These problems which include the condition of contact binaries, the relationship of the exchanges of mass and energy and the conditions for starting and stopping of the mass exchange have been discussed in detail.

• 这些问题包括产生相接双星的条件、物质交换过程和能量交换过程的关系、相接双星中达到平衡和停止物质和能量交换的条件，外拉格朗日点的质量损失和角动量损失的计算、转动和潮汐效应对双星结构和演化的影响以及理论光变曲线变化性质等等。