 The general set up reminds one much of Chevalley’s approach and one would look in vain in de Lorenzo’s book for a satisfactory account of what style is. It is true that there are some interesting observations about the role of language in determining a style but a general philosophical analysis is missing. There is however an important point to be emphasized concerning the treatment given by Chevalley and de Lorenzo, which seems to point to an important feature of the use of ‘style’ in mathematics.