issue 2 publication date 2015-02-01

• ASSOCIATED (SEMI)HYPERGROUPS FROM DUPLEXES
• ON THE EDGE COVER POLYNOMIAL OF CERTAIN GRAPHS
• ON ANNIHILATOR PROPERTIES OF INVERSE SKEW POWER SERIES RINGS
• COHEN-MACAULAY HOMOLOGICAL DIMENSIONS WITH RESPECT TO AMALGAMATED DUPLICATION
• COGENERATOR AND SUBDIRECTLY IRREDUCIBLE IN THE CATEGORY OF S-POSETS
• ON THE GROUPS WITH THE PARTICULAR NON-COMMUTING GRAPHS