Being a weblog devoted to a variety of topics. Including Mathematics. And Mathematical Finance. Sometimes with homework.

Monday, September 27, 2010

21-260: Week #6

The reading and homework assignments for Week #6 have been posted. You can follow the link from the schedule page.

Friday, September 17, 2010

21-370: Week #5

The reading and homework assignment for Week #5 have been posted.

Friday, September 10, 2010

21-260: Week #4

The reading and homework assignments for Week #4 have been posted. Follow the link from the Schedule page.

21-370: Homework - Week#4

The reading and homework assignments for Week #4 have been posted. You can follow the link from the Schedule page.

Tuesday, September 7, 2010

21-260: Pay No Attention to the Hint for Problem 2.1.23b

The WileyPLUS "Hint" for this problem is incorrect. The "transition from one type of behavior to another" is this: for some initial conditions, the solutions increase without bound as t approaches infinity; for other initial conditions, the solutions decrease without bound. You want to find the initial condition y(0)=a_0 that identifies the solution that separates these two types of behavior. The solution doesn't involve finding derivatives and setting them equal to zero.