这是本套书的第二册，适合具备一定折纸基础的研究者和折纸爱好者阅读使用，本书介绍与数学相结合的设计，通过严密的数学计算，探究一些更为复杂的折叠方法，其中包括树杈理论，描述折纸设计中树形折法所应用的数学知识以及蛇腹折纸、单轴形、多边形组合和混合基本型等。古老艺术之折纸设计的秘密第二版之一、古老艺术之折纸设计的秘密第二版之二
This is the second volume of this set of books, which is suitable for researchers and origami enthusiasts with a certain origami foundation to read and use. This book introduces the design combined with mathematics. Through rigorous mathematical calculation, it explores some more complex folding methods, including the theory of tree branches, describes the mathematical knowledge applied by the tree folding method in origami design, as well as snake belly origami, uniaxial, polygon combination and mixed basic forms.

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