Mathematical Inequalities & Applications · Volume 15, Issue 3 Universal inequalities for eigenvalues of quadratic polynomial operator of the Kohn Laplacian 15-49 Pages 559-569 DOI 10.7153/mia-15-49 Downloads Short PDF Full PDF PNG Authors He-Jun Sun Xue-Rong Qi Keywords eigenvalue universal inequality Heisenberg group Kohn Laplacian quadratic polynomial operator Subject classes 35P15 53C17 58C40