document.write("«&nbsp;<a href='/news/view?id=75451'>Canonical extensions and ultraproducts of polarities. (arXiv:1709.09798v1 [math.LO])</a>");document.write(" | ");document.write("<a href='/news/view?id=75453'>Chinese Researchers Correct Genetic Mutation In Embryos Using Base Editing</a>&nbsp;»");