GROUP THEORY, AND WHAT TO DO ABOUT OPTIONAL EXERCISES?
Joe S. Tudent's thinking:
Why should I, a graduate student and a gentleman, be doing these optional problems? Pointless, no?
Predrag's answer:
Grades will be determined from the homework (70%) and the take-home final (30%).
By doing optional problem sets you can build up capital (ie, problem set scores over 100% right) which will help you through the rough times, problems you cannot or do not have time to solve. A wise investment.

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svn: $Author: predrag $ - $Date: 2015-09-26 23:57:12 -0400 (Sat, 26 Sep 2015) $