document.write("«&nbsp;<a href='/news/view?id=61511'>Google's Balloons Connect Flood-hit Peru</a>");document.write(" | ");document.write("<a href='/news/view?id=61513'>Graded Thread Modules over the Positive Part of the Witt (Virasoro) Algebra. (arXiv:1705.06076v1 [math.RT])</a>&nbsp;»");