This is the webpage for Lecture 3 of 21241 at CMU Fall 2016 semester. I will try to keep it clear and simple.
Instructor

Tutor

Can be downloaded here.
Lectures take place on MWF 12:301:20pm in Wean Hall 5403.
Recitations for Sec. F on Thursday 09:3010:20am in Wean Hall 5310 and for Sec. G on 1:302:20pm in BH 235A.
If I find a perfect solution among your Assignment, I will sometimes scan it, make it anonymous, and upload it. If you recognize your solution and don't want it to be on my webpage, you can just contact me and I'll take it off.
Week #1
Aug 29  Sep 2 Assignment  S 
M: Systems of linear equations. Vectors.
W: Matrices, row equivalence, operations. F: Gaussian elimination, reduced row echelon form. 
Week #2
Sep 5  Sep 9 Assignment  S 
M: Labor day, no class.
W: Statements, operators, quantifiers, negating a statement, definitions. F: Theorems, proofs, proof techniques (contraposition, contradiction, induction, cases...) 
Week #3
Sep 12  Sep 16 Assignment  S 
M: Abstract vector spaces. Subspaces.
W: Subspaces, spanning sets. F: Geometry of linear equations in R^n : row by row, column by column, normal form approaches. 
Week #4
Sep 19  Sep 23 Assignment  Sol 
M: Vector form and affine spaces.
W: Linear transformations. F: Matrix algebra: product. 
Week #5
Sep 26  Sep 30 Assignment  Sol  S 
M: Matrix algebra: properties, product partitioning, transpose.
W: Review and exercise session. F: The inverse of a matrix. 
Week #6
Oct 3  Oct 7 Assignment  Sol  S 
M: Midterm #1 and solution.
W: Elementary matrices, fundamental theorem of invertible matrices. F: Columnspace, rowspace, nullspace of a matrix. 
Week #7
Oct 10  Oct 14 Assignment  Sol  S 
M: Computing bases of row, column, and nullspaces.
W: Bases, dimension. Rank theorem. F: Consequences of rank theorem. Coordinates. 
Week #8
Oct 17  Oct 21 Assignment  Sol  S 
M: Introduction to eigenvalues.
W: Eigenspaces. Determinant. Laplace's expansion theorem. F: Midsemester break, no class. 
Week #9
Oct 24  Oct 28 Assignment  S 
M: Elementary row and column operations and determinant.
W: Determinant of a product. Geometrical interpretation of det. Application: polynomial fitting. F: Back to eigenvalues: existence, properties. 
Week #10
Oct 31  Nov 4 
M: Matrix similarity. Diagonalizable matrices.
W: Diagonalization. Application to dynamical systems. F: Applications. 
Week #11
Nov 7  Nov 11 Assignment  Sol. 
M: Midterm #2 and solution.
W: Orthogonality. F: Orthogonal matrices. 
Week #12
Nov 14  Nov 18 Assignment  Sol. 
M: Orthogonal complement. Orthogonal projection.
W: Orthogonal direct sum. The GramSchmidt process 1/2. F: The GramSchmidt process 2/2 
Week #13
Nov 21  Nov 25 
M: Change of basis matrices.
W: Thanksgiving recess, no class. F: Thanksgiving recess, no class. 
Week #14
Nov 28  Dec 2 Assignment  Sol. 
M: The matrix of a linear transformation (Marco Caroccia).
W: Composition, product. F: "Similar matrices are matrices of the same transformation in different bases". 
Week #15
Dec 5  Dec 9 
M: Orthogonal diagonalization of real symmetric matrices.
W: Review & question session. F: Review & question session. 
Week #16
Dec 12  Dec 16 
M: Final exam and solution.
