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Formulas for the Inverses of Toeplitz Matrices with Polynomially Singular Symbols
Authors:Philippe?Rambour  author-information"  >  author-information__contact u-icon-before"  >  mailto:philippe.rambour@math.u-psud.fr"   title="  philippe.rambour@math.u-psud.fr"   itemprop="  email"   data-track="  click"   data-track-action="  Email author"   data-track-label="  "  >Email author,Abdellatif?Seghier
Affiliation:(1) Université de Paris Sud, Bât. 425, 91405 Orsay Cedex, France
Abstract:We consider large finite Toeplitz matrices with symbols of the form (1– cos theta)p f(theta) where p is a natural number and f is a sufficiently smooth positive function. By employing techniques based on the use of predictor polynomials, we derive exact and asymptotic formulas for the entries of the inverses of these matrices. We show in particular that asymptotically the inverse matrix mimics the Green kernel of a boundary value problem for the differential operator$$( - 1)^p frac{{d^{2p} }}
{{dx^{2p} }}.$$Submitted: June 20, 2003
Keywords:Primary 47B35  Secondary 15A09, 34B27, 47N20, 47N30
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