1,503,172 research outputs found

    Ganga Ma

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    Concord, MA

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    Ma

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    Ma

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    https://digitalcommons.library.umaine.edu/mmb-vp/4986/thumbnail.jp

    L² -estimates for the evolving surface finite element method

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    In this paper we consider the evolving surface finite element method for the advection and diffusion of a conserved scalar quantity on a moving surface. In an earlier paper using a suitable variational formulation in time dependent Sobolev space we proposed and analysed a finite element method using surface finite elements on evolving triangulated surfaces. An optimal order H¹ -error bound was proved for linear finite elements. In this work we prove the optimal error bound in L² (Γ(t)) uniformly in time

    Axiomatic differential geometry II-1 - vector fields

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    In our previous paper entitled \Axiomatic di erential geometry I - towards model categories of di erential geometry", we have given a category-theoretic framework of di erential geometry. As the rst part of our series of papers concerned with di erential-geometric developments within the above axiomatic scheme, this paper is devoted to vector elds. The principal result is that the totality of vector elds on a microlinear and Weil exponential object forms a Lie algebra
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