324 citations · 1.7k across the 753 of their papers we have counts for
29 papers · 1 filter
Generalized E-Algebras via lambda-Calculus I
Rüdiger Göbel, Saharon Shelah
An R-algebra A is called E(R)-algebra if the canonical homomorphism from A to the endomorphism algebra End_RA of the R-module {}_R A, taking any a in A to the right multiplication…
Karp height of models of stable theories
Michael C. Laskowski, Saharon Shelah
A trichotomy theorem for countable, stable, unsuperstable theories is offered. We develop the notion of a `regular ideal' of formulas and study types that are minimal with respect…
Absolutely Indecomposable Modules
Rüdiger Göbel, Saharon Shelah
A module is called absolutely indecomposable if it is directly indecomposable in every generic extension of the universe. We want to show the existence of large abelian groups that…
More on Tie-points and homeomorphism in N^*
Alan Dow, Saharon Shelah
A point x is a (bow) tie-point of a space X if X setminus {x} can be partitioned into (relatively) clopen sets each with x in its closure. Tie-points have appeared in the construct…
Tie-points and fixed-points in N^*
Alan Dow, Saharon Shelah
A point x is a (bow) tie-point of a space X if X setminus {x} can be partitioned into (relatively) clopen sets each with x in its closure. Tie-points have appeared in the construct…
Basic Subgroups and Freeness, A Counterexample
Andreas Blass, Saharon Shelah
We construct a non-free but aleph_1-separable, torsion-free abelian group G with a pure free subgroup B such that all subgroups of G disjoint from B are free and such that G/B is d…