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"""Special mathematical functions.
Provides special functions backed by the SciRS2 Rust implementation.
The API mirrors ``scipy.special`` for easy migration.
Functions
---------
gamma : Gamma function Γ(x)
gammaln : Natural log of the absolute value of the gamma function
beta : Beta function B(a, b)
betaln : Natural log of the absolute value of the beta function
erf : Error function
erfc : Complementary error function
erfinv : Inverse of the error function
j0, j1, jn : Bessel functions of the first kind
y0, y1, yn : Bessel functions of the second kind
factorial : Exact factorial
comb : Binomial coefficient C(n, k)
"""
=