2021-01-27 13:15:30 +0200 received badge ● Student (source) 2021-01-27 13:15:13 +0200 asked a question Definite Integral of loglikelihood function multipled by Gaussian I am trying to calculate definite_integral((-ln(2*pi)-ln(sigma)-1/2*((x-mu)/sigma)^2)*f, x, -infinity, infinity)  where f=1/(sqrt(2*pi)*sigmaprime)*exp(-1/2*((x-muprime)/sigmaprime)^2)  using sagemath. I have done from sage.symbolic.integration.integral import definite_integral And I have also done assume(sigma>0) assume(sigmaprime>0)  however I obtain this error ValueError: Computation failed since Maxima requested additional constraints; using the 'assume' command before evaluation *may* help (example of legal syntax is 'assume(muprime>0)', see assume? for more details)  Is muprime positive, negative or zero? However muprime can be positive, negative or zero. So I don't know how to proceed.