document.write("« Convergence of normalized Betti numbers in nonpositive curvature. (arXiv:1811.02520v2 [math.GT] UPDATED)");document.write(" | ");document.write("Cyclewidth and the Grid Theorem for Perfect Matching Width of Bipartite Graphs. (arXiv:1902.01322v2 [math.CO] UPDATED) »");