Frontmatter

GROUPS COMPLEXITY CRYPTOLOGY MANAGING EDITORS Vladimir Shpilrain, New York Pascal Weil, Bordeaux EDITORIAL BOARD Simon R. Blackburn, London Marston Conder, Auckland Patrick Dehornoy, Caen Bettina Eick, Braunschweig Ben Fine, Fairfield Robert Gilman, Hoboken Dima Grigoriev, Lille Ki Hyoung Ko, Daejeon Martin Kreuzer, Passau Alexander V. Mikhalev, Moscow Alexei Myasnikov, Hoboken Vitalii Romankov, Omsk Gerhard Rosenberger, Hamburg Mark Sapir, Nashville Sven Schäge, Bochum Rick Thomas, Leicester Boaz Tsaban, Ramat Gan Enric Ventura Capell, Barcelona GROUPS ­ COMPLEXITY ­ CRYPTOLOGY is a journal for speedy publication of articles in the areas of combinatorial and computational group theory, complexity theory, and cryptology. Preference is given to papers that touch upon at least two of these areas, but strong papers representing just one of the areas are considered, too. The journal primarily publishes research papers, but comprehensive and timely survey articles on a topic inside the scope of the journal are also welcome. All submitted papers are peerreviewed before publication. All information regarding notes for contributors, subscriptions, Open access and orders is available online at www.degruyter.com/gcc. ABSTRACTED/INDEXED IN Celdes·CNKIScholar(ChinaNationalKnowledgeInfrastructure)·CNPIEC·DBLPComputerScienceBibliography ·EBSCO-TOCPremier·EBSCODiscoveryService·Elsevier-SCOPUS·GoogleScholar·J-Gate·MathematicalReviews(MathSciNet)· Naviga(Softweco)·PrimoCentral(ExLibris)·SCImago(SJR)·Summon(SerialsSolutions/ProQuest)·TDOne(TDNet)·Ulrich'sPeriodicals Directory/ulrichsweb·WorldCat(OCLC)·ZentralblattMath ISSN1867-1144·e-ISSN1869-6104·CODENGCCRC9 RESPONSIBLE EDITORS VladimirShpilrain,DepartmentofMathematics,TheCityCollegeofNewYork,NewYork,NY10031,USA. Email:shpil@groups.sci.ccny.cuny.edu...