Cantor, Georg. Über die verschiedenen Ansichten in Bezug auf die actualunendlichen Zahlen. Stockholm: P. A. Norstedt & Söner, 1886. 

?First separate edition. 8vo. pp. 10; title-page browned, original rear plain wrapper present, front wrapper lacking with, loosely inserted at rear, Cantor’sprinted letter ‘Über die verschiedenen Standpunkte in Bezug auf die actualunendliche’, 4pp., slightly trimmed, sellotape stain.

Provenance: From the library of Ivor Grattan-Guinness, with his ownership inkstamp to title-page of main work.

Bihang till K. Svenska Vet.-Akad. Handlingar Band II. N:o 19. Cantor’s article provides a statement on the necessity of differentiating between theoretical and actual entities. It is accompanied by Cantor’s 1885 letter, printed in the Zeitschrift für Philosophie und Philosophische Kritik of 1886, to his colleague Gustav Eneström.