document.write("« An elementary and constructive proof of Grothendieck's generic freeness lemma. (arXiv:1807.01231v1 [math.AC])");document.write(" | ");document.write("Analogue of DP-coloring on variable degeneracy and its applications on list vertex-arboricity and DP-coloring. (arXiv:1807.00815v1 [math.CO]) »");