Now showing items 1-10 of 22
On chain domains, prime rings and torsion preradicals.
Abstract available in pdf file.
Conformally invariant relativistic solutions.
The study of exact solutions to the Einstein and Einstein-Maxwell field equations, by imposing a symmetry requirement on the manifold, has been the subject of much recent research. In this thesis we consider specifically ...
Queueing and communication networks governed by generalised Lindley-Loynes equations.
Several decades after A.K. Erlang originated the theory of queues and queueing networks, D.V. Lindley added impetus to the development of this field by determining a recursive relation for waiting times. Part I of this ...
On the status of the geodesic law in general relativity.
The geodesic law for test particles is one of the fundamental principles of general relativity and is extensively used. It is thought to be a consequence of the field laws but no rigorous proof exists. This thesis is ...
An algebraic study of residuated ordered monoids and logics without exchange and contraction.
Please refer to the thesis for the abstract.
Aspects of spherically symmetric cosmological models.
In this thesis we consider spherically symmetric cosmological models when the shear is nonzero and also cases when the shear is vanishing. We investigate the role of the Emden-Fowler equation which governs the behaviour ...
Modelling the spatial dynamics of a semi-arid grazing system.
A large proportion of the world's land surface is covered by semi-arid grasslands, and they provide an important source of income as a grazing resource. A more comprehensive understanding of these complex ecosystems is ...
Closure operators on complete lattices with application to compactness.
No abstract available.
A modelling approach for determining the freshwater requirements of estuarine macrophytes.
Increased abstraction of water in the catchment results in a reduced or altered pattern of river flow and this holds serious consequences for the downstream estuarine ecosystem. In South Africa this is a serious concern ...
Aspects of distance and domination in graphs.
The first half of this thesis deals with an aspect of domination; more specifically, we investigate the vertex integrity of n-distance-domination in a graph, i.e., the extent to which n-distance-domination ...