New problems complete for nondeterministic log space

@article{Jones2005NewPC,
  title={New problems complete for nondeterministic log space},
  author={Neil D. Jones and Y. Edmund Lien and William T. Laaser},
  journal={Mathematical systems theory},
  year={2005},
  volume={10},
  pages={1-17}
}
It is shown that a variety of problems have computational complexity equivalent to that of finding a path through a directed graph. These results, which parallel those of Karp at a lower complexity level, concern satisfiability of propositional formulas with two literals per clause, generation of elements by an associative binary operation, solution of linear equations with two variables per equation, equivalence of generalized sequential machines with final states, and deciding theLL(k) andLR… 
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