1 “... for courses or to supplement courses in many ways. Ph.D. students will also find research problems, often...”

2 “... or to supplement them in many ways. Ph.D. students will also find research problems, often with conjectures...”

3 “... or to supplement courses in many ways. Ph.D. students will also find research problems, often with conjectures...”

4

5 “... for courses or to supplement courses in many ways. Ph.D. students will also find research problems, often...”

6 “... for courses or to supplement courses in many ways. Ph.D. students will also find research problems, often...”