@misc{AndrewsClutterbuckHauer, author = {Andrews, Ben and Clutterbuck, Julie and Hauer, Daniel}, title = {Non-concavity of the Robin ground state}, series = {Cambridge Journal of Mathematics}, volume = {8}, journal = {Cambridge Journal of Mathematics}, number = {2}, publisher = {International Press of Boston}, issn = {2168-0930}, doi = {10.4310/cjm.2020.v8.n2.a1}, pages = {243 -- 310}, language = {en} } @misc{ArendtHauer, author = {Arendt, Wolfgang and Hauer, Daniel}, title = {Maximal L2-regularity in nonlinear gradientsystems and perturbations of sublinear growth}, series = {Pure and Applied Analysis}, volume = {2}, journal = {Pure and Applied Analysis}, number = {1}, publisher = {Mathematical Sciences Publishers}, issn = {2578-5885}, doi = {10.2140/paa.2020.2.23}, pages = {23 -- 34}, language = {en} }