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  /external/apache-commons-math/src/main/java/org/apache/commons/math/special/
Gamma.java 314 * <p>Computes the trigamma function of x. This function is derived by taking the derivative of
318 * @return trigamma(x) to within 10-8 relative or absolute error whichever is smaller
319 * @see <a href="http://en.wikipedia.org/wiki/Trigamma_function"> Trigamma at wikipedia </a>
323 public static double trigamma(double x) { method in class:Gamma
337 return trigamma(x + 1) + 1 / (x * x);
  /prebuilts/gcc/linux-x86/host/x86_64-w64-mingw32-4.8/share/doc/mpfr/
TODO 210 + Trigamma Function psi'(x).

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