Leipzig, B. G. Teubner, 1890. 8vo. Bound in recent full black cloth with gilt lettering to spine. In ""Mathematische Annalen"", Volume 35., 1890. Entire volume offered. Library label pasted on to pasted down front free end-paper. Small library stamp to lower part of title title page and verso of title page. Very fine and clean. Pp. 495-526. [Entire volume: IV, 604 pp.].
First publication of the paper which named the ""Pochhammer contour"". Pochhammer contour is a contour in the complex plane with two points removed, used for contour integration.Camille Jordan published in 1887 a paper introducing the concept. In 1890 Porchhammer expanded his theories in the present paper.