The present selection of A. Mostowski’s work comprises within one
edition the most important of his papers, written during nearly forty years
of scholarly activity and scattered so far over various publications. We
hope that it will gain the approval of all readers who concern themselves
with the foundations of mathematics.
In selecting the papers, the Editorial Committee aimed at including,
on the one hand, the most important of A. Mostowski’s contributions to
mathematics and, on the other hand. those papers which have preserved
their topical interest and are the most frequently quoted ones.