Circle theorems are properties that are true for all circles, regardless of their size. There are six theorems to learn and recognise. Questions can have a combination of theorems. It is important to ...

One of the basic theorems in universal algebra is Birkhoff's variety theorem: the smallest equationally axiomatizable class containing a class K of algebras coincides with the class obtained by taking ...

This is a preview. Log in through your library . Abstract In this paper we present some basic problems of the metric fixed point theory (existence, uniqueness, set-theoretic aspects (Bessaga, Janos, ...