A q-analog of Schl\"afli and Gould identities on Stirling numbers
  Stirling numbers of both kinds are linked to each other via two combinatorial identities due to Schl\"afli and Gould. Using q-analogs of Stirling numbers defined as inversion generating functions, we provide q-analogs of the two identities. The proof is computational and we leave open the problem of finding a more combinatorial one. 
Matthieu Josuat-Verg\`es
math.CO