). Then SI AS = A = eigenvalue matrix.

Exponential eAt = I + At + (At)2 12! + ...
has derivative AeAt; eAt u(O) solves u' = Au.

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.

Fibonacci numbers
0,1,1,2,3,5, ... satisfy Fn = Fnl + Fn 2 = (A7 A~)I()q A2). Growth rate Al = (1 + .J5) 12 is the largest eigenvalue of the Fibonacci matrix [ } A].

Hessenberg matrix H.
Triangular matrix with one extra nonzero adjacent diagonal.

Kirchhoff's Laws.
Current Law: net current (in minus out) is zero at each node. Voltage Law: Potential differences (voltage drops) add to zero around any closed loop.

Linear combination cv + d w or L C jV j.
Vector addition and scalar multiplication.

Normal equation AT Ax = ATb.
Gives the least squares solution to Ax = b if A has full rank n (independent columns). The equation says that (columns of A)·(b  Ax) = o.

Normal matrix.
If N NT = NT N, then N has orthonormal (complex) eigenvectors.

Partial pivoting.
In each column, choose the largest available pivot to control roundoff; all multipliers have leij I < 1. See condition number.

Permutation matrix P.
There are n! orders of 1, ... , n. The n! P 's have the rows of I in those orders. P A puts the rows of A in the same order. P is even or odd (det P = 1 or 1) based on the number of row exchanges to reach I.

Positive definite matrix A.
Symmetric matrix with positive eigenvalues and positive pivots. Definition: x T Ax > 0 unless x = O. Then A = LDLT with diag(D» O.

Projection p = a(aTblaTa) onto the line through a.
P = aaT laTa has rank l.

Random matrix rand(n) or randn(n).
MATLAB creates a matrix with random entries, uniformly distributed on [0 1] for rand and standard normal distribution for randn.

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

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