--- scheme-data.texi.~1.30.~	2003-05-24 09:49:12.000000000 +1000
+++ scheme-data.texi	2003-06-06 11:48:39.000000000 +1000
@@ -1014,21 +1014,9 @@
 Return the hyperbolic arctangent of @var{x}.
 @end deffn
 
-For the hyperbolic arc-functions, the Guile library exports C functions
-corresponding to these Scheme procedures, but taking and returning
-arguments of type @code{double} rather than the usual @code{SCM}.
-
address@hidden {C Function} double scm_asinh (double x)
address@hidden {C Function} double scm_acosh (double x)
address@hidden {C Function} double scm_atanh (double x)
-Return the hyperbolic arcsine, arccosine or arctangent of @var{x}
-respectively.
address@hidden deftypefn
-
-For all the other Scheme procedures above, except @code{expt} and
address@hidden (whose entries specifically mention an equivalent C
-function), the equivalent C functions are those provided by the standard
-mathematics library.  The mapping is as follows.
+C functions for the above are provided by the standard mathematics
+library.  Naturally these expect and return @code{double} arguments
+(@pxref{Mathematics,,, libc, GNU C Library Reference Manual}).
 
 @multitable {xx} {Scheme Procedure} {C Function}
 @item @tab Scheme Procedure @tab C Function
@@ -1041,15 +1029,28 @@
 @item @tab @code{$asin}     @tab @code{asin}
 @item @tab @code{$acos}     @tab @code{acos}
 @item @tab @code{$atan}     @tab @code{atan}
address@hidden @tab @code{$atan2}    @tab @code{atan2}
 @item @tab @code{$exp}      @tab @code{exp}
address@hidden @tab @code{$expt}     @tab @code{pow}
 @item @tab @code{$log}      @tab @code{log}
 @item @tab @code{$sinh}     @tab @code{sinh}
 @item @tab @code{$cosh}     @tab @code{cosh}
 @item @tab @code{$tanh}     @tab @code{tanh}
address@hidden @tab @code{$asinh}    @tab @code{asinh}
address@hidden @tab @code{$acosh}    @tab @code{acosh}
address@hidden @tab @code{$atanh}    @tab @code{atanh}
 @end multitable
 
address@hidden
-Naturally, these C functions expect and return @code{double} arguments.
address@hidden, @code{acosh} and @code{atanh} are C99 standard but might
+not be present on older systems.  Guile provides the following
+equivalents (on all systems).
+
address@hidden {C Function} double scm_asinh (double x)
address@hidden {C Function} double scm_acosh (double x)
address@hidden {C Function} double scm_atanh (double x)
+Return the hyperbolic arcsine, arccosine or arctangent of @var{x}
+respectively.
address@hidden deftypefn
 
 
 @node Bitwise Operations