A functional characterization of parallelogram spaces
-ideals in the lattice of semi -ideals
Regularity of algebras with applications to congruence class geometry
Boolean concept lattices and good contexts
Mal'cev-type theorems for partial congruences
Solution of the problem of directly decomposable homomorphisms
Varieties having directly decomposable congruence classes
Identities for direct decomposability of congruences can be written in two variables
Announcements of new results
Announcements of new results
Coherence implies congruence-regularity (a local version)
Coherence in varieties of algebras
Mal'cev conditions for directly decomposable compatible relations
Congruences generated by filters
Mal'cev conditions for congruence-regular and congruence-permutable varieties
Varieties of subregular algebras are definable by a Mal'cev condition
Relation products of congruences and factor congruences
Arithmeticity at 0
Conditions for factorable relations
Tolerances on powers of a finite algebra
It is shown that any power , of a finite -element algebra , has factorable tolerances whenever the power has the same property.
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