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- added comment about more recent terminology involving eta(x,y).
author
Richard Kreckel
<Richard.Kreckel@uni-mainz.de>
Tue, 14 Aug 2001 21:09:16 +0000
(21:09 +0000)
committer
Richard Kreckel
<Richard.Kreckel@uni-mainz.de>
Tue, 14 Aug 2001 21:09:16 +0000
(21:09 +0000)
ginac/inifcns.cpp
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diff --git
a/ginac/inifcns.cpp
b/ginac/inifcns.cpp
index 5ebd3d02139b153efa647263a232b956fb7bf5cc..50ec3ec8a97dd7f92cfd241f03a1d41021abd0df 100644
(file)
--- a/
ginac/inifcns.cpp
+++ b/
ginac/inifcns.cpp
@@
-126,6
+126,8
@@
REGISTER_FUNCTION(csgn, eval_func(csgn_eval).
//////////
// Eta function: eta(x,y) == log(x*y) - log(x) - log(y).
+// This function is closely related to the unwinding number K, sometimes found
+// in modern literature: K(z) == (z-log(exp(z)))/(2*Pi*I).
//////////
static ex eta_evalf(const ex &x, const ex &y)