6.885: Folding and Unfolding in Computational Geometry (Fall 2004)

Prof. Erik Demaine

Lecture 3 -- Page 1 -- 200 DPI

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Lecture 3: Rigidity theory, generic rigidity, minimal generic rigidity, Henneberg characterization, Laman characterization, polynomial-time algorithm

Page 1: Flexibility, rigidity; depedence on configuration and not just linkage; complexity of this distinction (open)

You can download the paper by Koiran, where the NPR-hardness is via a small reduction from other results.

These are rough, personal lecture notes handwritten by Erik Demaine used during lecture. Their primary purpose is for reading/review by students of the class.

Printable PostScript (requires Level-2 PostScript)

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