A famous theorem of Auslander states that a finite dimensional algebra is of finite representation type if and only if every module is additively equivalent to a finite dimensional one. This establishes a correlation between quantity (of indecomposable finite dimensional modules) and size (of indecomposable modules).
We will discuss the ocurrence of an analogous correlation in silting theory. Indeed, for a finite dimensional algebra A we prove that
1) A is \tau-tilting finite if and only if every silting module is additively equivalent to a finite dimensional one.
2) A is silting discrete if and only if every bounded silting complex is additively equivalent to a compact one.
This is based on joint work with L. Angeleri Hügel and F. Marks and on joint work with L. Angeleri Hügel and D. Pauksztello.
