Sur l'équation \(\varDelta u = c(x, y) u(x, y)\), \(c > 0\), quand \(c (x, y)\) admet des points singuliers; et une équation de Fredholm correspondante à noyau singulier.
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Publication:573401
DOI10.1007/BF03016784zbMATH Open57.0564.03OpenAlexW1980459494MaRDI QIDQ573401
Publication date: 1931
Published in: Rendiconti del Circolo Matematico di Palermo (Search for Journal in Brave)
Full work available at URL: https://doi.org/10.1007/bf03016784
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