The Formula of the Elementary Solution Matrix of the 3-Dimensional Linear System
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Abstract
It is well known that the solution of the n-dimensional constant coefficient linearsystem X=AX, X(0)=η can be represented as in which, for all j, λi, is the n-th characteristic root of A, and vj is the element ofthe solution space of (A-λj I)n ju=0 and η=v1 +… +vk. From this, we can getthe elementary solution matrix EXPAt of the system. However, this is not a conve-nient method if it is used directly in computation, because to find vj would involve acomplicated process. This paper gives a direct calculation method where by to solve theproblem of the 3-dimensional systems. The EXPAt can be represented by the elemen-ts of A, which will bring about convenient in calculation.
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