VOLUME 25 2020 NUMBER 4

Aubrey Blecher, Charlotte Brennan, Arnold Knopfmacher, Toufik Mansour, Mark Shattuck:
Counting Permutations by the Number of Vertical Edges in Their Bargraphs279–290
Pascal Caron, Jean-Gabriel Luque, Bruno Patrou:
A Combinatorial Approach for the State Complexity of the Shuffle Product291–320
Kalpana Mahalingam, Prithwineel Paul:
On Szilard Languages of InsDel Systems321–348
Niklas Zechner:
Derivatives of Regular Expressions with Cuts349–355