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Mathematics: Recent submissions

Now showing items 341-360 of 462

    • A TB Space Which is Not Katetov TB 

      Fleissner, William G. (Rocky Mountain Mathematics Consortium, 1980-06-01)

    • If all Normal Moore Spaces are Metrizable, then there is an Inner Model with a Measurable Cardinal 

      Fleissner, William G. (American Mathematical Society, 1982-09-01)

    • Left Separated Spaces with Point-Countable Bases 

      Fleissner, William G. (American Mathematical Society, 1986-04-01)

    • Stone-Cech remainder which make continuous images normal 

      Fleissner, William G.; Levy, Ronnie (American Mathematical Society, 1989-07-01)

    • On the calculation of mutual information 

      Duncan, Tyrone E. (Society for Industrial and Applied Mathematics, 1970-07-01)

    • Adaptive boundary and point control of linear stochastic distributed parameter systems 

      Duncan, Tyrone E.; Maslowski, Bozenna J.; Pasik-Duncan, Bozenna (Society for Industrial and Applied Mathematics, 1994-05-01)
      An adaptive control problem for the boundary or the point control of a linear stochastic distributed parameter system is formulated and solved in this paper. The distributed parameter system is modeled by an evolution ...

    • Ergodic boundary/point control of stochastic semilinear systems 

      Duncan, Tyrone E.; Maslowski, Bozenna J.; Pasik-Duncan, Bozenna (Society for Industrial and Applied Mathematics, 1998-05-01)
      A controlled Markov process in a Hilbert space and an ergodic cost functional are given for a control problem that is solved where the process is a solution of a parameter-dependent semilinear stochastic differential ...

    • Discretized maximum likelihood estimates for adaptive control of ergodic Markov models 

      Duncan, Tyrone E.; Pasik-Duncan, Bozenna; Stettner, L. (Society for Industrial and Applied Mathematics, 1998-03-01)
      Three distinct controlled ergodic Markov models are considered here. The models are a discrete time controlled Markov process with complete observations, a controlled diffusion process with complete observations, and a ...

    • Remarks on Souslin Properties and Tree Topologies 

      Fleissner, William G. (American Mathematical Society, 1980-10-01)
      We investigate the relation of Souslin (antichain) properties of trees and tree topologies. One result extends a result of Devlin and Shelah by proving, within ZFC, the equivalence of four properties for <o,-trees-collectionwise ...

    • Ordered Spaces all of whose Continuous Images are Normal 

      Fleissner, William G.; Levy, Ronnie (American Mathematical Society, 1989-01-01)
      Some spaces, such as compact Hausdorff spaces, have the property that every regular continuous image is normal. In this paper, we look at such spaces. In particular, it is shown that if a normal space has finite ...

    • On Q-sets 

      Fleissner, William G.; Miller, Arnold W. (American Mathematical Society, 1980-02-01)
      A Q set is an uncountable set X of the real line such that every subset of X is an F„ relative to X. It is known that die existence of a Q set is independent of and consistent with the usual axioms of set theory. We show ...

    • Normal Moore Spaces in the Constructible Universe 

      Fleissner, William G. (American Mathematical Society, 1974-11-01)
      Assuming the axiom of constructibility, points in closed discrete subspaces of certain normal spaces can be simultaneously separated.This is a partial result towards the normal Moore space conjecture.

    • Martin's Axiom Implies that de Caux's Space is Countably Metacompact 

      Fleissner, William G. (American Mathematical Society, 1980-11-01)
      De Caux defined a space 5(E) and, assuming *, showed that S(t) is normal but not countably metacompact. We assume MA„ and show that 5(E) is countably metacompact.

    • Lemma on Measurable Cardinals 

      Fleissner, William G. (American Mathematical Society, 1975-06-01)
      An ordinal is moved by only finitely many measurable cardinals.

    • Discrete Sets of Singular Cardinality 

      Fleissner, William G. (American Mathematical Society, 1983-08-02)
      Let « be a singular cardinal. In Fleissner's thesis, he showed that in normal spaces X, certain discrete sets Y of cardinality a (called here sparse) which are < ic-separated are, in fact, separated. In Watson's thesis, ...

    • Cofinality in normal, almost compact spaces 

      Fleissner, William G.; Kulesza, J.; Levy, R. (American Mathematical Society, 1991-10-01)
      A regular space is said to be a NAC space if, given any pair of disjoint closed subsets, one of them is compact. The standard example of a noncompact NAC space is an ordinal space of uncountable cofinality. The coñnality ...

    • Normal Subspaces of Products of Ordinals 

      Fleissner, William G. (American Mathematical Society, 2002-12-01)
      Let X be a subspace of the product of nitely many ordinals. If X is normal, then X is strongly zero-dimensional, collectionwise normal, and shrinking. The proof uses ( 1; : : : ; n)-stationary sets.

    • Metacompact Subspaces of Products or Ordinals 

      Fleissner, William G. (American Mathematical Society, 2001-05-01)
      Let X be a subspace of the product of nitely many ordinals. X is countably metacompact, and X is metacompact i X has no closed subset homeomorphic to a stationary subset of a regular uncountable cardinal. A theorem ...

    • Son of George and V = L 

      Fleissner, William G. (Association for Symbolic Logic, 1983-03-01)
      This paper has three parts. In this first part, we formulate and prove from V = L a new combinatorial principle, ⋄++. In the second part, we discuss the topological problem which led to the formulation of ⋄++. Finally, we ...

    • NORMALITY VERSUS COUNTABLE PARACOMPACTNESS IN PERFECT SPACES 

      Wage, M. L.; Fleissner, William G.; Reed, G. M. (American Mathematical Society, 1976-07-01)