document.write("« Effective Optimization Criteria and Relay Selection Algorithms for Physical-Layer Security in Multiple-Antenna Relay Networks. (arXiv:1712.09420v1 [cs.IT])");document.write(" | ");document.write("Eigenfunctions on a unit square domain and Polterovich's conjecture on the number of nodal domains. (arXiv:1712.09457v1 [math.SP]) »");