Results 41 to 50 of about 914 (176)
Iterating conditionals and symmetric Stone algebras
Discrete Mathematics, 1996 The authors study notions of iterated conditionals and the problem of a ``right'' definition of the iterated conditional event algebras. From the introduction: ``Various authors proposed an iteration of conditional events. There is not a consensus among them, and the mathematical structures of the resulting entities have not been detailed.
Mai Gehrke, Elbert A. Walker
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The Chemical Record, EarlyView.This publication describes how R. B. Woodward and Roald Hoffmann crafted their masterpiece publications. Illustrations include Woodward's first draft of the famous “Violations There are none. Nor can violations be expected of so fundamental a principle of maximum bonding.” Original but discarded text shows the stepwise paths toward the W‐H masterpieces.
Jeffrey I. Seeman
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Origin and application of the Lorentz factor in X‐ray diffraction
Acta Crystallographica Section A, EarlyView.This review treats the role of the Lorentz factor in quantitative analysis of X‐ray diffraction data. The origin of the Lorentz factor, its derivation and practical implementations for a variety of modern X‐ray diffraction methods are discussed.The Lorentz factor is a fundamental correction factor in quantitative analysis of X‐ray diffraction ...
Fabian Gasser +5 more
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Methods in Ecology and Evolution, EarlyView.Abstract Macroevolutionary adaptation of a continuous trait to different discrete states across species can be modelled using a phylogenetic state‐dependent Ornstein–Uhlenbeck (OU) process. Existing inference methods face two challenges. First, although efficient likelihood algorithms for continuous trait evolution models exist, none have been ...
Priscilla Lau +4 more
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Unitary equivalence in generalized uncertainty principle theories
Nuclear Physics BWe analyze the issue of unitary equivalence within Generalized Uncertainty Principle (GUP) theories in the one-dimensional case. For a deformed Heisenberg algebra, its representation in terms of Hilbert space and conjugate operators is not uniquely ...
Sebastiano Segreto, Matteo Bruno
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Why did Putin invade Ukraine? A theory of degenerate autocracy
American Journal of Political Science, EarlyView.Abstract Many dictatorships end up with a series of disastrous decisions such as Hitler's attack on the Soviet Union or Saddam Hussein's aggression against Kuwait. Even if a certain policy choice is not ultimately fatal for the regime, such as Mao's Big Leap Forward or the Pol Pot's collectivization drive, they typically involve both a miscalculation ...
Georgy Egorov, Konstantin Sonin
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Banach–Stone theorems and Riesz algebras
Journal of Mathematical Analysis and Applications, 2006 Let \(X, Y\) be compact Hausdorff spaces and let \(E, F\) be both Banach lattices and Riesz algebras. In this paper, the following main result shall be proved: If \(F\) has no zero-divisor and there exists a Riesz algebraic isomorphism \(\Phi:C(X,E)\to C(Y,F)\) such that \(\Phi(f)\) has no zero if \(f\) has none, then \(X\) is homeomorphic to \(Y\) and
Miao, Xinhe, Cao, Jiling, Xiong, Hongyun
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Archaeometry, EarlyView.ABSTRACT Riverine and valley systems across the globe have been central to the development of past urban centres. By AD 900, the Shashe and Limpopo Rivers seem to have facilitated the interaction and integration of early farming communities in southern Africa. This paper focuses on the application of geoarchaeological perspectives made available by the
B. S. Nxumalo
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A new categorical equivalence for stone algebras
Mathematica SlovacaAbstract The aim of this paper is to give a categorical equivalence for Stone algebras. We introduce the variety of Stone-Kleene algebras with intuitionistic negation, or Stone KAN-algebras for short, and explore Kalman’s construction for Stone algebras.
Calomino, Ismael +1 more
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Class Angular Distortion Index for Dimensionality Reduction
Computer Graphics Forum, EarlyView.Abstract Dimensionality reduction (DR) techniques are often characterized by whether they preserve global, high‐level structures in the data or local, neighborhood structures. This distinction matters in visualization: global methods can obscure clusters while local methods can over‐emphasize them.
Kaviru Gunaratne +2 more
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