document.write("«&nbsp;<a href='/news/view?id=70539'>Google-born startup thinks its time for a ground-source heat pump renaissance</a>");document.write(" | ");document.write("<a href='/news/view?id=70541'>Group Metrics for Graph Products of Cyclic Groups. (arXiv:1705.02582v2 [math.LO] UPDATED)</a>&nbsp;»");