Element-wise constraint

[mishkat1096]

Hi Thanks for the great tool. I am trying to do a Discrete material optimization (DMO). I am not sure how to apply the element-wise constraints. For example, I have several variables. But at each element, the sum should be 1.

Thanks

[Naruki-Ichihara]

Thank you. I'm sorry but the point-wise or layer-wise constraints are not supported. These constraints may result in difficulties in convergence in optimization. DMO requires the sum of the weighting vector equal to one. Do you have any idea to reduce the point-wise constraints into single global constraint function? For example, Bin Niu’s article uses DMO parameterization (see, Section 3). This formulation looks like the single parameterization and may be able to coding with optfx and fenics.

[mishkat1096]

Thanks for a quick reply. I will look at the article.

[Naruki-Ichihara]

I will implement the function for general global constraint to reduce the point-wise constraint into single constraint.

[Naruki-Ichihara]

Mistake. I open this issue again.