1975/89/2

On the rim-types of hereditarily locally connected continua

Projections of knots

Two notes on abstract model theory. II. Languages for which, the set of valid sentences is semi-invariantly implicitly definable

On some functional equations with a restricted domain

A set-theoretical equivalent of the prime ideal theorem for Boolean algebras

Core structures for theories

Closure-preserving families of finite sets

Proper shape retracts