I am instructor of Theory of Automata/Computational theory. I have excellent concepts of ,Regular Languages, Nondeterminism, Regular Expressions,Nonregular Languages, Context-Free Languages, Context-free Grammars, Pushdown Automata, Non-context-free Languages, The Church-Turing Thesis,Turing MachinesVariants of Turing Machines,Decidability,Decidable Languages,The Halting Problem,Reducibilit and Time Complexity. PLEASE see my PROFILE and REVIES as well. Thank You