Errata: In Example 8.4, boundary condition and coefficients for psi(x) are incorrect
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Location: page 238, line -1 and page 239, line 3
The time-varying portion of the boundary condition for the problem was not properly factored out of the expressions for 
. The boundary condition for (page 238, line -1) is 
and value of the coefficient 
(page 239, line 3) is 
.
(Contributed by A. Aryanfar, 9 Nov 2011)
