Digamma cleanup
* Added permission from cephes author to use his code
* Cleanup in ArrayCwiseUnaryOps
diff --git a/Eigen/src/Core/SpecialFunctions.h b/Eigen/src/Core/SpecialFunctions.h
index 8cf26f4..bd02294 100644
--- a/Eigen/src/Core/SpecialFunctions.h
+++ b/Eigen/src/Core/SpecialFunctions.h
@@ -13,6 +13,29 @@
namespace Eigen {
namespace internal {
+// Parts of this code are based on the Cephes Math Library.
+//
+// Cephes Math Library Release 2.8: June, 2000
+// Copyright 1984, 1987, 1992, 2000 by Stephen L. Moshier
+//
+// Permission has been kindly provided by the original author
+// to incorporate the Cephes software into the Eigen codebase:
+//
+// From: Stephen Moshier
+// To: Eugene Brevdo
+// Subject: Re: Permission to wrap several cephes functions in Eigen
+//
+// Hello Eugene,
+//
+// Thank you for writing.
+//
+// If your licensing is similar to BSD, the formal way that has been
+// handled is simply to add a statement to the effect that you are incorporating
+// the Cephes software by permission of the author.
+//
+// Good luck with your project,
+// Steve
+
namespace cephes {
/* polevl (modified for Eigen)
@@ -178,11 +201,6 @@
* message condition value returned
* psi singularity x integer <=0 INFINITY
*/
- /*
- Cephes Math Library Release 2.2: June, 1992
- Copyright 1984, 1987, 1992 by Stephen L. Moshier
- Direct inquiries to 30 Frost Street, Cambridge, MA 02140
- */
EIGEN_DEVICE_FUNC
static float run(float xx) {
float p, q, nz, x, s, w, y, z;
@@ -297,10 +315,6 @@
* psi singularity x integer <=0 INFINITY
*/
- /*
- * Cephes Math Library Release 2.8: June, 2000
- * Copyright 1984, 1987, 1992, 2000 by Stephen L. Moshier
- */
double p, q, nz, s, w, y, z;
bool negative;
diff --git a/Eigen/src/plugins/ArrayCwiseUnaryOps.h b/Eigen/src/plugins/ArrayCwiseUnaryOps.h
index e818ac5..2ce7414 100644
--- a/Eigen/src/plugins/ArrayCwiseUnaryOps.h
+++ b/Eigen/src/plugins/ArrayCwiseUnaryOps.h
@@ -321,9 +321,6 @@
/** \returns an expression of the coefficient-wise digamma (psi, derivative of lgamma).
*
- * Example: \include Cwise_digamma.cpp
- * Output: \verbinclude Cwise_digamma.out
- *
* \sa cos(), sin(), tan()
*/
inline const DigammaReturnType
