diff --git a/src/maths/cmaths/cmath1.c b/src/maths/cmaths/cmath1.c
index 416c934a6..0b43901cd 100644
--- a/src/maths/cmaths/cmath1.c
+++ b/src/maths/cmaths/cmath1.c
@@ -4,7 +4,7 @@ Author: 1985 Wayne A. Christopher, U. C. Berkeley CAD Group
 **********/
 
 /** \file cmath1.c
-    \brief functions for the control language parser
+    \brief functions for the control language parser: mag, ph, cph, unwrap, j, real, conj, pos, db, log10, log, exp, sqrt, sin, sinh, cos, coh, tan, tanh, atan, sortorder 
 
     Routines to do complex mathematical functions. These routines require
     the -lm libraries. We sacrifice a lot of space to be able
diff --git a/src/maths/cmaths/cmath2.c b/src/maths/cmaths/cmath2.c
index e5f09f67c..3e40e370a 100644
--- a/src/maths/cmaths/cmath2.c
+++ b/src/maths/cmaths/cmath2.c
@@ -4,7 +4,7 @@ Author: 1985 Wayne A. Christopher, U. C. Berkeley CAD Group
 **********/
 
 /** \file cmath2.c
-    \brief functions for the control language parser
+    \brief functions for the control language parser: norm, uminus, rnd, sunif, sgauss, poisson, exponential, mean, stddev, length, vector, unitvec, plus, minus, times, mod, max, min, d, avg, floor, ceil, nint
 
     Routines to do complex mathematical functions. These routines require
     the -lm libraries. We sacrifice a lot of space to be able
diff --git a/src/maths/cmaths/cmath3.c b/src/maths/cmaths/cmath3.c
index d5d0f6e89..ff270a1f9 100644
--- a/src/maths/cmaths/cmath3.c
+++ b/src/maths/cmaths/cmath3.c
@@ -4,7 +4,7 @@ Author: 1985 Wayne A. Christopher, U. C. Berkeley CAD Group
 **********/
 
 /** \file cmath3.c
-    \brief functions for the control language parser
+    \brief functions for the control language parser: divide, comma, power, eq, gt, lt, ge, le, ne
 
     Routines to do complex mathematical functions. These routines require
     the -lm libraries. We sacrifice a lot of space to be able
diff --git a/src/maths/cmaths/cmath4.c b/src/maths/cmaths/cmath4.c
index fb428f5f2..b3dd42f9a 100644
--- a/src/maths/cmaths/cmath4.c
+++ b/src/maths/cmaths/cmath4.c
@@ -4,7 +4,7 @@ Author: 1985 Wayne A. Christopher, U. C. Berkeley CAD Group
 **********/
 
 /** \file cmath4.c
-    \brief functions for the control language parser
+    \brief functions for the control language parser: and, or, not, interpolate, deriv, integ, group_delay, fft, ifft
 
     Routines to do complex mathematical functions. These routines require
     the -lm libraries. We sacrifice a lot of space to be able