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A K-theoretic approach to Chern-Cheeger-Simons invariants

Pekonen, Osmo (1993)

Proceedings of the Winter School "Geometry and Physics"

The aim of this paper is to construct a natural mapping C ˇ k , k = 1 , 2 , 3 , , from the multiplicative K -theory K ( X ) of a differential manifold X , associated to the trivial filtration of the de Rham complex, as defined by M. Karoubi in [C. R. Acad. Sci., Paris, Sér. I 302, 321-324 (1986; Zbl 0593.55004)] to the odd cohomology H s 2 k - 1 ( X ; C * ) . By using this mapping, the author associates to any flat complex vector bundle E on X characteristic classes C ˇ k ( E ) H d R 2 k - 1 ( X ; C * ) analogous to the classes studied by S. Chern, J. Cheeger and J. Simons in [Differential...

A Language Engineering Architecture for Processing Informal Mathematical Discourse

Wolska, Magdalena (2008)

Towards Digital Mathematics Library. Birmingham, United Kingdom, July 27th, 2008

We present a modular architecture for processing informal mathematical language as found in textbooks and mathematical publications. We point at its properties relevant in addressing three aspects of informal mathematical discourse: (i) the interleaved symbolic and natural language, (ii) the linguistic, domain, and notational context, and (iii) the imprecision of the informal language. The objective in the modular approach is to enable parameterisation of the system with respect to the natural language...

A mesh free numerical method for the solution of an inverse heat problem

Azari, Hossein, Parzlivand, F., Zhang, Shuhua (2012)

Applications of Mathematics 2012

We combine the theory of radial basis functions with the finite difference method to solve the inverse heat problem, and use five standard radial basis functions in the method of the collocation. In addition, using the newly proposed numerical procedure, we also discuss some experimental numerical results.

A method to rigorously enclose eigenpairs of complex interval matrices

Castelli, Roberto, Lessard, Jean-Philippe (2013)

Applications of Mathematics 2013

In this paper, a rigorous computational method to enclose eigenpairs of complex interval matrices is proposed. Each eigenpair x = ( λ , ) is found by solving a nonlinear equation of the form f ( x ) = 0 via a contraction argument. The set-up of the method relies on the notion of r a d i i p o l y n o m i a l s , which provide an efficient mean of determining a domain on which the contraction mapping theorem is applicable.

A multilevel correction type of adaptive finite element method for Steklov eigenvalue problems

Lin, Qun, Xie, Hehu (2012)

Applications of Mathematics 2012

Adaptive finite element method based on multilevel correction scheme is proposed to solve Steklov eigenvalue problems. In this method, each adaptive step involves solving associated boundary value problems on the adaptive partitions and small scale eigenvalue problems on the coarsest partitions. Solving eigenvalue problem in the finest partition is not required. Hence the efficiency of solving Steklov eigenvalue problems can be improved to the similar efficiency of the adaptive finite element method...

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