6.28.3 Can you answer these questions?

6.28.3.1 Solving $E[abXab]=Y$ for Gaussian $(a,b)$

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=234502

I have $d/2$-dimensional variables $a,b$ jointly distributed as Gaussian($\mu,\Sigma$) in $d$ dimensions, and need to solve the following equation for $X$ 
$$E[ab^TXab^T]=Y$$ 
This is equivalent to ... 
[equation-solving] [performance-tuning] [probability-or-statistics] [linear-algebra]
 

asked by Yaroslav Bulatov https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=217 1 vote

6.28.3.2 Problem with RunProcess

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=234260

I'm trying to use the  RunProcess  function to run docker on Mac OS using Mathematica. But there is a problem: 
... 
[external-calls] [command-line]
 

asked by Wei Li https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=75601 1 vote

6.28.3.3 Does NumberLinePlot give the whole results over a large domain? Or we need to increase its precision?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=234324

I use this code over the domain $x\in(0,300)$ 
... 
[plotting]
 

asked by charmin https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=74550 1 vote