Abstract
We consider solution operators of linear ordinary boundary problems with “too many” boundary conditions, which are not always solvable. These generalized Green’s operators are a certain kind of generalized inverses of differential operators. We answer the question when the product of two generalized Green’s operators is again a generalized Green’s operator for the product of the corresponding differential operators and which boundary problem it solves. Moreover, we show that—provided a factorization of the underlying differential operator—a generalized boundary problem can be factored into lower order problems corresponding to a factorization of the respective Green’s operators. We illustrate our results by examples using the Maple package IntDiffOp, where the presented algorithms are implemented.
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Korporal, A., Regensburger, G. (2014). Composing and Factoring Generalized Green’s Operators and Ordinary Boundary Problems. In: Barkatou, M., Cluzeau, T., Regensburger, G., Rosenkranz, M. (eds) Algebraic and Algorithmic Aspects of Differential and Integral Operators. AADIOS 2012. Lecture Notes in Computer Science, vol 8372. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-54479-8_5
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DOI: https://doi.org/10.1007/978-3-642-54479-8_5
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