C·L·西格尔(Siegel，Carl Ludwig)1896年12月31日生于德国柏林；1981年4月4日卒于德国格丁根。 西格尔的父母来自莱因地区，他是独生子，小时候对数学感兴趣，在柏林接受正规的初等教育，然后上实科中学及高级实科中学。他对中学的数学课无兴趣，只是为了弥补自己数学知识的不足。他到柏林市立图书馆借阅H·韦伯(Weber)的名著《代数学》(Algebra)，这可能是他接触代数数论的开始。1915年中学毕业后，第一次世界大战正激烈进行，他对战争很反感，于是便选择了与人间世事最不相干的天文学作为自己的专业。1915年秋在柏林大学注册。他后来研究了天文学中的三体问题，主要是有关三体问题的几何图形渐近地接近拉格朗日特解的图形。而且碰撞方向是确定的。在一般情况下解析开拓是不可能的。1956年出版了《天体力学讲义》(Yorlesunge...(展开全部)

没有人会对超越认知的事物拥有精神上的抵抗力，其最明显表现出来的便是恐惧。 但是对于两个近乎于天才的驱魔师来说，他们的认知已经是没有界限或者说是已经界限模糊的。 不过，不疯掉是这些事情中最先要求做到也是最简单做到的，因为以此往后，想象力根本毫...

Why do many flowers have five or eight petals, but very few six or seven? Why do snowflakes have sixfold symmetry? Why do tigers have stripes but leopards have spots? Mathematics is to nature as Sherlock Holmes is to evidence. Mathematics can look at a single snowflake and deduce the atomic geometry of its crystals; it can start with a violin string and uncover the existence ...(展开全部)

Why do many flowers have five or eight petals, but very few six or seven? Why do snowflakes have sixfold symmetry? Why do tigers have stripes but leopards have spots? Mathematics is to nature as Sherlock Holmes is to evidence. Mathematics can look at a single snowflake and deduce the atomic geometry of its crystals; it can start with a violin string and uncover the existence ...(展开全部)

Most art and technology projects pair artists with engineers or scientists: the artist has the conception, and the technical person provides the know-how. John Maeda is an artist and a computer scientist, and he views the computer not as a substitute for brush and paint but as an artistic medium in its own right. Design By Numbers is a reader-friendly tutorial on both the philo...(展开全部)

Most art and technology projects pair artists with engineers or scientists: the artist has the conception, and the technical person provides the know-how. John Maeda is an artist and a computer scientist, and he views the computer not as a substitute for brush and paint but as an artistic medium in its own right. Design By Numbers is a reader-friendly tutorial on both the philo...(展开全部)