7.2.3 Can you answer these questions?

7.2.3.1 Doppler Effect - Moving Wave Source

https://tex.stackexchange.com/landing/r/digest?cta=question&id=577918

Could someone help me animate (\usepackage{pst-plot, pst-calculate, multido, animate}, preferably) a wave-point source moving with uniform speed v (the first variable) and emitting concentric wave-... 
[animate] [pst-plot] [multido] [pst-calculate]
 

asked by Savchenko https://tex.stackexchange.com/landing/r/digest?cta=user&id=177942 1 vote

7.2.3.2 Suppressing the unwanted file \newtxmath.sty appearing in "next error", previous error" when using Technic Center

https://tex.stackexchange.com/landing/r/digest?cta=question&id=577955

\documentclass[english]{book} 
[errors] [formatting]
                                                                                  

                                                                                  
 

asked by keith77777 https://tex.stackexchange.com/landing/r/digest?cta=user&id=24039 1 vote

7.2.3.3 How to add line numbers to a PDF?

https://tex.stackexchange.com/landing/r/digest?cta=question&id=578176

I am trying to add line numbers to a PDF of a thousand pages.  I only have the PDF and don't have the source text that was used to generate the PDF.  As part of my research, I have reviewed the ... 
[pdf] [pgfplotstable] [line-numbering] [linenumber]
 

asked by tommydog35 https://tex.stackexchange.com/landing/r/digest?cta=user&id=232607 1 vote