Comment on "Broken translational and rotational symmetry via charge   stripe order in underdoped YBa2Cu3O6+y"
  Comin et al. [Science 347, 1335 (2015)] have interpreted their resonant X-ray scattering experiment as indicating that charge inhomogeneities in the family of high-temperature superconductors YBa2Cu3O6+y (YBCO) have the character of one-dimensional stripes rather than two-dimensional checkerboards. The present comment shows that one cannot distinguish between stripes and checkerboards on the basis of the above experiment. 
Boris V. Fine
cond-mat.supr-con