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Therefore, our existence proof mainly relies on a simple fixed point iterationand standard Fredholm theory. ... ut. The Fredholm alternative in Proposition 3.3 then gives the main theorem of thepaper.

MSC: 35J05, 78A40. Keywords: Helmholtz equation, wave-guide, periodic media,Fredholm alternative. 1 Introduction. ... Our result has therefore verymuch the character of a Fredholm alternative: If solutions are unique, then theyexist for arbitrary f.

JR,Jρ. )given by (6.1). Let σ be a (signed). finite measure supported on R+ such that the Fredholm integral equation. ... Thus we arrive at the Fredholm integral equation. y Ky = ψ, (7.17).

dress an important and challenging set of problems: computation of Fredholm and Volterra. ... been already noted in the computation of spectra of Fredholm operators. •

Meury 3. Fredholm alternative. To this end, most authors have studied the integral operators intrinsicallyon Γ. ... Fredholm alternative on either smooth or non-smooth domainsand prevents us from establishing existence and uniqueness of solutions and

18] formula of Fredholm type:. u(x,t) =22x ln det [1N G(x,t)] , where. ... 21], where, however, the author ends up with a different determinantal formula (not a Fredholm determi-.

dµ(w). In order to manipulate the regularized Fredholm determinant we approximate the right handside by.

STABILITY OF THE PERIODIC TODA LATTICE. UNDER SHORT RANGE PERTURBATIONS. SPYRIDON KAMVISSIS AND GERALD TESCHL. Abstract. We consider the stability of the periodic Toda lat-tice (and slightly more generally of the algebro-geometric finite-gap lattice)

Key Words: inverse gravimetric problem, gravimetry, non–uniqueness, nullspace, ill–posed, regularisation, Newton potential, minimal norm, harmonicdensity, Fredholm integral equation, scaling function, wavelet, multiresolu-tion analysis.

Since there is no small parameter. in the equation, its solution is based on the Fredholm theory [9].