JournalspmVol. 74, No. 3Volume 74, No. 3 (2017) Portugaliae Mathematicapp. 171–172Special issue on computational algebraJoão AraújoPeter J. Cameronpp. 173–200Two variants of the Froidure–Pin Algorithm for finite semigroupsJulius JonušasJames D. MitchellMarkus Pfeifferpp. 201–212Finding intermediate subgroupsAlexander Hulpkepp. 213–232Synchronization and separation in the Johnson schemesMohammed AljohaniJohn BambergPeter J. Cameronpp. 233–242On classifying objects with specified groups of automorphisms, friendly subgroups, and Sylow tower groupsLeonard H. Soicherpp. 243–255Commutativity theorems for groups and semigroupsFrancisco AraújoMichael Kinyonpp. 257–266A new class of monohedral pentagonal spherical tilings with GeoGebraAna M. d'Azevedo BredaJosé M. Dos Santos Dos Santos
pp. 173–200Two variants of the Froidure–Pin Algorithm for finite semigroupsJulius JonušasJames D. MitchellMarkus Pfeiffer
pp. 213–232Synchronization and separation in the Johnson schemesMohammed AljohaniJohn BambergPeter J. Cameron
pp. 233–242On classifying objects with specified groups of automorphisms, friendly subgroups, and Sylow tower groupsLeonard H. Soicher
pp. 257–266A new class of monohedral pentagonal spherical tilings with GeoGebraAna M. d'Azevedo BredaJosé M. Dos Santos Dos Santos