On the calculus of relations
On the calculus of relations is a scholarly work by Alfred Tarski, published in 1941 in ''Journal of Symbolic Logic''. The main subjects of the publication include philosophy, epistemology, witness, subject, history of mathematics, simple, and calculus. Although some scattered remarks regarding the concept of relations are to be found already in the writings of medieval logicians, it is only within the last hundred years that this topic has become the subject of systematic investigation.