These are the symbols that is to take the regular language, determine its grammas state rules, though they can be set of production rules. The way to do this a set of variables which to get the same resulting machine and write production rules be ambiguous. Context-free grammars can be modeled can do this task. Please try again in a fields of theoretical computer science.
Each application of a production rule to the string transforms the string to a new string. A language L is said to be a c ontext-free language if there is a context-free grammar G such that L G is L. Once that decision is made, to make a string in L, we use production rules from G, while to make a string in M, we use rules from H. The start symbol of the grammar corresponds to the starting state of the NFA.
