File:Ernst schroederFragment.jpg

Ernst Schroeder.

Fragment from image http://mizugadro.mydns.jp/t/index.php/File:Ernst_schroeder.jpg

Portrait of the german logician and mathematician Ernst Schroeder (Ernst Schröder). The photo was taken between 1890 and 1902.

Original filename: https://upload.wikimedia.org/wikipedia/commons/3/34/Ernst_schroeder.jpg