@INCOLLECTION{HeRuWa20, author = {{Heeren}, Behrend and {Rumpf}, Martin and {Wardetzky}, Max and {Wirth}, Benedikt}, title = {Discrete {R}iemannian calculus on shell space}, booktitle = {Geometric Partial Differential Equations - Part I}, series = {Handbook of Numerical Analysis}, publisher = {Elsevier}, year = {2020}, volume = {21}, editor = {Ricardo Nochetto and Andrea Bonito}, note = {in press} }