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 On periodicizing functions Bull. Korean Math. Soc. 2006 Vol. 43, No. 2, 253-263 Published online June 1, 2006 Toshiki Naito and Jong Son Shin The University of Electro-Communications, The University of Electro-Communications Abstract : In this paper we introduce a new concept, a periodicizing'' function for the linear differential equation with the periodic forcing function. Moreover, we construct this function, which is closely related with the solution of a difference equation and an indefinite sum. Using this function, we can obtain a representation of solutions from which we see immediately the asymptotic behavior of the solutions. Keywords : periodicizing function, linear differential equation, linear difference equation, indefinite sum, representation of solution MSC numbers : Primary 33A30, 34C25, 34C11, 39A11; Secondary 34C27, 45M15 Downloads: Full-text PDF