document.write("« Derivative-Free Optimization of Noisy Functions via Quasi-Newton Methods. (arXiv:1803.10173v2 [math.OC] UPDATED)");document.write(" | ");document.write("Differential $\{e\}$-structures for equivalences of $2$-nondegenerate Levi rank $1$ hypersurfaces $M^5 \subset \mathbb{C}^3$. (arXiv:1901.02028v1 [math.DG]) »");