11.11.3 Can you answer these questions?

11.11.3.1 How to Copy/Paste From Mathematica into Excel (Revisited)

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=311805

About 7 years ago I asked how to copy/paste a table from Mathematica into Excel. At the time, several solutions worked. 
Now it seems that none of the solutions work. When I copy a table in Mathematica,... 
[formatting] [excel] [table]
 

asked by GregH https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=4393 Score of 1

11.11.3.2 Possible ways to increase the speed of integral calculations

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=311821

The code below is used to calculate the matrix elements  He . However, the calculation of each element takes a very long time. 
Question: How can the speed of these ... 
[calculus-and-analysis] [numerical-integration] [matrix] [mathematical-optimization] [integral-equations]
 

asked by Mam Mam https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=88159 Score of 1

11.11.3.3 How to calculate the perturbation for Ricci scalar squared

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=311791

Consider a perturbation for this metric: 
$$ 
ds^2= \left(g_{\alpha\beta}+ \delta g_{\alpha\beta} \right) dx^\alpha dx^\beta  , 
$$ 
in the form: 
\begin{eqnarray} 
\delta g_{00}&=&- a^2(\tau)\left( ... 
[calculus-and-analysis] [symbolic] [physics] [tensors] [differential-geometry]
 

asked by Dr. phy https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=65669 Score of 1