%0 Journal Article %J Journal of Numerical Mathematics %D 2021 %T The deal.II Library, Version 9.3 %A Daniel Arndt %A Wolfgang Bangerth %A Bruno Blais %A Marc Fehling %A Rene Gassmöller %A Timo Heister %A Luca Heltai %A Uwe Köcher %A Martin Kronbichler %A Matthias Maier %A Peter Munch %A Jean-Paul Pelteret %A Sebastian Proell %A Konrad Simon %A Bruno Turcksin %A David Wells %A Jiaqi Zhang %B Journal of Numerical Mathematics %G eng %U https://doi.org/10.1515/jnma-2021-0081