Everyone trusts the logarithm until it goes complex. We’re taught that log(xy)=log(x)+log(y), and it works beautifully… until one day, you try it with negative numbers and suddenly log(-1)=iπ=i(π+2π), ...

A logarithm is the power which a certain number is raised to get another number. Before calculators and various types of complex computers were invented it was difficult for scientists and ...