9.39.3 Can you answer these questions?

9.39.3.1 How to optimize ODE parameter fitting?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=292731

Consider the data 
... 
[differential-equations] [fitting] [nonlinear] [modeling]
 

asked by sam wolfe https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=64001 Score of 2

9.39.3.2 How to transform the regions in which a piecewise function are defined?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=292863

I have a function  f[x,y,z]  that has a piecewise definition, i.e., its values depends on the ranges of the arguments. Now suppose I have a coordinate transformation <... 
[regions] [code-request] [piecewise] [inequalities]
                                                                                  

                                                                                  
 

asked by user1620696 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=42643 Score of 1

answered by azerbajdzan https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=53172 Score of 0

9.39.3.3 Why PlotStyle affects style of mesh in 3D?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=292710

In the documentation of  PlotStyle  we can read: 
 
PlotStyle->None specifies that the main objects in a plot should not 
be drawn explicitly, though mesh and filling ... 
[graphics] [graphics3d]
 

asked by azerbajdzan https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=53172 Score of 3