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Robert Bryant
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This is a consequence of Maclean's theorem. Since the $n$-torus itself is flat, a basis of the harmonic $1$-forms on $T^n$ are linearly independent at every point, so it follows from the description that Maclean gives in his theorem that the small deformations of $T^n$ as a special Lagrangian torus must be an $n$-parameter family that foliates a neighborhood of $T^n$ in $X$.

Robert Bryant
  • 108.4k
  • 8
  • 342
  • 453