الفهرس 
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Abstract
In this thesis, raw-finite matrices and basic sets at polynomials are investigated.
Four main convergence properties of basic sets of polynomials associated with non singular matrix Functions F (P, Q) where P and Q are two commutative algebraic row-finite, matrices are investigated Five theorems are established.
Three main convergence properties of basic sets of polynomials of two complex variables associated with non-singular matrix functions F (P, Q) are investigated and three theorems are established.
Two problems are discussed The first is to the order of magnitude of the elements of a matrix function.
The second problem is the order, type on a circle, of basic sets of polynomials associated with non-singular matrix functions.