  Differential and double-differential cross sections for the production of top
quark pairs in proton-proton collisions at 13 TeV are measured as a function of
jet multiplicity and of kinematic variables of the top quarks and the top
quark-antiquark system. This analysis is based on data collected by the CMS
experiment at the LHC corresponding to an integrated luminosity of 2.3 inverse
femtobarns. The measurements are performed in the lepton+jets decay channels
with a single muon or electron in the final state. The differential cross
sections are presented at particle level, within a phase space close to the
experimental acceptance, and at parton level in the full phase space. The
results are compared to several standard model predictions.
