Bartels, Sören Projection-free approximation of geometrically constrained partial differential equations. (English) Zbl 1332.65161 Math. Comput. 85, No. 299, 1033-1049 (2016). MSC: 65N30 65N12 65N15 PDFBibTeX XMLCite \textit{S. Bartels}, Math. Comput. 85, No. 299, 1033--1049 (2016; Zbl 1332.65161) Full Text: DOI Link
Bartels, Sören Fast and accurate finite element approximation of wave maps into spheres. (English) Zbl 1316.65085 ESAIM, Math. Model. Numer. Anal. 49, No. 2, 551-558 (2015). Reviewer: Răzvan Răducanu (Iaşi) MSC: 65M60 58J45 35L70 35Q75 65M12 PDFBibTeX XMLCite \textit{S. Bartels}, ESAIM, Math. Model. Numer. Anal. 49, No. 2, 551--558 (2015; Zbl 1316.65085) Full Text: DOI
Bartels, Sören; Lubich, Christian; Prohl, Andreas Convergent discretization of heat and wave map flows to spheres using approximate discrete Lagrange multipliers. (English) Zbl 1198.65178 Math. Comput. 78, No. 267, 1269-1292 (2009). MSC: 65M12 65M60 35K55 35Q35 PDFBibTeX XMLCite \textit{S. Bartels} et al., Math. Comput. 78, No. 267, 1269--1292 (2009; Zbl 1198.65178) Full Text: DOI