Power Series Proofs for Local Stabilities of Kähler and Balanced Structures With Mild -Lemma

By use of a natural map introduced recently by the first and third authors from the space of pure-type complex differential forms on a complex manifold to the corresponding one on the small differentiable deformation of this manifold, we will give a power series proof for Kodaira–Spencer’s local stability theorem of Kähler structures. We also obtain two new local stability theorems, one of balanced structures on an n -dimensional balanced manifold with the $(n-1,n)$ th mild ∂ ∂ ̄ -lemma by power series method and the other one on p -Kähler structures with the deformation invariance of $(p,p)$ -Bott–Chern numbers.