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Browsing by Author "Imchit Termwuttipong"

Browsing by Author "Imchit Termwuttipong"

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  • Analysis of rotative mappings on R 
    Tammatada Khemaratchatakumthorn (Chulalongkorn University, 2014)
    In this work, we prove a fixed point theorem of rotative mappings on the set of real numbers and determine the fixed point sets of these mappings. Also, the rotativeness of mappings in some classical classes in fixed point ...
  • Fixed point theorem of half-continuous multivalued mappings 
    Thanatkrit Kaewtem (Chulalongkorn University, 2009)
    Let E be a topological vector space over R and let C be a nonempty subset of E. A mapping F from C into the set of nonempty subsets of E, is said to be half-continuous if for each x ∈ C with x ∉ F(x) there exists a (nonzero) ...
  • Fixed points of generalized contractive-type mappings on cone metric spaces 
    Ali Sassanapitax (Chulalongkorn University, 2011)
    Theorems that guarantee the existence and the uniqueness of fixed points of generalized contractive mappings on cone metric spaces are given. A characterization of the completeness of cone metric spaces by the existence ...
  • Henstock-Stieltjes integral for Lp-valued functions 
    Nopporn Thamrongrat (Chulalongkorn University, 2010)
    In this thesis, we develop a Henstock-Stieltjes integral for Lp-valued functions and its theory. This work is based on the idea of Henstock integration introduced by J.Kurzweil and R.Henstock.
  • Henstock-Stieltjes integrals of L₂-valued functions 
    Piyaporn Juhung (Chulalongkorn University, 2007)
    The Henstock-Stieltjes integration for functions whose values are in L[subscript 2]-space is defined and its properties are investigated. The work is based on the idea of Henstock integration introduced by J.Kurzweil and ...
  • Limit distribution for sums of the reciprocal of a positive power of independent random variables 
    Imchit Termwuttipong (Chulalongkorn University, 1987)
    Let X₁, X₂,…. be a sequence of independent random variables of fn the probability density function of Xn for n = 1,2, ….. In a paper entitled “Limit distributions for sums of reciprocals of independent random variable” ...
  • On metric-preserving functions 
    Phikul Oudkam (Chulalongkorn University, 2001)
    A function f:[0,infinity)->[0,infinity) is said to be metric-preserving if for every metric space (X,d), fod is a metric on X and a metric-preserving function f is said to be strongly metric-preserving if fod is topologically ...
  • On the approximation of fixed points of nonexpansive mappings 
    Yaowaluk Saesor (Chulalongkorn University, 2001)
    Let B be a Banach space whose norm is uniformly Gateaux differentiable and T a nonexpansive mapping on a closed convex set C of B into itself with the fixed point property. Define a sequence (Xn) in C recursively by Xn+1 ...
  • Rollle's theorem for functions having values in a Banach space 
    Sermsri Sukarin (Chulalongkorn University, 1998)
    In this research, we develop a version of Rolle’s theorem for function ƒ from a subset A of R" into a Banach space B, and its consequences, and develop a theorem which is a generalization of the Mean Value theorem.
  • Some properties of convergence sets 
    Pharunyon Chanthorn (Chulalongkorn University, 2006)
    We investigate some topological and geometric properties of convergence sets on metric spaces. We prove that, for a certain kind of virtually nonexpansive maps, their convergence sets are star-convex and their fixed point ...
  • Some sufficient conditions for cyclic trajectories in a two-dimensional analog of the 3x+1 problem 
    Umarin Pintoptang (Chulalongkorn University, 2001)
    The 3x+1 problem concerns the behavior of the iterates of the function defined by T(x) = (3x+1)/2 if x is odd, T(x) = x/2 if x is even. The 3x+1 Conjecture asserts that, starting from any positive integer alpha , repeated ...
  • W-distances on a metric space 
    Tammatada Khemaratchatakumthorn (Chulalongkorn University, 2006)
    In this thesis, we investigate properties of w-distances on metric spaces. We give a relationship among w-distances, metrics, metric-preserving functions, and topological properties. We introduce the notion of Cauchy ...