Comments on "Bayesian Solution Uncertainty Quantification for   Differential Equations" by Chkrebtii, Campbell, Calderhead & Girolami
  We commend the authors for an exciting paper which provides a strong contribution to the emerging field of probabilistic numerics (PN). Below, we discuss aspects of prior modelling which need to be considered thoroughly in future work. 
Francois-Xavier Briol, Jon Cockayne and Onur Teymur
stat.CO math.NA