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Noncompactness principles in nonlinear operator approximation theory (1984)

Appell, Jürgen ; Pera, Maria Patrizia

On analyticity conditions for the superposition operator in ideal function spaces (1985)

Appell, Jürgen ; Zabrejko, Petr Petrovič

On the differentiability of the superposition operator in Hölder and Sobolev spaces (1984)

Appell, Jürgen

Su alcuni parametri connessi con la misura di non compattezza di Hausdorff in spazi di funzioni misurabili (1984)

Appell, Jürgen ; De Pascale, E.

The superposition operator in spaces of measurable and continuous functions (1987)

Appell, Jürgen

Théorèmes de bornage pour l'opérateur de Nemytskij dans les espaces idéaux (1986)

Appell, Jürgen ; de Pascale, Espedito

Über die Differenzierbarkeit des Superpositionsoperators in Orliczräumen (1985)

Appell, Jürgen

Über eine Klasse symmetrischer idealer Funktionenräume nebst Anwendungen (1984)

Appell, Jürgen

Untersuchungen zur Theorie nichtlinearer Operatoren und Operatorgleichungen (1985)

Appell, Jürgen

Analytic superposition operators [Text in Russian] (1985)

Appell, Jürgen ; Petrovič Zabrejko, Petr

An application of B. N. Sadovskij's fixed point principle to nonlinear singular equations (1987)

Appell, Jürgen ; De Pascale, Espedito ; Zabrejko, Petr P.

Estimating the Banach-Mazur distance of some pairs of symmetric spaces (1987)

Appell, Jürgen ; Semenov, Jevgenij M.

G. Darbo's fixed point principle after 30 years (1986)

Appell, Jürgen

Misure di non compattezza in spazi ideali (1987)

Appell, Jürgen

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