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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].

Instead, we show belowthat aω satisfies a G̊arding’s inequality. Then, according to Fredholm’s alternative,uniqueness implies existence of solution. ... Because of Lemma 3.2 we knowthat the problem satisfies Fredholm’s alternative (see for

a number of one-parameter models, we start with the following lemma, which results in thetheory of Fredholm-Volterra integral equations [see Mason and Handscomb(2002), Ch. ... H(u,v) =1. |u v|α(1 v2)(1α)/2.(4.9). It appears in the theory of

It is required only that the operators L(k) = L(x,D k) :H2(T) L2(T) are Fredholm for k Cd.

One reason explaining the spectral gap as above is the fact that LM is an (un-bounded) Fredholm operator in the v variable, of the form.

3) The operator on M is “elliptic” in the sense that beingpushed down to N, it is a Fredholm operator in appropriatespaces. ... An easier statement, without estimates on growth of the functionf, can be obtained from the analytic Fredholm theory (e.g.,

18. J.M. Lee, Fredholm operators and Einstein metrics on conformally compact manifolds,Memoirs AMS, in press, math.DG/0105046.

Generic injectivity and stabilityissues are discussed and some Fredholm alternatives are considered for connections in[MP20MP20, Zho17Zho17].

D. T.-R. McLaughlin, and A. Minakov. Soliton v.the gas: Fredholm determinants, analysis, and the rapid oscillations behind the kineticequation arXiv:2205.02601, 2022.