- fixed differentiation of gamma(x)

[ginac.git] / ginac / inifcns.h

diff --git a/ginac/inifcns.h b/ginac/inifcns.h
index 42f3838919635a98b95f989e98a2d823d68cfe1c..0ccde8de774a9d2900581d905908fc17b82325cc 100644 (file)
--- a/ginac/inifcns.h
+++ b/ginac/inifcns.h
@@ -82,6 +82,9 @@ DECLARE_FUNCTION_1P(Li3)
 /** Gamma function. */
 DECLARE_FUNCTION_1P(gamma)
 
+/** Psi function (aka polygamma-function) */
+DECLARE_FUNCTION_2P(psi)
+    
 /** Factorial function. */
 DECLARE_FUNCTION_1P(factorial)