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.
LL deMorgan. Use TeX begin align perp perp equiv Aotimes perp equiv perp wp perp Aoplus perp equiv perp perp perp equiv perpend align Mathematical formula Linear Logic de Morgan laws tex file Laurent Regnier De Morgan's law
Page 2023 Free-images.com. All images are Public Domain