On the equality of the radius and the span of the set with repsect to the generating function $| z-zeta | /[u(z)u(zeta )]$

Tytuł:
On the equality of the radius and the span of the set with repsect to the generating function $| z-zeta | /[u(z)u(zeta )]$
Opis:
(POLISH) ZESZYTY NAUK. UNIW. JAGIELLO. PRACE MAT. no. 5 1959 35--45