document.write("«&nbsp;<a href='/news/view?id=115794'>$G_{\delta}$ sets in $\sigma$-ideals generated by compact sets. (arXiv:1807.00845v1 [math.LO])</a>");document.write(" | ");document.write("<a href='/news/view?id=115796'>$SO(4)$ Landau Models and Matrix Geometry. (arXiv:1712.07767v2 [hep-th] UPDATED)</a>&nbsp;»");