Sestrojili jsme regulární prostor X s podprostorem, který je v X relativně normální, ale nikoli 2-normální (odpověď na otázku autorů Kawaguchi a Sokei). (cs)
A regular space X having a subspace which is relatively normal but not 2-normal in X is constructed to answer a question asked by Kawaguchi and Sokei.
A regular space X having a subspace which is relatively normal but not 2-normal in X is constructed to answer a question asked by Kawaguchi and Sokei. (en)