Ullman is one of the authors of 'Foundations of Computer Science' [1], a well-respected (but out-of-print) introduction to CS theory. I suspect he's borrowing

Ullman is one of the authors of 'Foundations of Computer Science' [1], a well-respected (but out-of-print) introduction to CS theory. I suspect he's borrowing both the intent and the name. [1] http://infolab.stanford.edu/~ullman/focs.html http://infolab.stanford.edu/~ullman/focs.html