9. 致谢 (Acknowledgements)

我们感谢 Steve Casner, Joerg Ott, Christer Holmberg, Gunnar Hellstrom, Randell Jesup, Hadriel Kaplan, Harikishan Desineni, Stephan Wenger, Jonathan Rosenberg, Roni Even, Ingemar Johansson, Dave Singer, Kevin Johns, 和 David Black 对本备忘录提出意见. 本工作部分得到了 UK Engineering and Physical Sciences Research Council 的支持.