Abstract
We solve the problem of the evolution of convex quadrilaterals by applying the inverse weighted Fermat-Torricelli problem, the invariance property of the weighted Fermat-Torricelli point in the plane , two-dimensional sphere and the two-dimensional hyperboloid . This means that the property of plasticity is inherited by some evolutionary convex quadrilaterals. An important application is the connection of the Fermat-Torricelli point with the fundamental equation of P. de Fermat.
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Published by Heldermann Verlag, 2008. Rights now held by Banach Press LLC.
