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dag_path_length (557B)


      1 # Dag path length
      2 
      3 Given a [DAG] G, a source s and sink t, and a length l, decide whether there is an st-path of length l in G
      4 
      5 Generalization of [unary_subset_sum] (corresponds to a specific shape of [DAGs] with a sequence of [bottlenecks] and two parallel paths from one bottleneck to the next
      6 
      7 [Conditional_hardness] in [potechin2020lengths] for [NFA_unary_lengths]
      8 - reduction from [triangle_detection]
      9 
     10 Can be solved via [Boolean_matrix_multiplication]
     11 
     12 [dag_path_length_mine]
     13 
     14 Up: [path_length], [directed_acyclic_graph]
     15 
     16 See also: [bringmann2024nfa]