M bius always does it on the same side. Algebraists do it in groups. Combinatorists do it as many ways as they can. Mathematical physicists understand the theory of how to do it, but have difficulty obtaining practical results. 07 Markov does it in chains.
Real analysts do it almost everywhere.
Statisticians probably do it. 0A Quantum physicists can either know how fast they do it, or where they do it, but not both. 0B Logicians do it by choice. Computer scientists do it depth-first. 0D Fermat tried to do it in the margin, but couldn't fit it in.