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FilledSmallSquareInverseBetaRegularized[s, a, b] gives the inverse of the regularized incomplete beta function.

FilledSmallSquare Mathematical function (see Section A.3.10).

FilledSmallSquare With the regularized incomplete beta function defined by , InverseBetaRegularized[s, a, b] is the solution for in .

FilledSmallSquareInverseBetaRegularized[, s, a, b] gives the inverse of BetaRegularized[, z, a, b].

FilledSmallSquare Note that the arguments of InverseBetaRegularized are arranged differently than in InverseGammaRegularized.

FilledSmallSquare See The Mathematica Book: Section 3.2.10.

FilledSmallSquare See also: InverseGammaRegularized, InverseErf.