Theorie Der Transformationsgruppen is a comprehensive German-language treatise on the theory of transformation groups, authored by Sophus Lie and Friedrich Engel. This foundational work explores the mathematical structures and properties of continuous groups of transformations, now known as Lie groups. It delves into the applications of these groups in the study of differential equations and other areas of mathematics.

This historical text provides a deep dive into the original concepts and methods developed by Lie, offering valuable insights for mathematicians, physicists, and historians of science. It remains a significant resource for understanding the development of modern group theory and its impact on various scientific disciplines.

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