Remark on the Second Bounded Cohomology of Amalgamated Product of Groups
DOI:
https://doi.org/10.5644/SJM.01.1.05Abstract
For any cardinal number ${\mathcal M}$ we construct examples of amalgamated products and HNN extensions of groups such that the dimension of the space of second bounded cohomologies is at least ${\mathcal M}$. Also we describe the space of pseudocharacters of the group $GL(2,F_2[z]).$
2000 Mathematics Subject Classification. Primary: 20M15, 20M30, 39B82
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