Jürgen Appell

Implicit functions, nonlinear integral equations, and the measure of noncompactness of the superposition operator

Jürgen Appell · Journal of Mathematical Analysis and Applications · 1981 · 57 citations

Nonlinear Integral Equations, Resolvent Kernel, Generalized Function +5

New results on newton-kantorovich approximations with applications to nonlinear integral equations

Jürgen Appell, Espedito De Pascale, Julia V. Lysenko et al. · Numerical Functional Analysis and Optimization · 1997 · 56 citations

Numerical Analysis, New Results, Engineering +12

Noncompactness principles in nonlinear operator approximation theory

Jürgen Appell, Maria Patrizia Pera · Pacific Journal of Mathematics · 1984 · 26 citations · Full text

Some spectral theory for nonlinear operators

Jürgen Appell, Michael Dörfner · Nonlinear Analysis · 1997 · 23 citations

Spectral Theory, Linear Operator, Resolvent Kernel +3

Nonlinear integral inclusions of Hammerstein type

Jürgen Appell, Espedito De Pascale, Hôǹg Thái Nguyêñ · Topological Methods in Nonlinear Analysis · 1995 · 22 citations · Full text

Riemann-hilbert Problem, Integrable System, Functional Analysis +2