IMG_4236.jpg

Links
- https://www.mathematics.uni-bonn.de/de/outreach/pictures/for-students-and-teachers/mainz-2025/img_4236.jpg/image_view_fullscreen
- https://www.mathematics.uni-bonn.de/de/outreach/pictures/for-students-and-teachers/mainz-2025/img_4236.jpg/@@download/image/IMG_4236.jpg