Results 21 to 30 of about 96,341 (238)
Scientific Reports, 2021 We address the use of Euler's theorem and topological algorithms to design 18 polyhedral hydrocarbons of general formula CnHn that exist up to 28 vertexes containing four- and six-membered rings only; compounds we call “nuggets”.
Camila M. B. Machado +3 more
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Model of formation of porosity of sponge titanium briquettes at the sintering stage
Авіаційно-космічна техніка та технологія, 2023 This article examines the peculiarities of the formation of interparticle connections in porous products based on titanium powders using sponge titanium as an example, which are used in the aviation industry and airfield management.
Leonid Klymenko +4 more
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Revista de Educación Matemática, 2021 Dado un triangulo cualquiera siempre podemos determinar dos circunferencias relacionadas con él: la circunecripta y la inscripta. La fórmula de Euler nos da la relación que existe entre los radios de dichas circunferencias. A fin de obtener esta propiedad, pasemos a enunciar los elementos y propiedades que necesitaremos, seguramente bien conocidos.
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Experiments and Computational Fluid Dynamics on Vapor and Gas Cavitation for Oil Hydraulics
Chemical Engineering &Technology, Volume 46, Issue 1, Page 147-157, January 2023., 2023 A computational fluid dynamics cavitation model for vapor and gas cavitation in hydraulic oil is presented, parameterized, and validated. For numerous operating points, cavitation in a realistic valve geometry is visualized using shadowgraphs and high‐speed cameras. Vapor and gas cavitation are experimentally separated by complete degassing of the oil.
Sven Osterland +2 more
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Which point sets admit a $k$-angulation?
Journal of Computational Geometry, 2014 For \(k\ge 3\), a \(k\)-angulation is a 2-connected plane graph in which every internal face is a \(k\)-gon. We say that a point set \(P\) admits a plane graph \(G\) if there is a straight-line drawing of \(G\) that maps \(V(G)\) onto \(P\) and has the ...
Michael S. Payne +2 more
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Euler?s Exponential Formula for Semigroups [PDF]
Semigroup Forum, 2004 The aim of this paper is to show that Euler’s exponential formula $\lim_{n\rightarrow\infty}\linebreak[4] (I-tA/n)^{-n}x = e^{tA}x$, well known for $C_0$ semigroups in a Banach space $X\ni x$, can be used for semigroups not of class $C_0$, the sense of the convergence being related to the regularity of the semigroup for $t>0$.
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Sketching and Stacking With Random Fork Based Exact Signal Recovery Under Sample Corruption
IEEE Access, 2020 In this paper, we propose a new technique for exact recovery of missing data due to impulsive noise in time-domain sampled acoustic waves, named as sketching and stacking with random fork (SSRF).
Joo Hyun Park +3 more
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Upper bounds on the bondage number of a graph
Electronic Journal of Graph Theory and Applications, 2018 The bondage number b(G) of a graph G is the smallest number of edges whose removal from G results in a graph with larger domination number. We obtain sufficient conditions for the validity of the inequality b(G) ≤ 2s − 2, provided G has degree s vertices.
Vladimir Dimitrov Samodivkin
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Degree formula for the Euler characteristic [PDF]
Proceedings of the American Mathematical Society, 2012 We give a proof of the degree formula for the Euler characteristic previously obtained by Kirill Zainoulline. The arguments used here are considerably simpler and allow us to remove all restrictions on the characteristic of the base field.
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General Euler-Boole's and dual Euler-Boole's formulae [PDF]
Mathematical Inequalities & Applications, 2005 The aim of this talk is to give general Euler-Boole's and dual Euler-Boole's formulae. More precisely, we derive formulae of Boole type where the integral is approximated not only with the values of the function in certain points but also with values of its derivatives up to (2n-1)-th order in end points of the interval. Our method produces formulae of
Iva Franjić +2 more
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