We prove that every orthocomplete homogeneous effect algebra is sharply dominating. Let us denote the greatest sharp element below x by x↓. For every element x of an orthocomple...
We define an extension of forest algebra for -forests. We show how the standard algebraic notions (free object, syntactic algebra, morphisms, etc.) extend to the infinite case. To ...
The emergence of database languages with side effects, notably for XML, raises significant challenges for database compilers and optimizers. In this paper, we extend an algebra fo...
The general-purpose precise interrupt mechanism, which has long been used to handle exceptional conditions that occur infrequently, is now being used increasingly often to handle ...
We give a general method for showing that all numberings of certain effective algebras are recursively equivalent. The method is based on computable approximation-limit pairs. The...
Jens Blanck, Viggo Stoltenberg-Hansen, John V. Tuc...