P. 244, line -11

The line should be

$\underset{0}{\overset{t}{\int }}{\mathrm{\Xi }}^{-1}(\tau )g(\tau )d\tau =\underset{0}{\overset{t}{\int }}\left[\begin{array}{c}-\frac{1}{2}\\ \frac{1}{2}{e}^{-2\tau }\end{array}\right]d\tau =\left[\begin{array}{c}-\frac{1}{2}t\\ \frac{1}{4}(1-e^{-2t})\end{array}\right].$

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