1983/118/1

Approximating homotopy equivalences of surfaces by homeomorphisms

Perfect set theorems for ${\displaystyle {\Pi }^1\_2}$ in the universe without choice

Periodic homeomorphisms on ${\displaystyle S^3}$ and cubes with torus knotted holes

On the triangulation of smooth fibre bundles

Algebraic theories and varieties of functor algebras

On approximate n-connectedness