## Homework assignments for Math 28b, Spring 1998

### Problem Set 2. Due Thursday February 5, 1998

- Page 185 A1,A6.
- Pages 185-186 B1-B4.
- Suppose f:A -> B is a ring homomorphism, where A and B are rings with unity. Show that f(0) = 0. Is it true that f(1) = 1? Prove or give a counterexample.
- Page 187 E1,E7.
- Page 188 G2, H4.