% 9.5; heat conduction, boundary value problem, superposition, separation of variables solution
 % 9.5; ice-pack ends, insulated ends, Dirichlet problem, Neuman problem, Robin problem
 % 9.6; string vibrations, infinite wave d'Alembert solution, finite wave separation of variables solution
\begin{alltt}
 HW 15, due by 6pm on May 4 under the door JWB 113
 \BF{9.5}: 1, 2, \bx{3}, \bx{7}, \bx{9}
 \BF{9.6}: 1,  \bx{5}
\end{alltt}