Jen Paulhus, Ph.D.

Linear Algebra

email: paulhus@math.grinnell.edu     pgp key
Jen Office Hours:
    Monday 10:00 AM - 12:00 PM
    or by appointment

Jasper Office Hours:
    Sunday 8:00-10:00 PM
    Monday 8:00-10:00 PM
    Wednesday 8:00-10:00 PM
    Thursday 8:00-9:00 PM

Class Meetings: 8:30-9:50 AM Monday, Tuesday, Thursday, Friday
WebEx Links: See PWeb

Text: Linear Algebra, by Joseph Mileti (available on PWeb or to order through Premiere Printing)

Syllabus
Homework

Daily Topics

Class Date Section(s) Covered Pages Topics Related Content
Oct. 29 1.1 5-10 introduction 3Blue1Brown S1 E1
Oct. 30 1.2-1.3 14-22 , 44-45 mathematical statements, negation, quantifiers, examples
Nov. 2 1.3-1.4 23-26, 45-48 if...then...
Nov. 3 1.5 31-37 subsets, proving sets are equal, operations on sets
Nov. 5 1.6-1.8, 2.1-2.2 37-44,48-56 functions, solving equations, intersection of lines, vectors Khan Academy Vector Introduction
Nov. 6 2.3 56-65 span 3Blue1Brown S1 E2 first 6 minutes only
Nov. 9 2.3 65-68 more on span, geometry in R2 Khan Academy Linear Combinations and Span
Nov. 10 2.4 69-75 intro to linear transformations Khan Academy Visualizing Linear Transformations
Nov. 12 2.4 76-82 transformations on basis elements 3Blue1Brown S1 E3 first 6.5 minutes only
Nov. 13 2.5 82-92 standard matrix, matrix-vector product, projections and rotations
Nov. 16 2.6-2.7 92-103 matrix algebra, range 3Blue1Brown S1 E4 and Khan Academy Intro to matrix multiplication
Nov. 17 Exam 1 5-74 1.1-2.4
Nov. 19 2.7-3.1 104-122 range and null space, inverses, invertible matrix, coordinate transformation see videos on Piazza
Nov. 20 3.3 132-138 eigenvalues and eigenvectors
Nov. 23 3.2 122-127 eigenspace, matrices with respect to other coordinates 3Blue1Brown S1 E13
Nov. 24 3.2, 3.3 128-131, 139-140,144-146 diagonal matrix
Asynch. 4.2 169-176 solving linear systems worksheet and 3Blue1Brown S1 E7 first 7:50 and from 10:35 on
Nov. 30 3.3, 3.4, 4.1 140-144, 150-156, 157-161 diagonalization, determinants, and introduction to vector spaces
Dec. 1 4.1, 4.2 161-169,176 properties of v-spaces, subspaces, echelon form 3Blue1Brown S1 E15 and first 9 minutes
Dec. 3 4.2, 4.3 177-187 reduced echelon form, spanning sequences Khan Academy Matrices for Solving Systems
Dec. 4 4.4, 4.5 188-193 linear independence 3Blue1Brown S1 E2 6:00 and on
Dec. 7 4.4, 4.5 194-205 basis, forming bases
Dec. 8 Exam 2 76-185 2.4-4.2
Dec. 10 4.6, 5.1 205-217 dimension, linear transformations 3Blue1Brown S1 E5 and 3Blue1Brown S1 E8 and TheTrevTutor Dimension
Dec. 11 5.1,5.2 218-232 matrices, range, null space
Dec. 14 233-242 Rank-Nullity Theorem, column space Rank-Nullity Intuition and 3Blue1Brown S1 E7
Dec. 15 5.2-5.3 243-253 inverses, determinants 3Blue1Brown S1 E6 and Khan Academy Finding Inverses and Determinants
Dec. 17 5.4 253-261 inner product, orthonormal basis, decompositions
Dec 21 Final Exam

Homework Assignments

Make sure you are familiar with the Academic Honesty policies for the class. Problem sets will be submitted and returned on Gradescope, while writing assignments will be submitted on PWeb and returned on OneDrive. You will be encouraged to use LaTeX to write your solutions. Brief solutions to homeworks will also be posted on PWeb.

HW Due Date Problems
# PS 1 Oct. 30 [pdf]
# PS 2 Nov. 2 [pdf]
# WA 1 Nov. 3 [pdf]
# PS 3 Nov. 5 [pdf]
# PS 4 Nov. 6 [pdf]
# PS 5 Nov. 9 [pdf]
# WA 2 Nov. 10 [pdf]
# PS 6 Nov. 12 [pdf]
# PS 7 Nov. 13 [pdf]
Nov. 16 no homework
Exam 1 Nov. 17 no homework
# PS 8 Nov. 19 [pdf]
# PS 9 Nov. 20 [pdf]
# PS 10 Nov. 23 [pdf]
# PS 11 Nov. 24 [pdf]
# PS 12 Nov. 30 [pdf]
# WA 3 Dec. 1 [pdf]
# PS 13 Dec. 3 [pdf]
# PS 14 Dec. 4 [pdf]
Dec. 7 no homework
Exam 2 Dec. 8 no homework
# WA 4 Dec. 10 [pdf]
# PS 15 Dec. 11 [pdf]
# PS 16 Dec. 14 [pdf]
# WA 5 Dec. 15 [pdf]
# PS 17 Dec. 17 [pdf]