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.
DeMorgan. es Fotografa de Augustus De Morgan publicada en ens fr des maths html Alain Le Mignot The Open Court Publishing other versions PDold Augustus De Morgan Uploaded with
Page 2023 Free-images.com. All images are Public Domain