In the SIGGRAPH 2014 paper [SvTSH14] an approach for animating deformable objects using sparse spacetime constraints is introduced. This report contains the proofs of two theorems presented in the paper.
Cite
@article{arxiv.1405.1902,
title = {Proofs of two Theorems concerning Sparse Spacetime Constraints},
author = {Christian Schulz and Christoph von Tycowicz and Hans-Peter Seidel and Klaus Hildebrandt},
journal= {arXiv preprint arXiv:1405.1902},
year = {2014}
}