4.3 Article

AND YET IT MOVES: PARADOXICALLY MOVING LINKAGES IN KINEMATICS

Journal

BULLETIN OF THE AMERICAN MATHEMATICAL SOCIETY
Volume 59, Issue 1, Pages 59-95

Publisher

AMER MATHEMATICAL SOC
DOI: 10.1090/bull/1721

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Funding

  1. Austrian Science Fund (FWF) [P31061]
  2. Austrian Science Fund (FWF) [P31061] Funding Source: Austrian Science Fund (FWF)

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This paper investigates the configurations of mechanical linkages and provides mathematical explanations for unexpected mobility in some cases.
The possible configurations of a mechanical linkage correspond to the solutions of a system of algebraic equations. We can estimate the dimension of the solution set by counting free parameters and equational constraints. But this estimate does not always give the correct answer: sometimes the linkage moves although it should not. In this paper, we give mathematical explanations for this unexpected mobility.

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