Month: June 2014

This beautiful proof of the ancient theorem of Pythagoras is attributed to Leonardo de Vinci. There should be no need for words of explanation, but I have added them all the same.

Rules of Indices provide an excellent first look at a developing mathematical structure. You start with a definition which provides a nice rule. You then generalise, trying to preserve the rule. What you get is a marvellous structure which is all a consequence of the first definition.