document.write("«&nbsp;<a href='/news/view?id=146539'>Extending Babbage's (Non-)Primality Tests. (arXiv:1812.07650v1 [math.NT])</a>");document.write(" | ");document.write("<a href='/news/view?id=146541'>Extra pearls in graph theory. (arXiv:1812.06627v2 [math.CO] UPDATED)</a>&nbsp;»");