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The *virtual pivot* is a monolithic structure that takes advantage of elastic deformation of matter. Under application of a torque, the two pairs of beams deform symmetrically, which ensures an almost pure rotation of the inner stage.
This is called a **virtual** pivot because the axis of rotation is found at the intersection of the undeformed beams.
Theoretical calculations (*strength of materials*) and practical application can be found in this [publication](http://dx.doi.org/10.1109/JMEMS.2012.2189367).
