Orval Lester Sweeney has written:

'Numerical properties of the full transformation semigroup on a finite domain' -- subject(s): Mathematics

Peter M. Higgins has written:

'Techniques of semigroup theory' -- subject(s): Semigroups

transformation

Maurice Sion has written:

'A theory of semigroup valued measures' -- subject(s): Lifting theory, Measure theory, Semigroups, Vector-valued measures

The size of the shape changes with a similarity transformation (enlargement), whereas it does not with a congruence transformation.