@article{ApprichDieterichHoelligetal.2017, author = {Apprich, Christian and Dieterich, Annegret and H{\"o}llig, Klaus and Nava-Yazdani, Esfandiar}, title = {Cubic spline approximation of a circle with maximal smoothness and accuracy}, volume = {56}, journal = {Computer Aided Geometric Design}, publisher = {Elsevier B.V.}, doi = {10.1016/j.cagd.2017.05.001}, pages = {1 -- 3}, year = {2017}, abstract = {We construct cubic spline approximations of a circle which are four times continuously differentiable and converge with order six.}, language = {en} } @misc{OPUS4-6433, title = {Annual Report 2016}, volume = {2016}, organization = {Konrad-Zuse-Zentrum f{\"u}r Informationstechnik Berlin}, issn = {0934-5892}, url = {http://nbn-resolving.de/urn:nbn:de:0297-zib-64339}, pages = {122}, year = {2017}, language = {en} }