This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Franz Mertens. en Franz Mertens March March was German mathematician mcs stand ac uk html author PDold DEFAULTSORT Mertens Franz Uploaded with Mathematicians from Germany
Page 2023 Free-images.com. All images are Public Domain