Bratti, G. About a remarkable differential operator in the algebra of holonomy modules. (Italian. English summary) Zbl 0916.47036 Rend. Semin. Mat., Torino 55, No. 1, 85-92 (1997). Summary: We characterize the elements \(Q\in A_1(\mathbb{C})\) such that the ideal \(A_1(\mathbb{C})Q\) is maximal in \(A_1(\mathbb{C})\).We give also sufficient conditions on the operator \(P= D_1+ pD_2+ q\in A_2(\mathbb{C})\) to have the maximality of \(A_2(\mathbb{C})P\) in \(A_2\). MSC: 47E05 General theory of ordinary differential operators Keywords:algebra of holonomy modules; ideal; maximal PDFBibTeX XMLCite \textit{G. Bratti}, Rend. Semin. Mat., Torino 55, No. 1, 85--92 (1997; Zbl 0916.47036)