Approach your problems from the right It isn't that they can't see the solution end and begin with the answers. Then, It is that they can't see the problem. one day, perhaps. you will find the final G. K. Chesterton. The Scandal of Fa­ question. ther Brown 'The point of a Pin'. 'The Hermit Clad in Crane Feathers' in R. van Gulik's The Chinese Maze Murders. Growing specialization and diversification have brought a host of mon 0 graphs and textbooks on increasingly specialized topics. However, the "tree" of knowledge of mathematics and related fields does not grow only by putting forth new branches. It also happens, quite often in fact. that branches which were thought to be completely disparate are suddenly seen to be related. Further, the kind and level of sophistication of mathematics applied in various sciences has changed drastically in recent years: measure theory is used (non-trivially) in regional and theoretical economics~ algebraic geometry interacts with physics; the Minkowsky lemma.