Differential Equations & Linear Algebra notes

Review of lesson 5.1 for MA 262 (Linear Algebra & Differential Equations) at Purdue University. Content based on class textbook Differential Equations & Linear Algebra by C. Henry Edwards and David E. Penney (ISBN: 9780536264923). 5.1 introduces the concept of 2nd-order linear differential equations, including definitions, general form, homogeneous equations vs. nonhomogeneous equations, the principle of superposition for homogeneous equations, existence and uniqueness of solutions, the Wronsk...

Review of lesson 3.6 for MA 262 (Linear Algebra & Differential Equations) at Purdue University. Content based on class textbook Differential Equations & Linear Algebra by C. Henry Edwards and David E. Penney (ISBN: 9780536264923). 3.6 covers determinants. Specific concepts include cofactor expansion formula/procedure, Cramer's rule (definition and applications), row and column properties, and matrix transposes.

Review of lesson 4.1 for MA 262 (Linear Algebra & Differential Equations) at Purdue University. Content based on class textbook Differential Equations & Linear Algebra by C. Henry Edwards and David E. Penney (ISBN: 9780536264923). 4.1 defines vector spaces and various pertinent concepts to evaluate their existence. These include the definition and meaning of linear independence/dependence, linear combinations, span, null space, and requirements to be a vector space (closure under vector multipl...

Review of lesson 5.4 for MA 262 (Linear Algebra & Differential Equations) at Purdue University. Content based on class textbook Differential Equations & Linear Algebra by C. Henry Edwards and David E. Penney (ISBN: 9780536264923). 5.4 covers the application of differential equations (DEs) to describe mechanical vibrations, including mass-spring-dashpot systems, masses on springs, simple pendulums, free damped motion, free undamped motion, and overdamped and underdamped cases. Derivation of ap...

Review of lesson 2.2 for MA 262 (Linear Algebra & Differential Equations) at Purdue University. Content based on class textbook Differential Equations & Linear Algebra by C. Henry Edwards and David E. Penney (ISBN: 9780536264923). 2.2 covers the definition of autonomous first-order differential equations, critical points (CP) of these equations, types of behavior at critical points, criteria for each of these behaviors, and the procedure to determine the overall behavioral designation at each ...

Review of lesson 5.5 for MA 262 (Linear Algebra & Differential Equations) at Purdue University. Content based on class textbook Differential Equations & Linear Algebra by C. Henry Edwards and David E. Penney (ISBN: 9780536264923). 5.5 covers methods to solve nonhomogeneous differential equations (DEs), namely the method of undetermined coefficients and variation of parameters. Content includes the general form of a nonhomogeneous DE, the general form of a solution to a nonhomogeneous DE (comple...

Review of lesson 6.1 for MA 262 (Linear Algebra & Differential Equations) at Purdue University. Content based on class textbook Differential Equations & Linear Algebra by C. Henry Edwards and David E. Penney (ISBN: 9780536264923). 6.1 introduces eigenvalue and eigenvalues for a singular matrix (i.e. not linear system). Covers definitions of eigenvalues and eigenvectors, derivation of equations for eigenvectors/values, eigenspaces, and dimension of eigenspaces. Includes example problems.

Review of lesson 4.2 for MA 262 (Linear Algebra & Differential Equations) at Purdue University. Content based on class textbook Differential Equations & Linear Algebra by C. Henry Edwards and David E. Penney (ISBN: 9780536264923). 4.2 covers vector spaces and subspaces in further detail (from 4.1) with multiple example cases for more complex evaluations (drawn from previous exams). Includes definition of vector spaces/subspaces, distinction between trivial and proper subspaces, procedure to ex...

Review of lesson 4.3 for MA 262 (Linear Algebra & Differential Equations) at Purdue University. Content based on class textbook Differential Equations & Linear Algebra by C. Henry Edwards and David E. Penney (ISBN: 9780536264923). 4.3 covers criteria for linear independence/dependence and procedure to express a given vector as a linear combination of vectors. Reviews concepts of span, relationship between span and linear combinations, and the Rank-Nullity theorem.

Review of lesson 3.5 for MA 262 (Linear Algebra & Differential Equations) at Purdue University. Content based on class textbook Differential Equations & Linear Algebra by C. Henry Edwards and David E. Penney (ISBN: 9780536264923). 3.5 covers inverse matrices, including definitions, significance of invertibility, criteria for invertibility, and the procedure to obtain an inverse matrix.