Spectral problems for the Dirac operator specified on a finite interval with regular, but not strongly regular boundary conditions and a complex-valued integrable potential are studied. This work is aimed at finding the conditions under which the root function system forms a common Riesz basis rather than a Riesz basis with parentheses.

中文翻译：

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狄拉克算子的正则边值问题

研究了在有限区间上指定的 Dirac 算子的谱问题，该区间具有规则但不是强规则的边界条件和复值可积势。这项工作旨在寻找根函数系统形成公共 Riesz 基而不是带括号的 Riesz 基的条件。