Necessary and sufficient conditions for the exact controllability and approximate controllability of a singular distributed parameter system are obtained. These general results are used to examine the exact controllability and approximate controllability of the Dzektser equation in the theory of seepage.

中文翻译：

---

温和解意义上的奇异分布参数系统的可控性

获得了奇异分布参数系统的精确可控制性和近似可控制性的充要条件。这些一般结果用于检查渗流理论中Dzektser方程的精确可控性和近似可控性。