Comment on 'Towards gravitationally assisted negative refraction of
  light by vacuum'
Optical Tests of Nanoengineered Liquid Mirrors
Multiplex congruence network of natural numbers Coherent and Incoherent structures in systems described by the 1D CGLE:
  Experiments and Identification The Safari of Update Structures: Visiting the Lens and Quantum
  Enclosures 4D Dual-Tree Complex Wavelets for Time-Dependent Data Computing the fundamental group of a higher-rank graph Symplectic embeddings and continued fractions: a survey Kinematic signatures of reverberation mapping of close binaries of
  supermassive black holes in active galactic nuclei III. The case of
  elliptical orbits Optimal Entrainment of Neural Oscillator Ensembles An Experimental Comparison of SONC and SOS Certificates for
  Unconstrained Optimization Exploiting machine learning to efficiently predict multidimensional
  optical spectra in complex environments Vortex dynamics in nonrelativistic Abelian Higgs model Characteristic classes of smooth fibrations Natural radioelement concentration in the Troodos Ophiolite Complex of
  Cyprus Spectrum of hyperplane arrangements in four variables Orthogonal decompositions and twisted isometries Orthogonality relations and Cherednik identities for multivariable
  Baker-Akhiezer functions Matter waves in atomic-molecular condensates with Feshbach resonance
  management Interception in Distance-Vector Routing Networks Crossed flux homomorphisms and vanishing theorems for flux groups Eight Ultra-faint Galaxy Candidates Discovered in Year Two of the Dark
  Energy Survey
physics.optics physics.space-ph