Distances from truncated matrices

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Given an infinite size QT matrix $A$, its finite truncation may (or may not) well approximate the spectrum of the infinite-dimensional operator.

The function distance computes the distance between the eigenvalues of the truncated matrix and the closest eigenvalue of the infinite-dimensional operator.

Contents

Syntax

[D, x] = distances(A, x, N0, nsamp, advpx, dig)

Example

See the documentation on computing eigenvalues for further details on the use of this function.