12.9.3 Can you answer these questions?

12.9.3.1 Using HighlightGraph on multigraphs

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=318906

I have a following (edge tagged) graph $g$ and want to highlight 
its spanning tree. 
... 
[graphs-and-networks] [bugs]
 

asked by A. Kato https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=62063 Score of 2

12.9.3.2 Is there a symbol or construct that when passed as argument returns the caller?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=318892

Like  Identity  when passed an argument it returns that argument. 
 Identity[x] 
 
gives 
 
x 
 
Is there a similar symbol or construct <... 
[evaluation] [functional-style] [upvalues]
                                                                                  

                                                                                  
 

asked by MA- https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=13892 Score of 1

12.9.3.3 Rule 30: Finding a closed formula for the $S_m$ subset recurrence

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=318912

Hello everyone, 
I'm working on the two-dimensional sequence of integers $C_{m,r}$ that arises from evaluating a discrete, second-order nonlinear recurrence natively in the binomial basis. By executing ... 
[nonlinear] [combinatorics] [boolean-computation] [cellular-automata]
 

asked by TigranNersissian https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=92143 Score of 1