4.27.3 Can you answer these questions?

4.27.3.1 Unexpected Behavior of Parametric Sensitivity in ParametricNDSolveValue

https://mathematica.stackexchange.com/questions/151294/unexpected-behavior-of-parametric-sensitivity-in-parametricndsolvevalue

 
While exploring alternative methods of solving 33538, I encountered difficulties with the parametric sensitivity capability of ParametricNDSolveValue.  (Useful background on parametric sensitivity is  ...
 

- asked by bbgodfrey 2votes

4.27.3.2 FindShortestTour suddenly runs far slower for large numbers of points

https://mathematica.stackexchange.com/questions/151513/findshortesttour-suddenly-runs-far-slower-for-large-numbers-of-points

 
I was doing a benchmark of FindShortestTour and I noticed something really weird. Around 10000 points, FindShortestTour suddenly takes 6 times as long without explanation: 
 
times = Table[ 
pts =  ...
 

- asked by Jorge Perez 2votes

4.27.3.3 Manual CellGroups: problem with closing nested CellGroupData

https://mathematica.stackexchange.com/questions/151336/manual-cellgroups-problem-with-closing-nested-cellgroupdata

 
Background 
 
CellGroupData second argument allows to specify which cells are visible. I faced problems though. 
 
This example works well, the second group is not visible: 
 
Notebook[{ 
Cell @  ...
 

- asked by Kuba 1vote

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