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  Partner: UNT Libraries
 Department: Department of Mathematics
 Language: English
 Collection: UNT Theses and Dissertations
A Development of the Real Number System

A Development of the Real Number System

Date: August 1961
Creator: Matthews, Ronald Louis
Description: The purpose of this paper is to construct the real number system. The foundation upon which the real number system will be constructed will be the system of counting numbers.
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A Development of the Real Number System by Means of Nests of Rational Intervals

A Development of the Real Number System by Means of Nests of Rational Intervals

Date: 1949
Creator: Williams, Mack Lester
Description: The system of rational numbers can be extended to the real number system by several methods. In this paper, we shall extend the rational number system by means of rational nests of intervals, and develop the elementary properties of the real numbers obtained by this extension.
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Differentiable Functions

Differentiable Functions

Date: June 1966
Creator: McCool, Kenneth B.
Description: The primary purpose of this thesis is to carefully develop and prove some of the fundamental, classical theorems of the differential calculus for functions of two real variables.
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Differentiation in Banach Spaces

Differentiation in Banach Spaces

Date: December 1972
Creator: Heath, James Darrell
Description: This thesis investigates the properties and applications of derivatives of functions whose domain and range are Banach spaces.
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Dimension spectrum and graph directed Markov systems.

Dimension spectrum and graph directed Markov systems.

Access: Use of this item is restricted to the UNT Community.
Date: May 2006
Creator: Ghenciu, Eugen Andrei
Description: In this dissertation we study graph directed Markov systems (GDMS) and limit sets associated with these systems. Given a GDMS S, by the Hausdorff dimension spectrum of S we mean the set of all positive real numbers which are the Hausdorff dimension of the limit set generated by a subsystem of S. We say that S has full Hausdorff dimension spectrum (full HD spectrum), if the dimension spectrum is the interval [0, h], where h is the Hausdorff dimension of the limit set of S. We give necessary conditions for a finitely primitive conformal GDMS to have full HD spectrum. A GDMS is said to be regular if the Hausdorff dimension of its limit set is also the zero of the topological pressure function. We show that every number in the Hausdorff dimension spectrum is the Hausdorff dimension of a regular subsystem. In the particular case of a conformal iterated function system we show that the Hausdorff dimension spectrum is compact. We introduce several new systems: the nearest integer GDMS, the Gauss-like continued fraction system, and the Renyi-like continued fraction system. We prove that these systems have full HD spectrum. A special attention is given to the backward continued fraction ...
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Dimensions in Random Constructions.

Dimensions in Random Constructions.

Date: May 2002
Creator: Berlinkov, Artemi
Description: We consider random fractals generated by random recursive constructions, prove zero-one laws concerning their dimensions and find their packing and Minkowski dimensions. Also we investigate the packing measure in corresponding dimension. For a class of random distribution functions we prove that their packing and Hausdorff dimensions coincide.
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Direct Sums of Rings

Direct Sums of Rings

Date: August 1966
Creator: Hughes, Dolin F.
Description: This paper consists of a study of the direct sum U of two rings S and T. Such a direct sum is defined as the set of all ordered pairs (s1, t1), where s1 is an arbitrary element in S and t1 is an arbitrary element in T.
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Divisibility in Abelian Groups

Divisibility in Abelian Groups

Date: August 1966
Creator: Huie, Douglas Lee
Description: This thesis describes properties of Abelian groups, and develops a study of the properties of divisibility in Abelian groups.
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Dually Semimodular Consistent Lattices

Dually Semimodular Consistent Lattices

Date: May 1988
Creator: Gragg, Karen E. (Karen Elizabeth)
Description: A lattice L is said to be dually semimodular if for all elements a and b in L, a ∨ b covers b implies that a covers a ∧ b. L is consistent if for every join-irreducible j and every element x in L, the element x ∨ j is a join-irreducible in the upper interval [x,l]. In this paper, finite dually semimodular consistent lattices are investigated. Examples of these lattices are the lattices of subnormal subgroups of a finite group. In 1954, R. P. Dilworth proved that in a finite modular lattice, the number of elements covering exactly k elements is equal to the number of elements covered by exactly k elements. Here, it is established that if a finite dually semimodular consistent lattice has the same number of join-irreducibles as meet-irreducibles, then it is modular. Hence, a converse of Dilworth's theorem, in the case when k equals 1, is obtained for finite dually semimodular consistent lattices. Several combinatorial results are shown for finite consistent lattices similar to those already established for finite geometric lattices. The reach of an element x in a lattice L is the difference between the rank of x*, the join of x and all ...
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The Dyadic Operator Approach to a Study in Conics, with some Extensions to Higher Dimensions

The Dyadic Operator Approach to a Study in Conics, with some Extensions to Higher Dimensions

Date: 1940
Creator: Shawn, James Loyd
Description: The discovery of a new truth in the older fields of mathematics is a rare event. Here an investigator may hope at best to secure greater elegance in method or notation, or to extend known results by some process of generalization. It is our purpose to make a study of conic sections in the spirit of the above remark, using the symbolism developed by Josiah Williard Gibbs.
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