Albert Einstein remarked towards the end of his career that he only went to his office at Princeton 'just to have the privilege of walking home with Kurt Godel'. They had both fled Europe and the clutches of Nazism and found rare solace in each other's company in foreign exile. Godel was one of the few people to understand the philosophical implications of Einstein's theories of the universe - and would later honour Einstein's seventieth birthday by addressing his theories directly, proving time to be an ideal. This extraordinary friendship is one of the most remarkable of the twentieth century.

帕利•尤格拉（Palle Yourgrau）,出生于南非的约翰内斯堡,八岁时前往美国。毕业于康乃尔大学,之后取得加州大学洛杉矶分校（UCLA）的博士学位。主要的研究兴趣为德国逻辑学家佛雷格（Frede）与奥地利数学家哥德尔。他于1999年出版的专题著作《当哥德尔遇见爱因斯坦：哥德尔宇宙中的时光旅行》（Gödel Meets Einstein : Time Travel in the Godel Universe）探索了哥德尔的宇宙论在哲学上的重要性,也让哥德尔的时间与相对论观点再度引发热潮。目前为美国布兰戴斯大学哲学系助理教授,现居马萨诸塞州。

尤斯德,一个希望能传播知识的人,译有《数学让脑袋变灵光》等。

马自恒,现任中央研究院信息科学研究所副研究员。毕业于国立台湾大学资讯工程学系学士、美国范德堡大学（Vanderbilt University ）计算器科学博士。研究兴趣为计算方法设计、图论、图论算法、半序。