7.75.3 Can you answer these questions?

7.75.3.1 Empty slides (white font on white background) when compiling handouts

https://tex.stackexchange.com/landing/r/digest?cta=question&id=624555

I sometimes run into a strange problem when compiling my beamer slides for handouts. I can't figure out what causes some slides to have a white font on a white background. I observe this randomly, but ... 
[beamer] [pgfpages]
 

asked by PatrickD https://tex.stackexchange.com/landing/r/digest?cta=user&id=257775 1 vote

7.75.3.2 Change appearance of printbibliography and footnotecite

https://tex.stackexchange.com/landing/r/digest?cta=question&id=624670

I want a special appearance of my bibliography, because it is required for my reports. I have searched a lot, and it should be possible to define this with macros. But I don't understand the commands ... 
[biblatex] [bibliographystyle]
                                                                                  

                                                                                  
 

asked by Wirman https://tex.stackexchange.com/landing/r/digest?cta=user&id=257842 1 vote

7.75.3.3 Recursive definition of the Cantor Staircase

https://tex.stackexchange.com/landing/r/digest?cta=question&id=624262

I'm not the first one to try to draw the Cantor staircase, but I would like to understand why my code doesn't work. This is a minimal example : 
\documentclass{article} 
\usepackage{pgfplots} 
\... 
[tikz-pgf] [pgfplots]
 

asked by Nicolas FRANCOIS https://tex.stackexchange.com/landing/r/digest?cta=user&id=111924 1 vote