Remark on one-sided -ideals of semigroups
Hajnal Andréka, István Németi, Robert Šulka (1983)
Mathematica Slovaca
Zdeněk Hedrlín (1963)
Commentationes Mathematicae Universitatis Carolinae
Robert Šulka (1979)
Mathematica Slovaca
Marc Berger, Alexander Felzenbaum, Aviezri Fraenkel (1987)
Fundamenta Mathematicae
T. Tamura (1972)
Semigroup forum
A.H. Clifford (1978)
Semigroup forum
Ernest Plonka (1979)
Mathematische Annalen
Denis Higgs (1989)
Cahiers de Topologie et Géométrie Différentielle Catégoriques
Jan Śliwa (1982)
Colloquium Mathematicae
Eng Tjioe Tan (1988)
Manuscripta mathematica
J. Michalski (1988)
Beiträge zur Algebra und Geometrie = Contributions to algebra and geometry
T. Saitô, K. Kajitori, K. Aoki (1996)
Semigroup forum
Gerd Müller (1988)
Aequationes mathematicae
H.L. Chow (1976)
Monatshefte für Mathematik
Karl Strambach, Adriano Barlotti (1985)
Aequationes mathematicae
Daniel Bertrand (2002)
Banach Center Publications
The intrinsic differential Galois group is a twisted form of the standard differential Galois group, defined over the base differential field. We exhibit several constraints for the inverse problem of differential Galois theory to have a solution in this intrinsic setting, and show by explicit computations that they are sufficient in a (very) special situation.
Balogh, Zsolt, Juhász, Tibor (2007)
Annales Mathematicae et Informaticae
Temple H. Fay (1994)
Cahiers de Topologie et Géométrie Différentielle Catégoriques
J. Konieczny (1993)
Semigroup forum
Karel Drbohlav (1981)
Acta Universitatis Carolinae. Mathematica et Physica