SERGIU KLAINERMAN|||Mathematical challenges of General Relativity|||105-122||| GUIDO CAVALLARO|||On the motion of a convex body interacting with a perfect gas in the mean-field approximation|||123-145||| LIGIA L. CRISTEA - FRIEDRICH PILLICHSHAMMER|||A lower bound for the b-adic diaphony|||147-153||| SILVIA NOSCHESE - LIONELLO PASQUINI|||Zero-structured matrix modifications keeping essentially unaltered sets of eigenvalues|||155-182||| LUCA FABRIZIO DI CERBO|||Eigenvalues of the Laplacian under the Ricci flow|||183-195|||