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2022
It is built from checkable properties of the record itself: whether the article has a DOI, how many independent sources confirmed its data, whether the required fields are filled in, and how recent the latest confirmation is. Disagreement between sources and a missing identifier lower it. A value of 80 or above means the record was published without further checking; 60 to 79 means it is published at reduced confidence, with a manual check advisable. A record verified by an editor by hand is never pushed below 90 by a recalculation. This scores our data about the article, not the article itself.
Abstract The paper gives a correct definition of the formal Laplace operator with delta-shaped perturbation. To define the area of use, the limiting potentials of simple and double layers are used. It is proved that from a set of spectra of some reference operators it is possible to unambiguously reconstruct the boundary densities of the potentials and the double layer. Moreover, one of the reference operators coincides with the original Laplace operator with delta-like perturbation.