Journal of Mathematical Inequalities · Volume 14, Issue 4 A priori and posteriori error estimates of Legendre Galerkin spectral methods for general elliptic optimal control problems 14-65 Pages 989-1006 DOI 10.7153/jmi-2020-14-65 Downloads Short PDF Full PDF PNG Authors Zuliang Lu Fei Huang Lin Li Fei Cai Yin Yang Keywords general optimal control problems Legendre Galerkin spectral method a priori error estimate a posteriori error estimates Subject classes 49J20 65N30