标题： 3+1数值相对论初始数据的构建 显示英文标题

标题： Construction of initial data for 3+1 numerical relativity

摘要： 本讲座致力于计算3+1一般相对论的柯西问题的初始数据的问题。 主要任务是求解约束方程。 介绍了由Lichnerowicz引入并由York改进的共形技术。 讨论并用一些简单示例说明了两种标准方法，即共形横截面-无迹方法和共形薄沙方法。 最后给出了关于双星系统（黑洞和中子星）初始数据的简要综述。 显示英文摘要

摘要： This lecture is devoted to the problem of computing initial data for the Cauchy problem of 3+1 general relativity. The main task is to solve the constraint equations. The conformal technique, introduced by Lichnerowicz and enhanced by York, is presented. Two standard methods, the conformal transverse-traceless one and the conformal thin sandwich, are discussed and illustrated by some simple examples. Finally a short review regarding initial data for binary systems (black holes and neutron stars) is given.