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Tom
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It is known that small deformations of a manifold $X$ in Fujiki class $\mathcal C$ might no longer be in $\mathcal C$, see This paper for example.

However, mythe following question is still open:

For any $X$ in $\mathcal C$, does there always exists a deformation $\pi:\mathcal X\to B$ of $X$, such that for any small neighborhood $U$ of $X$, there exists a fiberKähler deformation $X_t:=\pi^{-1}(t)$ in it which is Kählerwith $t\in U$?

Does anyone has any counterexample?

It is known that small deformations of a manifold $X$ in Fujiki class $\mathcal C$ might no longer be in $\mathcal C$, see This paper for example.

However, my question is:

For any $X$ in $\mathcal C$, does there always exists a deformation $\pi:\mathcal X\to B$ of $X$, such that for any small neighborhood of $X$, there exists a fiber $X_t:=\pi^{-1}(t)$ in it which is Kähler?

Does anyone has any counterexample?

It is known that small deformations of a manifold $X$ in Fujiki class $\mathcal C$ might no longer be in $\mathcal C$, see This paper for example.

However, the following question is still open:

For any $X$ in $\mathcal C$, does there always exists a deformation $\pi:\mathcal X\to B$ of $X$, such that for any small neighborhood $U$ of $X$, there exists a Kähler deformation $X_t:=\pi^{-1}(t)$ with $t\in U$?

Does anyone has any counterexample?

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Tom
  • 471
  • 4
  • 19

It is known that small deformations of a manifold $X$ in Fujiki class $\mathcal C$ might no longer be in $\mathcal C$, see This paper for example.

However, my question is:

For any $X$ in $\mathcal C$, does there always exists a deformation $\pi:\mathcal X\to B$ of $X$, such that for any small neighborhood of $X$, there exists a fiber $X_t:=\pi^{-1}(t)$ in it which is Kähler?

Does anyone has any counterexample?

It is known that small deformations of a manifold $X$ in Fujiki class $\mathcal C$ might no longer be in $\mathcal C$, see This paper for example.

However, my question is:

For any $X$ in $\mathcal C$, does there always exists a deformation $\pi:\mathcal X\to B$ of $X$, such that for any small neighborhood of $X$, there exists a fiber $X_t:=\pi^{-1}(t)$ which is Kähler?

Does anyone has any counterexample?

It is known that small deformations of a manifold $X$ in Fujiki class $\mathcal C$ might no longer be in $\mathcal C$, see This paper for example.

However, my question is:

For any $X$ in $\mathcal C$, does there always exists a deformation $\pi:\mathcal X\to B$ of $X$, such that for any small neighborhood of $X$, there exists a fiber $X_t:=\pi^{-1}(t)$ in it which is Kähler?

Does anyone has any counterexample?

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Tom
  • 471
  • 4
  • 19

Any manifold in Fujiki class $\mathcal C$ admits a Kähler deformation?

It is known that small deformations of a manifold $X$ in Fujiki class $\mathcal C$ might no longer be in $\mathcal C$, see This paper for example.

However, my question is:

For any $X$ in $\mathcal C$, does there always exists a deformation $\pi:\mathcal X\to B$ of $X$, such that for any small neighborhood of $X$, there exists a fiber $X_t:=\pi^{-1}(t)$ which is Kähler?

Does anyone has any counterexample?