L系统 L-system
（重定向自Graftal）
Lindenmayer系统，简称L系统，是由荷兰Utrecht大学的生物学和植物学家，匈牙利裔的林登麦伊尔（Aristid Lindenmayer）于1968年提出的有关生长发展中的细胞交互作用的数学模型，尤其被广泛应用于植物生长过程的研究。
L-system是一系列不同形式的正规语法规则，多被用于植物生长过程建模，但是也被用于模拟各种生物体的形态。L-system也能用于生成自相似的分形，例如迭代函数系统。
Graftal
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英语百科
L-system L系统
（重定向自Graftal）
An L-system or Lindenmayer system is a parallel rewriting system and a type of formal grammar. An L-system consists of an alphabet of symbols that can be used to make strings, a collection of production rules that expand each symbol into some larger string of symbols, an initial "axiom" string from which to begin construction, and a mechanism for translating the generated strings into geometric structures. L-systems were introduced and developed in 1968 by Aristid Lindenmayer, a Hungarian theoretical biologist and botanist at the University of Utrecht. Lindenmayer used L-systems to describe the behaviour of plant cells and to model the growth processes of plant development. L-systems have also been used to model the morphology of a variety of organisms and can be used to generate self-similar fractals such as iterated function systems.
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