Results 21 to 30 of about 2,005,958 (244)
Student perspectives on the relationship between a curve and its tangent in the transition from Euclidean Geometry to Analysis [PDF]
, 2008 The tangent line is a central concept in many mathematics and science courses. In this paper we describe a model of students’ thinking – concept images as well as ability in symbolic manipulation – about the tangent line of a curve as it has developed ...
Artigue M. +19 more
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Generalized primal topological spaces
AIMS Mathematics, 2023 In the present article, a new category of mathematical structure is described based on the topological structure "primal" and the notion of "generalized". Such a structure is discussed in detail in terms of topological properties and some basic theories.
H. Al-Saadi, Huda Al-Malki
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Railway car routing optimization based on the coordinated utilization of station‐line capacities
IET Intelligent Transport Systems, 2023 To optimize railway car routing based on balanced station‐line capacities, thereby improving railway freight traffic organization efficiency, and reducing transportation costs, a railway car routing optimization model based on the coordinated utilization
Li Guangye +4 more
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Statistical expansions and locally uniform Fréchet differentiability [PDF]
, 1991 Estimators which have locally uniform expansions are shown in this paper to be asymptotically equivalent to M-estimators. The M-functionals corresponding to these M-estimators are seen to be locally uniformly Fréchet differentiable.
Bednarski, T. +2 more
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ON THE RAINBOW NEIGHBOURHOOD NUMBER OF MYCIELSKI TYPE GRAPHS
International Journal of Apllied Mathematics, 2019 A rainbow neighbourhood of a graph G is the closed neighbourhood N [v] of a vertex v ∈ V (G) which contains at least one colored vertex of each color in the chromatic coloring C of G. Let G be a graph with a chromatic coloring C defined on it. The number
N. Sudev, C. Susanth, S. Kalayathankal
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Results in Physics, 2020 This paper studies the (2 + 1)-dimensional hyperbolic nonlinear Schrödinger equation. The first integral of this equation, the phase portraits and the effective potentials are provided. Two different methods are applied to find exact analytical solutions.
Eric Tala-Tebue +4 more
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Closure, interior and neighbourhood in a category
Hacettepe Journal of Mathematics and Statistics, 2018 The natural correspondences in topology between closure, interior and neighbourhood no longer hold in an abstract categorical setting where subobject lattices are not necessarily Boolean algebras.
D. Holgate, J. Šlapal
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Vopěnkova Alternativní teorie množin v matematickém kánonu 20. století
Filosofický časopis, 2022 Vopěnka’s Alternative Set Theory can be viewed both as an evolution and as a revolution: it is based on his previous experience with nonstandard universes, inspired by Skolem’s construction of a nonstandard model of arithmetic, and its inception has been
Haniková, Zuzana
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Poles of maximal order of motivic zeta functions [PDF]
, 2015 We prove a 1999 conjecture of Veys, which says that the opposite of the log canonical threshold is the only possible pole of maximal order of Denef and Loeser's motivic zeta function associated with a germ of a regular function on a smooth variety over a
Nicaise, Johannes, Xu, Chenyang
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Applying Cech rough closure theory to binary hypercube graphs [PDF]
Mathematics and Computational SciencesThe present study examines hypercube graphs through the lens of Čech rough closure theory (ČRCT). Leveraging the binary representation and inherent symmetry of hypercubes, we introduce a closure-based approach for modelling uncertainty and vagueness in ...
Simson Jackson, Anto Sherine I
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