1 citations · 1 across the 2 of their papers we have counts for
4 papers
Biharmonic Hermitian vector bundles over compact Kaehlar Einstein manifolds
Hajime Urakawa
In this paper, we show that, for every Hermitian vector bundle over a compact Kaehler Einstein manifold, if the projection is biharmonic, then it is harmonic.
Harmonic morphisms of Allof-Wallach spaces of positive curvature
Hajime Urakawa
An infinite family of distinct harmonic morphisms with minimal circle fibers from the 7-dimensional homogeneous Allof-Wallach spaces of positive curvature onto the 6-dimensional fl…
Harmonic maps and biharmonic Riemanian submersions
Hajime Urakawa
Characterizations for Riemannian submersions to be harmonic or biharmonic are shown. Examples of biharmonic but not harmonic Riemannian submersions are shown.
Biharmonic homogeneous hypersurfaces in compact symmetric spaces
Shinji Ohno, Takashi Sakai, Hajime Urakawa
In this paper, we study biharmonic hypersurfaces in Einstein manifolds. Then, we determine all the biharmonic hypersurfaces in irreducible symmetric spaces of compact type which ar…