I'm a physicist and have been using Mathematica since April 2003, communicating in the newsgroup comp.soft-sys.math.mathematica until it vanished in May 2014. My activities in SE have moved more to Mathematics since Dec. 2014.

In the 1980es I pubished two books on Rubik's cube and its "relatives" which was a nice exercise in group theory.

My main interests in SE are differential equations, functions, integrals, combinatorics, statistics, simulation, integer sequences, diophantine equations, matrix applications, operators.