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We consider the noncommutative space ℝ 3  λ , a deformation of the algebra of functions on ℝ 3  which yields a foliation of ℝ 3  into fuzzy spheres. We first review the construction of a natural matrix basis adapted to ℝ 3  λ . We thus consider the problem of defining a new Laplacian operator for the deformed algebra. We propose an operator which is not of Jacobi type. The implication for field theory of the new Laplacian is briefly discussed.

Noncommutative field theory on ℝ 3 λ