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I'm trying to implement a cryptographic scheme that leverages constant-sized polynomial commitments by Kate et al [1].

I'm looking for a library that can interpolate a polynomial fast via FFT in a finite field, but from values at arbitrary points (i.e., not roots of unity). A technique for doing this in O(n log^2(n)) time for n points is described in "Fast evaluation and interpolation," by H. T. Kung.

I'm aware of:

...but AFAICT none of them seem to support interpolation from values at arbitrary points.

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