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In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.

Ordinary numerical integration causes systems of this type to deviate, so symplectic methods are often used instead. Systems of this type obey Liouville's Theorem, and their dynamics can be described by taking derivatives of a single function on phase space. Their evolutions are determined by the functions of the same name that express their energy in terms of momentum and positional coordinates. FTP, what are these dynamical systems named for the developer of quaternions
Output:
Science