THIS book is intended to provide the university student in the physical sciences with information about the differential calculus which he is likely to need. The techniques described are presented with due regard for their theoretical basis; but the emphasis is on detailed discussion of the ideas of the differ- ential calculus and on the avoidance of false statements rather than on complete proofs of all results. It is a frequent experi- ence of the university lecturer that science students 'know how to differentiate', but are less confident when asked to say 'what ix means'. It is with the...