1. Fundamental gaps of spherical triangles

   • Shoo Seto
   • Guofang Wei
   • Xuwen Zhu

   OriginalPaper 30 July 2021 Pages: 1 - 19

   

2. Polar varieties and bipolar surfaces of minimal surfaces in the n-sphere

   • Katsuhiro Moriya

   OriginalPaper Open access 06 August 2021 Pages: 21 - 36

3. Upper bounds for Steklov eigenvalues of subgraphs of polynomial growth Cayley graphs

   • Léonard Tschanz

   OriginalPaper Open access 06 September 2021 Pages: 37 - 55

   

4. On blow-up formula of integral Bott–Chern cohomology

   • Youming Chen
   • Song Yang

   OriginalPaper 09 September 2021 Pages: 57 - 67

5. Integral formulas for a Riemannian manifold with orthogonal distributions

   • Vladimir Rovenski

   OriginalPaper 01 October 2021 Pages: 69 - 88

6. Characterization of hypersurfaces in four-dimensional product spaces via two different Spin^c structures

   • Roger Nakad
   • Julien Roth

   OriginalPaper 07 October 2021 Pages: 89 - 114

7. Transverse J-holomorphic curves in nearly Kähler \(\mathbb {CP}^3\)

   • Benjamin Aslan

   OriginalPaper Open access 11 October 2021 Pages: 115 - 157

   

8. Normal form of equivariant maps in infinite dimensions

   • Tobias Diez
   • Gerd Rudolph

   OriginalPaper Open access 14 October 2021 Pages: 159 - 213