Operators and Matrices · Volume 18, Issue 3 On number theoretic properties of the KdV frequencies 18-38 Pages 641-663 DOI 10.7153/oam-2024-18-38 Downloads Short PDF Full PDF PNG Authors Thomas Kappeler Jürg Kramer Keywords KdV equation finite gap solutions stability Hamiltonian perturbations resonances arithmetic algebraic geometry diophantine equations rational points Subject classes 37K10 35Q53 37K45 11D25 11D41 11G30 14G05