摘要 : ? 2022 Elsevier Inc.The plan of this paper is to give an alternate proof of Kohn's subelliptic estimate for systems of N smooth complex vector fields on an open set of Rn, and to improve it in extending the result to perturbations... 展开 ? 2022 Elsevier Inc.The plan of this paper is to give an alternate proof of Kohn's subelliptic estimate for systems of N smooth complex vector fields on an open set of Rn, and to improve it in extending the result to perturbations by a first-order term. A pseudodifferential generalization will also be given. 收起