# Wydawnictwa / Czasopisma IMPAN / Annales Polonici Mathematici / Wszystkie zeszyty

## On functions satisfying more than one equation of Schiffer type

### Tom 58 / 1993

Annales Polonici Mathematici 58 (1993), 237-252 DOI: 10.4064/ap-58-3-237-252

#### Streszczenie

The paper concerns properties of holomorphic functions satisfying more than one equation of Schiffer type ($D_n$-equation). Such equations are satisfied, in particular, by functions that are extremal (in various classes of univalent functions) with respect to functionals depending on a finite number of coefficients.

• J. Macura