Ian Short: 2 books

Reversibility is a thread woven through many branches of mathematics. It arises in dynamics, in systems that admit a time-reversal symmetry, and in group theory where the reversible group elements are those that are conjugate to their inverses. However, the lack of a lingua franca for discussing reversibility...

There is something fitting about linking the Savoy operas with limericks. Both are likely to appeal to people with a certain type of sense of humour. Why are the Savoy operas funny? Because they were written by a couple of geniuses who knew how to be funny never fall into the trap of assuming that...