Math 304-01 Announcements

Regular Problem Session

There will be a general problem session for our class every week in LN-2298:

Wednesdays, 7:00 - 9:00 p.m.

except (instead of the Wednesday meeting):

Tuesday 10/27, 7:40--9:30.

Tuesday 11/17, 7:40--9:30.

Tuesday 11/24, 7:40--9:30 (the day before Test III).
(We meet on these Tuesdays mostly to avoid conflict with the Math Club. It will meet on Wednesday 11/18 -- see above.)

Wednesday 12/2: no meeting. Go to the Math Club movie!

Quizzes

There will be quizzes, possibly unannounced. They will cover recent material for the most part.

Hand-in Homework

Corrections to Homework Handouts

HW XVI: Wed., § 6.3: # 23(f) should be # 24(e). Handins., § 6.4: # 5(d) should be # 5(b).

General rules

Your work should:
- be stapled; no paper clips or folded corners, please;
- be neat: a clean, legible copy with no scribbles, no crossing out;
- have all stubs from spiral-notebook paper neatly cut off;
- have only one problem on each page;
- be written so ``up'' is the same way, front and back;
- show all the work you did to solve the problem, with enough explanation that I can easily tell what you are doing at each step, and with the reasons that justify your work clearly stated.
If you don't follow these rules, you're making my job harder, and I'll deduct points.
I will not accept any problem that has gross algebra errors, such as dividing by zero, calculating an inverse by (A+B)^-1 = A^-1 + B^-1, and so on. These will get an automatic zero. (Same on quizzes and tests.)

Corrections to the Textbook

In Section 3.4, # 21, there'a a slight error. The ``angle between a vector and a plane'' is the complement of the angle theta, that is, it is (pi/2) - theta.

In Section 3.5, the book calls a vector perpendicular to the plane a ``normal'' but the correct name is normal vector. Sometimes people say ``normal'' as an abbreviation, but that's not the real name.

Section 4.3:

In Example 8, there are two completely different methods given for solving the same problem. The first method is the geometrical method; this is in paragraph 1. The second method is the algebraic method; this is in paragraphs 2 and 3.
In Exercises 18 and 19, by "the type of argument given in Example 8" they mean the geometrical method. By "calculating the eignevalues ..." they mean the algebraic method.
In the answer to Exercise 19(a), the eigenvectors associated with lambda = 1 should be given by the single formula (0,s,t), not two different formulas as in the book. In Exercise 19(b), lambda = 1 should have eigenvectors given by (s,0,t), not what's in the book.

In Section 8.3 at the bottom of p. 404, the sentence "If T is one-to-one, then each vector v in V has a unique image w = T(v) in R(T)." is a mistake. Every transformation has this property. What they meant is: "If T is one-to-one, then for each vector w in R(T) there is a unique vector v in V such that w = T(v)."

In Section 8.4 on p. 412, Figure 3 and preceding sentence: ``basis for the image space'' should be ``basis for the codomain''.

Tests

Test I

The guidelines for interpreting your grade are these:

	A	B	C	D	F
	89-100	75-88	61-74	55-60	0-54

On the solutions handout, there's an error! In 4(b), in the formula for proj_a, the ||u|| in the denominator should be ||a||; thus the denominator is ||a||². Sorry about this.

Test II

The guidelines for interpreting your grade are these:

	A	B	C	D	F
	79-100	64-78	48-63	40-47	0-39

Test III

Test III was on Wed., Nov. 25. It covered all of Chapters 6 and 7. The guidelines for interpreting your grade are these:

	A	B	C	D	F
	83-100	68-82	51-67	42-50	0-41

Final Exam

The guidelines for interpreting your grade are these:

	A	B	C	D	F
	121-150	96-120	71-95	58-70	0-57

Office Hours

The course information handout has an error! The morning office hour is on Thursday, not Wednesday.

Go to 304-01 home page | homework assignments.