Wang's B machines are efficiently universal, as is Hasenjaeger's small universal electromechanical toy

Turlough Neary, Damien Woods, Niall Murphy, Rainer Glaschick. Wang's B machines are efficiently universal, as is Hasenjaeger's small universal electromechanical toy. J. Complexity, 30(5):634-646, 2014. [doi]

Abstract

Abstract is missing.