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math.DG2004
Hermitian spin surfaces with small eigenvalues of the Dolbeault operator
Bogdan Alexandrov
We study the compact Hermitian spin surfaces with positive conformal scalar curvature on which the first eigenvalue of the Dolbeault operator of the spin structure is the smallest…
math.DG2004
On weak holonomy
Bogdan Alexandrov
We prove that SU(n) (n > 2) and Sp(n)U(1) (n > 1) are the only connected Lie groups acting transitively and effectively on some sphere which can be weak holonomy groups of a Rieman…