document.write("« The best constant in the embedding of $W^{N,1}({\mathbb R}^N)$ into $L^\infty({\mathbb R}^N)$. (arXiv:1706.06928v1 [math.FA])");document.write(" | ");document.write("The derivative nonlinear Schr\"odinger equation on the half line. (arXiv:1706.06898v1 [math.AP]) »");