7.12.3 Can you answer these questions?

7.12.3.1 pure function assignment

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=243708

I do not understand this statement from the Introduction to Dynamic tutorial: 
... 
[dynamic] [assignment] [pure-function]
 

asked by Dave https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=79143 1 vote

answered by MarcoB https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=27951 0 votes

7.12.3.2 Graphics get cropped when wrapped in Hyperlink and Inset in MMA 12.2 (doesn't seem to happen on 12.1 RPi) Bug?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=243637

I've noticed that wrapping a  Graphic[]  in  Hyperlink[]  causes weird things to happen when using ... 
[graphics] [bugs] [hyperlink] [inset]
 

asked by Mike H https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=79121 1 vote

7.12.3.3 Does Mathematica have build-in function to compute dimension of square polynomial system?

https://mathematica.stackexchange.com/landing/r/digest?cta=question&id=243849

I'm working with square polynomial systems and wish to know if a (small) system has a finite number of solutions. That is, if it's zero-dimensional.  I'm not aware of any built-in function to do this ... 
[polynomials] [groebner-bases] [roots]
 

asked by Dominic https://mathematica.stackexchange.com/landing/r/digest?cta=user&id=47466 1 vote