This is a list of errors that have been found in previous versions of the problem sets.
These errors are corrected in the versions that are currently available online.


Date		Problem Set	page	
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15.10.09	1		12	OLD: u_{N-1}&=\pi-\frac{x_{N-1}-1}{2}
					NEW: u_{N-1}&=\pi-\frac{x_{N-1}}{2}