In memory of a producer — Black Trinity.
See also a phrase from an image* in today's earlier post
For Non -Charlatans:
"Let us make a small example. . . ."
* Page 149 of "Groups and Symmetries," by F. Oggier
& A. M. Bruckstein. "These notes were designed to fit
the syllabus of the course 'Groups and Symmetries',
taught at Nanyang Technological University in autumn
2012, and 2013."
