From 57239f4a8149dbd603ad376e90a0a4574b846710 Mon Sep 17 00:00:00 2001
From: Till Hoffmann <tillahoffmann@gmail.com>
Date: Fri, 1 Apr 2016 14:35:21 +0100
Subject: Added polygamma function.

---
 unsupported/Eigen/CXX11/src/Tensor/TensorBase.h | 6 ++++++
 1 file changed, 6 insertions(+)

(limited to 'unsupported/Eigen/CXX11/src/Tensor/TensorBase.h')

diff --git a/unsupported/Eigen/CXX11/src/Tensor/TensorBase.h b/unsupported/Eigen/CXX11/src/Tensor/TensorBase.h
index 7c427d3c1..65b969aaf 100644
--- a/unsupported/Eigen/CXX11/src/Tensor/TensorBase.h
+++ b/unsupported/Eigen/CXX11/src/Tensor/TensorBase.h
@@ -138,6 +138,12 @@ class TensorBase<Derived, ReadOnlyAccessors>
     zeta() const {
         return unaryExpr(internal::scalar_zeta_op<Scalar>());
     }
+    
+    EIGEN_DEVICE_FUNC
+    EIGEN_STRONG_INLINE const TensorCwiseUnaryOp<internal::scalar_polygamma_op<Scalar>, const Derived>
+    polygamma() const {
+        return unaryExpr(internal::scalar_polygamma_op<Scalar>());
+    }
 
     EIGEN_DEVICE_FUNC
     EIGEN_STRONG_INLINE const TensorCwiseUnaryOp<internal::scalar_erf_op<Scalar>, const Derived>
-- 
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