IMHO, generally there isn't anything particularly great with a dumb evolutionary approach over a intelligent coordinated communal approach. Talking about optimization strategies... Local optimization always has the potential to get stuck at one point. So some diversity is unavoidable to overcome su...

... The fragmentation caused by all the different approaches to the assembly problem are counter productive and should not really happen. ... There is no fragmentation. Because free software is not intelligent design, it's evolution. Originally there was Assembly2. As this project died out, A2plus ...

I have this one. Might help. https://drive.google.com/file/d/1Z_rX5Eci1E3PHQXJWbswlOtjp_RH63MU Thank you, now I got it. Unfortunately, it isn't the exact book I was after. The book I found was "Numerical Optimization" by Jorge Nocedal and Stephen J. Wright. The one you sent me is "Nu...

back in the days when I implemented dogleg and LM solvers I closely followed a paper (or excerpt of a bock, not sure anymore). This one, maybe? https://link.springer.com/chapter/10.1007%2F0-387-22742-3_18 I have this one. Might help. https://drive.google.com/file/d/1Z_rX5Eci1E3PHQXJWbswlOtjp_RH63MU

In case you missed it, Ben Kenwright, the author of the Dual Quaternion papers people have posted, has authored a paper on programming rigid body constraint and physics solvers. Maybe the approaches are similar for constraints solvers alone or they could be made compatible with a future solvers that...

Back then when I tried to write a 3d solver for assemblies I failed for that very reason: standard numeric solvers are unable to cope with the fact that rotational and transitional degrees of freedom have different sensitivities, a unit change in the parameter leads to to massively different change...

Sorry, I know this sounds dumb but is this merge part of FreeCAD 0.19 Daily?

Thank you Realthunder, Wmayer and all others involved in this step towards a stronger FreeCAD with an assembly.

The "Material Point Method" may hold more promise for this type of analysis: Nice! Thanks. Also, I have been in contact with one author from this paper https://www.researchgate.net/publication/322688604_A_Computationally_Efficient_Finite_Element_Framework_to_Simulate_Additive_Manufacturin...

I send requests to two sources and have received nothing back even after reminders. Maybe something will show up next week but I doubt it.