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    • On some modifications and applications of the post correspondence problem 

      Sahla, Esa
      Turun yliopiston julkaisuja - Annales Universitatis Turkuensis, Ser A I: Astronomica, Chemica, Physica, Mathematica : 665 (Turun yliopisto, 04.03.2022)
      The Post Correspondence Problem was introduced by Emil Post in 1946. The problem considers pairs of lists of sequences of symbols, or words, where each word has its place on the list determined by its index. The Post ...