Upper bounds for the ground state energy of the Laplacian with zero magnetic field on planar domains Bruno ColboisAlessandro Savo OriginalPaper Open access 15 March 2021 Pages: 1 - 18
Sharp upper diameter bounds for compact shrinking Ricci solitons Jia-Yong Wu OriginalPaper 15 March 2021 Pages: 19 - 32
Holomorphic maps into Grassmann manifolds (harmonic maps into Grassmann manifolds III) Yasuyuki Nagatomo OriginalPaper 22 March 2021 Pages: 33 - 63
Typical field lines of Beltrami flows and boundary field line behaviour of Beltrami flows on simply connected, compact, smooth manifolds with boundary Wadim Gerner OriginalPaper Open access 12 April 2021 Pages: 65 - 82
The classification of flat Riemannian metrics on the plane Vincent E. Coll Jr.Lee B. Whitt OriginalPaper 19 April 2021 Pages: 83 - 96
Existence of a complete holomorphic vector field via the Kähler–Einstein metric Young-Jun ChoiKang-Hyurk Lee OriginalPaper 26 April 2021 Pages: 97 - 109
Homogeneous non-degenerate 3-(α,δ)-Sasaki manifolds and submersions over quaternionic Kähler spaces Ilka AgricolaGiulia DileoLeander Stecker OriginalPaper Open access 26 April 2021 Pages: 111 - 141
The contact mappings of a flat (2,3,5)-distribution Alex D. Austin OriginalPaper 26 April 2021 Pages: 143 - 156
Self-intersections of closed parametrized minimal surfaces in generic Riemannian manifolds John Douglas Moore OriginalPaper Open access 27 April 2021 Pages: 157 - 165
On the non-existence of common submanifolds of Kähler manifolds and complex space forms Xiaoliang ChengYihong Hao OriginalPaper 10 May 2021 Pages: 167 - 180