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• W2105812912 abstract "SUMMARY We investigate approximations to eigenfunctions of a certain class of elliptic operators in R d by finite sums of products of functions with separated variables and especially conditions providing an exponential decrease of the error with respect to the number of terms. The consistent use of tensor formats can be regarded as a base for a new class of rank‐truncated iterative eigensolvers. The computational cost is almost linear in the univariate problem size n , while traditional method scale like n d . Tensor methods can be applied to solving large‐scale spectral problems in computational quantum chemistry, for example, the Schrödinger, Hartree–Fock and Kohn–Sham equations in electronic structure calculations. The results of numerical experiments clearly indicate the linear‐logarithmic scaling of the low‐rank tensor method in n . The algorithms work equally well for the computation of both minimal and maximal eigenvalues of the discrete elliptic operators. Copyright © 2011 John Wiley & Sons, Ltd." @default.
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• W2105812912 date "2011-10-18" @default.
• W2105812912 modified "2023-10-05" @default.
• W2105812912 title "Use of tensor formats in elliptic eigenvalue problems" @default.
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• W2105812912 doi "https://doi.org/10.1002/nla.793" @default.
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