@PeterTamaroff YOU do not need to be an expert in riemann mappings , topology or complex analysis to do the computation or understand the principle. I said " a bit "
If you need a bit of A , to be an expert in B , and you are not an expert in B , do you know how important A is ??? Thats my point.
"basics " is subjective. what you find alot ? When do you know the basics of number theory ? is that fermats little or FLT or in the middle ? where exactly ???
@AndrewSalmon They are the classes the equivalence relation of "conjugation" gives rise to.
@AndrewSalmon We have a group, and we can define an equivalence relation on it by saying that $x\sim y$ if there exists $a\in G$ such that $axa^{-1}=y$.
@OldJohn, I looked up Tenerife. There is no such place. On the other hand, the Disney company dumped a bunch of landfill and made an island off Africa, built a bunch of stuff, and started pretending that was Tenerife. About 1960, that was.
@WillJagy totally coincidental, but one or two places I have left have also gone downhill - I reckon it is my sense of leaving places when I get a sense that they starting to deteriorate ...
