Completion and closure
Completions in biaffine sets.
Composing special epimorphisms and retractions
Composites of effective descent maps
Construction of Cartesian closed topological hulls
Décompositions et Lax-complétions
Derivations of crossed modules.
Descent in categories of (co)algebras.
Diagonalisierungspaare. I.
Diagonalisierungspaare. II.
Disjointness and related properties of coproducts
EDZ-varieties: The Schreier property and epimorphisms onto
Epics in the category of k-groups need not have dense range
Epimorphic Extensions of Non-Commutative Rings
Epimorphisms and semilattices of semigroups.
Epimorphisms of regular rings
Every topological category is convenient for Gelfand Duality.
Existence theorems for commutative diagrams.
Extremal subobjects of complete posets
Factorization systems and adjunctions.