1. 30 As Anne Gray has pointed out, it is difficult to generalise about housekeeping systems.

2. Known also as right-angled Artin groups, these Abelian groups generalise the arithmetic addition of integers.

3. Nevertheless, there is one criterion by which we can generalise the rate of success in production.

4. 12 Eleven years of trapping has demonstrated that it is inadvisable to generalise from two or three years' experience.

5. During this time he helped to generalise the strategy and tactics of the Bolsheviks to newly formed Communist parties across Europe and further afield.