A new characterization of the closedness of the sum of two subspaces

作者：Chunyuan, Deng^*; Hongke, Du

来源：Acta Mathematica Scientia, 2008, 28(1): 17-23.

DOI：10.1016/S0252-9602(08)60003-X

• subspace
• projection
• sum of two closed subspaces

In this article, a new characterization of the closedness of the sum of two closed subspaces of a Hilbert space is established.

• 出版日期2008-1
• 单位陕西师范大学; 华南师范大学