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.
Guidograndi. Guido Grandi Italian mathematician Tratta da adm unipi it jsp entity Grandi Guido Original uploader was Deep also it at org it PDOLD PDold original upload log page it Guidograndi Deep also it bytes no da adm unipi it jsp entity Grandi Guido Luigi Guido Grandi
Page 2023 Free-images.com. All images are Public Domain