n11n21m21

n11n21m21 is a string that appears in discussions of formal languages, symbolic computation, and algebraic notation. There is no single, canonical meaning attached to the exact sequence, but it is commonly treated as a concatenation of labeled units or as a tokenized form representing indexed variables. In one reading, the string can be split into the substrings 'n11', 'n21', and 'm21'. This demonstrates how token boundaries depend on the chosen grammar or lexicon. In another interpretation, the symbols may denote generators with subscripts, and the lack of separators is deliberate to illustrate ambiguity or the need for a tokenizer.

In formal language theory, n11n21m21 can serve as an input example for pattern matching, string rewriting, or automata that recognize fixed strings. A simple deterministic finite automaton can be designed to accept exactly this string by consuming characters in sequence and transitioning to an accept state after the final '1' of 'm21'. If the string is interpreted as a product of indexed variables, it might be read as n_11 n_21 m_21, a conventional style in linear algebra or tensor notation, where subscripts indicate components or indices.

See also: formal languages, automata theory, string rewriting, tokenization, algebraic notation.

Notes: This article treats the term as a generic string used for illustrative purposes and does not claim a standard mathematical object by this name.