document.write("«&nbsp;<a href='/news/view?id=142598'>NASA brings a Hubble gyro back to life after a seven-year hibernation</a>");document.write(" | ");document.write("<a href='/news/view?id=142600'>New Bounds for the Dichromatic Number of a Digraph. (arXiv:1810.09427v1 [math.CO])</a>&nbsp;»");