Dimension-Free Matrix Spaces

Abstract: Based on various types of semi-tensor products of matrices, the corresponding equivalences of matrices are proposed. Then the corresponding vector space structures are obtained as the quotient spaces under equivalences, which are called the dimension-free Matrix spaces (DFESs). Certain structures and properties are investigated. Finaly, the Lie bracket structure of general linear algebra is extended to DfMSs to make them Lie algebras, called dimension-free general linear algebra (DFGLA). Inspire of the fact that the DFGLAs are of infinite dimension, they have most properties of finite dimensional Lie algebras, whicl are studied in the paper.