Volume & Issue: Volume 4, Issue 1, Summer and Autumn 2017 (Spring - Summer) 
1. Characterizations of amenable hypergroups

Pages 1-9

Ali Ghaffari; Mohammad Bagher Sahabi


3. On higher rank numerical hulls of normal matrices

Pages 23-32

Golamreza Aghamollaei; Sharifeh Rezagholi


5. Some results on the block numerical range

Pages 43-51

Mostafa Zangiabadi; Hamid Reza Afshin