@Misc{ DraLiuZha24, author = { Dragoni, Federica and Liu, Qing and Zhang, Ye }, title = { Horizontal semiconcavity for the square of Carnot-Carath\'eodory distance on step 2 Carnot groups and applications to Hamilton-Jacobi equations }, journal = { }, year = { 2024 }, pages = { }, URL = { http://cvgmt.sns.it/paper/6451/ }, note = { cvgmt preprint} }