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He has supervised numerous PhD students who are now famous computer scientists; these include Nancy Lynch, Leonid Levin, Jeanne Ferrante, Charles Rackoff, Larry Stockmeyer, David Harel, Joseph Halpern, and John C. Mitchell.
Because of their hierarchical nature, P systems are often depicted graphically with drawings that resemble Venn diagrams or David Harel's Higraph (see Statechart).