Henri,
thank you for GLPK.js and the subsequent work. I did have a time where
Google SS couldn't solve my model claiming it non-linear. I have since
looking for a way to make Google SS works. With your constribution, I
can now concentrate on the task at hand rather than searching for
suitable solver for Google SS (in fact, there is none even though Google
had a project on linear programming). Also, thanks for login via Google.
Previously I had have problems creating account in MathP.org. I'm
currently taking a Coursera.org class on linear optimization. I was
looking forward to making use of MathP.org for the class. Cheers. Simon.