1984/123/2

Extension theorem for a pseudo-arc

A generalization of Shoenfield theorem on ${\displaystyle {\left({\Sigma }^1\right)}_2}$ sets

Continuous relations and generalized ${\displaystyle G_{\delta }}$ sets

Sur le maximum approximatif

On indecomposable subcontinua of surfaces

${\displaystyle L_{\infty {\omega }_1}-e\le mentary\equiv a\le nceof}$ω_1!$!-like models of PA

Exact covering systems for groups

On span and chainable continua