On the existence of an eigenfunction of the Hartree operator of the helium atom by the fixed point principle

zbMath0753.47036MaRDI QIDQ1178962

S. Singh

Publication date: 26 June 1992

Published in: Indian Journal of Pure \& Applied Mathematics (Search for Journal in Brave)

zbMATH Keywords

eigenfunctioncontractive mapKrasnosel'skij's fixed point theoremcompletely continuous mapHartreee operator for helium

Mathematics Subject Classification ID

Equations involving nonlinear operators (general) (47J05) Fixed-point theorems (47H10) Nonlinear spectral theory, nonlinear eigenvalue problems (47J10)

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