Decomposition spaces and separation properties

<p>This thesis deals primarily with decomposition spaces and the question of inheritance by a decomposition space of certain topological properties. Some new topological concepts which are introduced are of independent interest but they are explored here principally for their implications in decomposition spaces.</p> <p>In Chapter II we compare McAuley's definition of an upper semicontinuous decomposition with other separation properties of the decomposition space and relations of these properties to the projection map. In contrast to Whyburn's (originally, Moore's) definition of upper semicontinuity, which is equivalent to requiring the projection map to be closed, these are purely topological properties, but some nevertheless impose conditions on quotient maps onto spaces satisfying them. Also, they are investigated in conjunction with various basis restrictions on the decomposition space (such as first countability, etc.) or conditions on the nature of the individual elements of the decomposition.</p> <p>Chapter III is more narrow in scope, dealing specifically with certain shrinkability theorems of McAuley, originally asserted for decompositions which are upper semicontinuous in the sense he defined. The observation that this definition of upper semicontinuity did not yield the desired properties as supposed led to the investigations of Chapter II. Proofs of the theorems with the amended hypotheses are supplied.</p>

Name thesis:degree_name

Doctor of Philosophy (PhD)

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Mathematical Sciences

Year

1971

Author dc:creator

• Reed, Myra Jean

Contributors dc:contributor

• Louis F. McAuley
• Dick Wick Hall
• Hudson V. Kronk

• Topology
• Decomposition spaces
• Separation properties

Repository record dc:identifier

https://orb.binghamton.edu/dissertation_and_theses/169

OAI identifier oai:identifier

oai:orb.binghamton.edu:dissertation_and_theses-1175