Thesis (Ph. D.)--University of Oregon, 2002. / Typescript. Includes vita and abstract. Includes bibliographical references (leaves 57-58). Also available for download via the World Wide Web; free to University of Oregon users. Address: http://wwwlib.umi.com/cr/uoregon/fullcit?p3055703.

Thesis (Ph. D.)--University of Wisconsin--Madison, 1982. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 141-142).

Thesis (Ph. D.)--University of Wisconsin--Madison, 1984. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaf 52).

Thesis (Ph. D.)--University of Wisconsin--Madison, 1970. / Vita. Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

Proefschrift--Amsterdam, 1931.

Thesis (Ph. D.)--School of Mathematics and Statistics, Faculty of Science, University of Sydney, 2007. / Title from title screen (viewed 13 January 2009). Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the School of Mathematics and Statistics, Faculty of Science. Includes bibliographical references. Also available in print form.

O objetivo principal desta tese e a construção do semigrupo inverso das classes de isomorfismo das extensões abelianas parciais de um anel comutativo. / The main purpose of this thesis is the construction of the inverse semigroup of the isomorphism classes of the partial abelian extensions of a commutative ring.

O objetivo deste trabalho é mostrar que o conjunto de todas G-super palavras monótonas restritas escritas com super letras duras forma uma base para a álgebra de Hopf H, onde H é gerada por um conjunto skew-primitivo semi-invariante {a1, ..., an} e um grupo abeliano G de todos elementos grouplike. / The objective of this work is to show that the set of all monotonic restricted G-super-words written with hard super-letters form a basis for the Hopf algebra H, where H is generated by a skew-primitive semi-invariant set {a1, ..., an} and an abelian group G of all group-like elements.

O objetivo principal desta tese e a construção do semigrupo inverso das classes de isomorfismo das extensões abelianas parciais de um anel comutativo. / The main purpose of this thesis is the construction of the inverse semigroup of the isomorphism classes of the partial abelian extensions of a commutative ring.

O objetivo deste trabalho é mostrar que o conjunto de todas G-super palavras monótonas restritas escritas com super letras duras forma uma base para a álgebra de Hopf H, onde H é gerada por um conjunto skew-primitivo semi-invariante {a1, ..., an} e um grupo abeliano G de todos elementos grouplike. / The objective of this work is to show that the set of all monotonic restricted G-super-words written with hard super-letters form a basis for the Hopf algebra H, where H is generated by a skew-primitive semi-invariant set {a1, ..., an} and an abelian group G of all group-like elements.