7.21.3 Can you answer these questions?

7.21.3.1 Get the list of (x,y) point of a graphic

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=250051

I have a function like this: 
 E^(-t/0.001)*Cos[t] + E^(-t/0.01)*Cos[1000 t] 
 
I used the code below as suggested in the forum to obtain the x,y values for points 
<... 
[graphics] [functions] [data]
 

asked by Michaels https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=48318 1 vote

answered by Bob Hanlon https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=9362 0 votes

7.21.3.2 Solving a matrix differential equation by using a function that takes a matrix as its argument

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=249879

I have a function  g  of the form 
 g[y_]:=A.y.B 
 
where  y  is a 2-by-2 matrix whose elements are ... 
[differential-equations] [matrix] [parametric-functions]
 

asked by user58247 https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=58247 1 vote

7.21.3.3 Inner polygon approximation

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=249824

Suppose you want to perform an inner approximation of a planar semialgebraic set by a finite set of polygons. The following is a quick way to yield an approximation but I am not convinced that it is ... 
[symbolic] [geometry] [computational-geometry] [algebraic-manipulation] [polygons]
 

asked by Math Gaudium https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=74255 2 votes