## Recent Changes to the RTA List of Open Problems |

Only significant changes and additions are listed here.

August 26 | Marked Problem 66 as solved. | |

August 25 | Added Problem 107. | |

July 26 | Added Problem 106. | |

April 15 | Marked Problem 105 as solved (signaled by Johannes Waldmann) |

June 1 | Marked Problem 23 as solved. |

October 18 | Updated status of Problem 94. | |

January 25 | New Problem 105. |

October 16 | Marked Problem 94 as solved. | |

February 24 | The second question of Problem 101 is solved. |

November 23 | Added comment by Kristian Støvring to Problem 5. | |

November 3 | Marked Problem 104 as solved. | |

July 20 | Marked Problem 99 as solved. | |

July 18 | New Problem 104. | |

February 21 | Marked Problem 33 as solved. | |

February 17 | Marked Problem 47 as solved. | |

Clarified statement of Problem 29 (finest versus coarsest relation). | ||

February 16 | Added link on the main page to the Open. Closed. Open. paper. | |

Linked to this paper in Problem 13, Problem 20, Problem 21, Problem 87, Problem 95. | ||

February 14 | Marked Problem 18 as solved. | |

February 4 | Comments by Bruno Courcelle on Problem 70, Problem 71, Problem 72, Problem 73. | |

New Problem 102 and Problem 103. | ||

February 3 | Problem 20 is solved. |

October 14 | Marked Problem 81 as solved. | |

October 11 | Added Problem 101. | |

October 1 | Marked Problem 22 as solved. | |

September 8 | Marked Problem 11 as solved. | |

June 12 | Marked Problem 63 as solved. Reference to the journal article. | |

June 11 | Added remark about papers by D. Walukiewicz and F. Blanqui in Problem 50. | |

February 3 | Added reference to Lepper’s PhD thesis in Problem 81. | |

February 2 | Added reference to I&C article in Problem 3. |

June 20 | Added reference to Geser’s paper at RTA’03 to Problem 21. | |

May 28 | Added comment by R. M. Verma to Problem 63. |

October 17 | Added Problem 100. | |

October 10 | Added to Problem 92: Reference to Plandowski’s paper at FOCS’99. | |

October 9 | Added Problem 99. | |

October 9 | Addition to Problem 90: Reference to Levy/Villaret paper at RTA 2002. | |

October 3 | Marked Problem 60 as solved, added reference to Aoto’s paper in JFLP. | |

October 3 | Added reference to Tiwari’s paper at LICS’02 to Problem 12. | |

September 16 | Corrected the originator of Problem 97, as indicated by Johannes Waldmann. | |

Mai 6 | Added solution to Problem 12 | |

April 31 | Added comment by Kai Scheffermann to Problem 11. |

October 16 | Added results by Yamada et. al. to Problem 16. |

December 20 | Added comment by Hansjörg Lehner to Problem 82. | |

November 27 | Added comment by Jean Goubault-Larrecq to Problem 88. | |

August 28 | Added Problem 98. | |

July 20 | Additions to Problem 90: papers of Schmidt-Schaußand Schulz (CADE’99) and Levy and Villaret (RTA’00). | |

July 17 | Updated Problem 94: papers of Schubert, Vorobyov, Wierzbicki. | |

July 17 | Added Problem 96 and Problem 97. | |

July 4 | Added comment by Ingo Lepper to Problem 81. |

August 2 | Added reference to Problem 95 sent by H. Zantema. | |

July 16 | Solution to Problem 25. | |

July 16 | Added Problem 93, Problem 94, and Problem 95. | |

March 5 | Added comment submitted by Vincent van Oostrom to Problem 26. | |

February 18 | Solutions to Problem 34 and Problem 85. |

September 14 | Added Problem 92. | |

May 5 | Added comment submitted by Hans Zantema to Problem 60. | |

April 30 | Added Problem 91. | |

April 27 | Added Problem 90. | |

April 27 | Added remark on Okui’s paper at RTA’98 to Problem 13. | |

April 27 | Added comment submitted by Miki Hermann to Problem 43. | |

April 23 | Added comment submitted by Jordi Levy to Problem 32. | |

April 23 | Added remark on the paper of Comon et. al. at LICS 98 to Problem 64. |

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