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Mee Seong Im (FALL 10-MATH125 D1, 11AM)

Email Address: mim2 (at) math (dot) uiuc (dot) edu [OR] mim2 (at) illinois (dot) edu
Mailing Address: 250 Altgeld Hall, 1409 West Green Street, Urbana, IL 61801
Office Address: 346 Illini Hall, 725 South Wright Street, Champaign, IL 61820
Office Phone Number: 001-217-333-6328
Office Hours: Tuesdays 4-6PM

This website is a brief summary of the course website. That link will be regularly updated with homework and exams and other important administrative information. You are responsible to always check back to this website for homework, grades, lecture notes, and examination announcements.


Course Textbook

The textbook for the course is Linear Algebra with Business Applications (Third Edition) by Donald R. Sherbert, John W. Brown, Omar Adawi, and Melvin Royer. Purchasing this textbook is optional. A copy of this book is available on reserve at the Math Library in Altgeld Hall and at the Grainger Engineering Library. Reserve items circulate two hours at a time. Go to the circulation desk to borrow this book.

You are however required to purchase the supplementary course lecture notes (Part 1 and Part 2) from TIS bookstore (706 South 6th Street) and bring them to every lecture. Purchase the Part 1 workbook first and if you decide to stay in the course, purchase Part 2 around the midpoint of the semester.

If late registration applies to you, then you are responsible for obtaining the lecture notes from someone in the course and keeping up with the course material. You are also responsible for reading and understanding everything in the course syllabus. To copy the lecture notes, arrange to meet with other students after class or go to the free tutoring room where you will meet MATH125 students from any of the four large lectures. Ask someone in the tutoring room if you can borrow his/her lecture notes.

You may use a TI-83, TI-83+, TI-84, or a TI-84+ (silver) calculator in class and on the examinations but you will still be required to show work in most cases. The use of any other graphing calculators (including TI-85 and above) will NOT be allowed during exams.


Additional Class Notes

• Leontief Open Models
• Span of a Vector Space 1, Span of a Vector Space 2
• Null and Column Spaces 1, Null and Column Spaces 2, Null and Column Spaces 3
• Matrix Invertibility
• Section 5.2 Practice Problems
• ProblemSet 8 Solns Page 1, ProblemSet 8 Solns Page 2, ProblemSet 8 Solns Page 3, ProblemSet 8 Solns Page 4, ProblemSet 8 Solns Page 5, ProblemSet 8 Solns Page 6, ProblemSet 8 Solns Page 7 Posted on Dec 8, 2010
• Why is the projection Proj_S(b) of a vector onto a subspace as defined and given in class really is THE projection vector Posted on Dec 9, 2010
• If v₁ is not perpendicular to v₂, how to find w so that Span{v₁, v₂} = Span{v₁,w} with w being perpendicular to v₁ [see lecture notes]
• If v₁ is not perpendicular to v₂, how to find u so that Span{v₁, v₂} = Span{v₂,u} with u being perpendicular to v₂ [see lecture notes]
• More computational problems from Chapter 5 [See pdf for the details to the solution to Problem 8.] Posted on Dec 9, 2010

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