Solving Riccati DE's with initial conditions?



The contrib_ode package and its subsidiary functions can easily solve a
Riccati equation such as

y' = x^2+y^2

But I can't find any way (at least in the package itself), of solving an
initial value problem; say:

y' = x^2+y^2, y(1)=0.

I've tried using "atvalue" but the answer is still given in terms of an
arbitrary constant %c of integration.  Is there something I'm missing
here?  None of the problems in the de_test.txt file contain initial
conditions.

Thanks,
Alasdair

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