The equation in question 6.7, there appears to be an extra mu on the end. Please confirm if this should be there. Also Ch 6, p52, Solution to Q6.8. In the last line f(x,a(x)) has an integral from s to s. Thanks, John.
The mu is a typo - sorry for the confusion. Thanks for pointing this out though. The integral from s to s is ok. The integral is then 0 and the exponential term is 1. That's why is disappears from the last term in the equation.
