Right!

yes, the 1D expression you put was the one I used.

Thank you very much for your solution. I would not have thought of this subtletiy of using value() inside plot3d.

Regards,

Francesc Moll

Sorry, I didn't realize the equation would not be posted, just the output plot.

The function is:

Sum(exp(-beta*(2*x0-1)-alpha*(2*x0-1))/(Sum(Sum(exp(-beta*(4*x0*x1-2*x0-2*x1+1)-alpha*(2*x0-1)), x1 = 0 .. 1), x0 = 0 .. 1)), x0 = 0 .. 1)

Thanks.