5 files changed, 65 insertions, 4 deletions
diff --git a/Doc/Makefile.in b/Doc/Makefile.in
index 6c6367526..d7673d0a1 100644
--- a/Doc/Makefile.in
+++ b/Doc/Makefile.in
@@ -59,7 +59,7 @@ Zsh/index.yo Zsh/intro.yo Zsh/invoke.yo Zsh/jobs.yo Zsh/metafaq.yo \
 Zsh/modules.yo Zsh/mod_cap.yo \
 Zsh/mod_clone.yo Zsh/mod_comp1.yo Zsh/mod_compctl.yo Zsh/mod_complist.yo \
 Zsh/mod_deltochar.yo Zsh/mod_example.yo Zsh/mod_files.yo \
-Zsh/mod_mapfile.yo Zsh/mod_parameter.yo Zsh/mod_sched.yo \
+Zsh/mod_mapfile.yo Zsh/mod_mathfunc.yo Zsh/mod_parameter.yo Zsh/mod_sched.yo \
 Zsh/mod_stat.yo Zsh/mod_zftp.yo Zsh/mod_zle.yo Zsh/options.yo \
 Zsh/params.yo Zsh/prompt.yo Zsh/redirect.yo Zsh/restricted.yo \
 Zsh/seealso.yo Zsh/zftpsys.yo Zsh/zle.yo
@@ -135,8 +135,8 @@ zshmisc.1: Zsh/grammar.yo Zsh/redirect.yo Zsh/exec.yo Zsh/func.yo \
 zshmodules.1: Zsh/modules.yo Zsh/mod_cap.yo Zsh/mod_clone.yo \
               Zsh/mod_comp1.yo Zsh/mod_complist.yo Zsh/mod_compctl.yo \
               Zsh/mod_deltochar.yo Zsh/mod_example.yo Zsh/mod_files.yo \
-              Zsh/mod_mapfile.yo Zsh/mod_sched.yo Zsh/mod_stat.yo \
-              Zsh/mod_zftp.yo Zsh/mod_zle.yo
+              Zsh/mod_mapfile.yo Zsh/mod_mathfunc.yo Zsh/mod_sched.yo \
+              Zsh/mod_stat.yo Zsh/mod_zftp.yo Zsh/mod_zle.yo
 
 zshoptions.1: Zsh/options.yo
 
diff --git a/Doc/Zsh/guide.yo b/Doc/Zsh/guide.yo
index cc8fe0f7d..c9f97fad9 100644
--- a/Doc/Zsh/guide.yo
+++ b/Doc/Zsh/guide.yo
@@ -119,9 +119,13 @@ menu(The cap Module)
 menu(The clone Module)
 menu(The comp1 Module)
 menu(The compctl Module)
+menu(The complist Module)
 menu(The deltochar Module)
 menu(The example Module)
 menu(The files Module)
+menu(The mapfile Module)
+menu(The mathfunc Module)
+menu(The parameter Module)
 menu(The sched Module)
 menu(The stat Module)
 menu(The zftp Module)
diff --git a/Doc/Zsh/mod_mapfile.yo b/Doc/Zsh/mod_mapfile.yo
index e6c388823..ad8497027 100644
--- a/Doc/Zsh/mod_mapfile.yo
+++ b/Doc/Zsh/mod_mapfile.yo
@@ -1,4 +1,4 @@
-texinode(The mapfile Module)(The parameter Module)(The files Module)(Zsh Modules)
+texinode(The mapfile Module)(The mathfunc Module)(The files Module)(Zsh Modules)
 sect(The mapfile Module)
 cindex(parameter, file access via)
 The tt(mapfile) module provides one special associative array parameter of
diff --git a/Doc/Zsh/mod_mathfunc.yo b/Doc/Zsh/mod_mathfunc.yo
new file mode 100644
index 000000000..bc69d2b20
--- /dev/null
+++ b/Doc/Zsh/mod_mathfunc.yo
@@ -0,0 +1,52 @@
+texinode(The mathfunc Module)(The parameter Module)(The mapfile Module)(Zsh Modules)
+sect(The mathfunc Module)
+cindex(functions, mathematical)
+cindex(mathematical functions)
+The tt(mathfunc) module provides standard mathematical functions for use when
+evaluating mathematical formulae.  The syntax agrees with normal C and
+FORTRAN conventions, for example,
+
+example((( f = sin(0.3) )))
+
+assigns the sine of 0.3 to the parameter f.
+
+Most functions take floating point arguments and return a floating point
+value.  However, any necessary conversions from or to integer type will be
+performed automatically by the shell.  Apart from tt(atan) with a second
+argument and the tt(abs), tt(int) and tt(float) functions, all functions
+behave as noted in the manual page for the corresponding C function,
+except that any arguments out of range for the function in question will be
+detected by the shell and an error reported.
+
+The following functions take a single floating point argument: tt(acos),
+tt(acosh), tt(asin), tt(asinh), tt(atan), tt(atanh), tt(cbrt), tt(ceil),
+tt(cos), tt(cosh), tt(erf), tt(erfc), tt(exp), tt(expm1), tt(fabs),
+tt(floor), tt(gamma), tt(j0), tt(j1), tt(lgamma), tt(log), tt(log10),
+tt(log1p), tt(logb), tt(sin), tt(sinh), tt(sqrt), tt(tan), tt(tanh),
+tt(y0), tt(y1).  The tt(atan) function can optionally take a second
+argument, in which case it behaves like the C function tt(atan2).
+The tt(ilogb) function takes a single floating point argument, but
+returns an integer.
+
+The function tt(signgam) takes no arguments, and returns an integer, which
+is the C variable of the same name, as described in manref(gamma)(3).  Note
+that it is therefore only useful immediately after a call to tt(gamma) or
+tt(lgamma).  Note also that `tt(signgam())' and `tt(signgam)' are distinct
+expresssions.
+
+The following functions take two floating point arguments: tt(copysign),
+tt(drem), tt(fmod), tt(hypot), tt(nextafter).
+
+The following take an integer first argument and a floating point second
+argument: tt(jn), tt(yn).
+
+The following take a floating point first argument and an integer second
+argument: tt(ldexp), tt(scalb).
+
+The function tt(abs) does not convert the type of its single argument; it
+returns the absolute value of either a floating point number or an
+integer.  The functions tt(float) and tt(int) convert their arguments into
+a floating point or integer value (by truncation) respectively.
+
+Note that the C tt(pow) function is available in ordinary math evaluation
+as the `tt(**)' operator and is not provided here.
diff --git a/Doc/Zsh/modules.yo b/Doc/Zsh/modules.yo
index 12066b773..3f443b073 100644
--- a/Doc/Zsh/modules.yo
+++ b/Doc/Zsh/modules.yo
@@ -37,6 +37,9 @@ Some basic file manipulation commands as builtins.
 item(tt(mapfile))(
 Access to external files via a special associative array.
 )
+item(tt(mathfunc))(
+Standard scientific functions for use in mathematical evaluations.
+)
 item(tt(parameter))(
 Access to internal hash tables via special associative arrays.
 )
@@ -63,6 +66,7 @@ menu(The deltochar Module)
 menu(The example Module)
 menu(The files Module)
 menu(The mapfile Module)
+menu(The mathfunc Module)
 menu(The parameter Module)
 menu(The sched Module)
 menu(The stat Module)
@@ -78,6 +82,7 @@ includefile(Zsh/mod_deltochar.yo)
 includefile(Zsh/mod_example.yo)
 includefile(Zsh/mod_files.yo)
 includefile(Zsh/mod_mapfile.yo)
+includefile(Zsh/mod_mathfunc.yo)
 includefile(Zsh/mod_parameter.yo)
 includefile(Zsh/mod_sched.yo)
 includefile(Zsh/mod_stat.yo)