Comment on 'Linking Spatial Distributions of Potential and Current in   Viscous Electronics'
  In recent paper of Falkovich and Levitov it was shown, that geometry of separatrixes for viscous electronic flow in graphene is sensitive to boundary conditions. Here we discover theis relation in details. Also we propose, how boundary conditions could be probed experimentally, using weak magnetic field and observed features of separatrixes. 
M. Semenyakin
cond-mat.mes-hall