I'm currently working with the optimization module in COMSOL 5.2 on mac osx, using the built in parameter estimation step. I'm using the Levenberg-Marquardt solver with the numeric gradient method, although I believe these options are available for all gradient methods in this solver.
Under the optimization solver settings window, there are two options for which I have been unable to find any documentation:
Control variable tolerance factor (default=1)
Defect reduction tolerance factor (default = 0ff, toggle on default = 1)
I can't find any mention of these in the documentation. I examined the reference noted at the end of the Levenberg-Marquardt description in the documentation but wasn't able to find a clear description there either. I have some guesses for what the control var tolerance factor is, but I have no idea what defeat reduction is. Can you provide a description or reference for these settings? Or am I just missing something in the documentation? Thanks!
Under the optimization solver settings window, there are two options for which I have been unable to find any documentation:
Control variable tolerance factor (default=1)
Defect reduction tolerance factor (default = 0ff, toggle on default = 1)
I can't find any mention of these in the documentation. I examined the reference noted at the end of the Levenberg-Marquardt description in the documentation but wasn't able to find a clear description there either. I have some guesses for what the control var tolerance factor is, but I have no idea what defeat reduction is. Can you provide a description or reference for these settings? Or am I just missing something in the documentation? Thanks!