diff --git a/man3/acos.3 b/man3/acos.3
index 40ebe7797..877fc35c2 100644
--- a/man3/acos.3
+++ b/man3/acos.3
@@ -63,9 +63,7 @@ or
 .RE
 .ad b
 .SH DESCRIPTION
-The
-.BR acos ()
-function calculates the arc cosine of
+These functions calculate the arc cosine of
 .IR x ;
 that is
 the value whose cosine is
diff --git a/man3/acosh.3 b/man3/acosh.3
index 7a0c40e75..679810e41 100644
--- a/man3/acosh.3
+++ b/man3/acosh.3
@@ -75,9 +75,7 @@ or
 .RE
 .ad b
 .SH DESCRIPTION
-The
-.BR acosh ()
-function calculates the inverse hyperbolic cosine of
+These functions calculate the inverse hyperbolic cosine of
 .IR x ;
 that is the value whose hyperbolic cosine is
 .IR x .
diff --git a/man3/asin.3 b/man3/asin.3
index 9605bd208..890456de2 100644
--- a/man3/asin.3
+++ b/man3/asin.3
@@ -65,9 +65,7 @@ or
 .RE
 .ad b
 .SH DESCRIPTION
-The
-.BR asin ()
-function calculates the principal value of the arc sine of
+These functions calculate the principal value of the arc sine of
 .IR x ;
 that is the value whose sine is
 .IR x .
diff --git a/man3/asinh.3 b/man3/asinh.3
index 20012e429..932d21c3e 100644
--- a/man3/asinh.3
+++ b/man3/asinh.3
@@ -75,9 +75,7 @@ or
 .RE
 .ad b
 .SH DESCRIPTION
-The
-.BR asinh ()
-function calculates the inverse hyperbolic sine of
+These functions calculate the inverse hyperbolic sine of
 .IR x ;
 that is the value whose hyperbolic sine is
 .IR x .
diff --git a/man3/atan.3 b/man3/atan.3
index ef2bdc4e8..8ba043901 100644
--- a/man3/atan.3
+++ b/man3/atan.3
@@ -65,9 +65,7 @@ or
 .RE
 .ad b
 .SH DESCRIPTION
-The
-.BR atan ()
-function calculates the principal value of the arc tangent of
+These functions calculate the principal value of the arc tangent of
 .IR x ;
 that is the value whose tangent is
 .IR x .
diff --git a/man3/atan2.3 b/man3/atan2.3
index 38cc49f15..8ecd5f656 100644
--- a/man3/atan2.3
+++ b/man3/atan2.3
@@ -63,9 +63,7 @@ or
 .RE
 .ad b
 .SH DESCRIPTION
-The
-.BR atan2 ()
-function calculates the principal value of the arc tangent of
+These functions calculate the principal value of the arc tangent of
 .IR y/x ,
 using the signs of the two arguments to determine
 the quadrant of the result.
diff --git a/man3/atanh.3 b/man3/atanh.3
index a7bc3cec5..673f012a3 100644
--- a/man3/atanh.3
+++ b/man3/atanh.3
@@ -75,9 +75,7 @@ or
 .RE
 .ad b
 .SH DESCRIPTION
-The
-.BR atanh ()
-function calculates the inverse hyperbolic tangent of
+These functions calculate the inverse hyperbolic tangent of
 .IR x ;
 that is the value whose hyperbolic tangent is
 .IR x .
diff --git a/man3/cabs.3 b/man3/cabs.3
index 699b5eb0c..44cf31af3 100644
--- a/man3/cabs.3
+++ b/man3/cabs.3
@@ -18,9 +18,7 @@ cabs, cabsf, cabsl \- absolute value of a complex number
 .sp
 Link with \fI\-lm\fP.
 .SH DESCRIPTION
-The
-.BR cabs ()
-function returns the absolute value of the complex number
+These functions return the absolute value of the complex number
 .IR z .
 The result is a real number.
 .SH VERSIONS
diff --git a/man3/cacos.3 b/man3/cacos.3
index 94277e21d..6c7b0e2dd 100644
--- a/man3/cacos.3
+++ b/man3/cacos.3
@@ -19,9 +19,7 @@ cacos, cacosf, cacosl \- complex arc cosine
 .sp
 Link with \fI\-lm\fP.
 .SH DESCRIPTION
-The
-.BR cacos ()
-function calculates the complex arc cosine of
+These functions calculate the complex arc cosine of
 .IR z .
 If \fIy\ =\ cacos(z)\fP, then \fIz\ =\ ccos(y)\fP.
 The real part of
diff --git a/man3/cacosh.3 b/man3/cacosh.3
index fa677e5b2..f27364ce6 100644
--- a/man3/cacosh.3
+++ b/man3/cacosh.3
@@ -19,9 +19,7 @@ cacosh, cacoshf, cacoshl \- complex arc hyperbolic cosine
 .sp
 Link with \fI\-lm\fP.
 .SH DESCRIPTION
-The
-.BR cacosh ()
-function calculates the complex arc hyperbolic cosine of
+These functions calculate the complex arc hyperbolic cosine of
 .IR z .
 If \fIy\ =\ cacosh(z)\fP, then \fIz\ =\ ccosh(y)\fP.
 The imaginary part of
diff --git a/man3/casin.3 b/man3/casin.3
index 4c4473b79..294a874f0 100644
--- a/man3/casin.3
+++ b/man3/casin.3
@@ -18,9 +18,7 @@ casin, casinf, casinl \- complex arc sine
 .sp
 Link with \fI\-lm\fP.
 .SH DESCRIPTION
-The
-.BR casin ()
-function calculates the complex arc sine of
+These functions calculate the complex arc sine of
 .IR z .
 If \fIy\ =\ casin(z)\fP, then \fIz\ =\ csin(y)\fP.
 The real part of
diff --git a/man3/casinh.3 b/man3/casinh.3
index e33201214..70b4441bc 100644
--- a/man3/casinh.3
+++ b/man3/casinh.3
@@ -18,9 +18,7 @@ casinh, casinhf, casinhl \- complex arc sine hyperbolic
 .sp
 Link with \fI\-lm\fP.
 .SH DESCRIPTION
-The
-.BR casinh ()
-function calculates the complex arc hyperbolic sine of
+These functions calculate the complex arc hyperbolic sine of
 .IR z .
 If \fIy\ =\ casinh(z)\fP, then \fIz\ =\ csinh(y)\fP.
 The imaginary part of
diff --git a/man3/catan.3 b/man3/catan.3
index d7d3c59d3..4725ab5f7 100644
--- a/man3/catan.3
+++ b/man3/catan.3
@@ -19,9 +19,7 @@ catan, catanf, catanl \- complex arc tangents
 .sp
 Link with \fI\-lm\fP.
 .SH DESCRIPTION
-The
-.BR catan ()
-function calculates the complex arc tangent of
+These functions calculate the complex arc tangent of
 .IR z .
 If \fIy\ =\ catan(z)\fP, then \fIz\ =\ ctan(y)\fP.
 The real part of y is chosen in the interval [\-pi/2,pi/2].
diff --git a/man3/catanh.3 b/man3/catanh.3
index ca0ee431a..c5417c057 100644
--- a/man3/catanh.3
+++ b/man3/catanh.3
@@ -19,9 +19,7 @@ catanh, catanhf, catanhl \- complex arc tangents hyperbolic
 .sp
 Link with \fI\-lm\fP.
 .SH DESCRIPTION
-The
-.BR catanh ()
-function calculates the complex arc hyperbolic tangent of
+These functions calculate the complex arc hyperbolic tangent of
 .IR z .
 If \fIy\ =\ catanh(z)\fP, then \fIz\ =\ ctanh(y)\fP.
 The imaginary part of
diff --git a/man3/cbrt.3 b/man3/cbrt.3
index 9a18660d1..76aa87248 100644
--- a/man3/cbrt.3
+++ b/man3/cbrt.3
@@ -70,9 +70,7 @@ or
 .RE
 .ad b
 .SH DESCRIPTION
-The
-.BR cbrt ()
-function returns the (real) cube root of
+These functions return the (real) cube root of
 .IR x .
 This function cannot fail; every representable real value has a
 representable real cube root.
diff --git a/man3/cexp.3 b/man3/cexp.3
index 4e7597bf2..ce26da96d 100644
--- a/man3/cexp.3
+++ b/man3/cexp.3
@@ -18,7 +18,7 @@ cexp, cexpf, cexpl \- complex exponential function
 .sp
 Link with \fI\-lm\fP.
 .SH DESCRIPTION
-The function calculates e (2.71828..., the base of natural logarithms)
+These functions calculate e (2.71828..., the base of natural logarithms)
 raised to the power of
 .IR z .
 .LP
diff --git a/man3/cimag.3 b/man3/cimag.3
index 2b58d965e..e0d4f26e0 100644
--- a/man3/cimag.3
+++ b/man3/cimag.3
@@ -18,9 +18,7 @@ cimag, cimagf, cimagl \- get imaginary part of a complex number
 .sp
 Link with \fI\-lm\fP.
 .SH DESCRIPTION
-The
-.BR cimag ()
-function returns the imaginary part of the complex number
+These functions return the imaginary part of the complex number
 .IR z .
 .LP
 One has:
diff --git a/man3/conj.3 b/man3/conj.3
index 07c368334..4d4ad81ef 100644
--- a/man3/conj.3
+++ b/man3/conj.3
@@ -18,9 +18,7 @@ conj, conjf, conjl \- calculate the complex conjugate
 .sp
 Link with \fI\-lm\fP.
 .SH DESCRIPTION
-The
-.BR conj ()
-function returns the complex conjugate value of
+These functions return the complex conjugate value of
 .IR z .
 That is the value obtained by changing the sign of the imaginary part.
 .LP
diff --git a/man3/copysign.3 b/man3/copysign.3
index 5456c198f..ce400b989 100644
--- a/man3/copysign.3
+++ b/man3/copysign.3
@@ -62,13 +62,7 @@ or
 .RE
 .ad b
 .SH DESCRIPTION
-The
-.BR copysign (),
-.BR copysignf (),
-and
-.BR copysignl ()
-functions return a value whose absolute value matches
-that of
+These functions return a value whose absolute value matches that of
 .IR x ,
 but whose sign bit matches that of
 .IR y .
diff --git a/man3/cos.3 b/man3/cos.3
index f0c0a3939..65f41dda9 100644
--- a/man3/cos.3
+++ b/man3/cos.3
@@ -64,9 +64,7 @@ or
 .RE
 .ad
 .SH DESCRIPTION
-The
-.BR cos ()
-function returns the cosine of
+These functions return the cosine of
 .IR x ,
 where
 .I x
diff --git a/man3/cosh.3 b/man3/cosh.3
index 2cf4c8933..b5800e149 100644
--- a/man3/cosh.3
+++ b/man3/cosh.3
@@ -66,12 +66,9 @@ or
 .RE
 .ad
 .SH DESCRIPTION
-The
-.BR cosh ()
-function returns the hyperbolic cosine of
+These functions return the hyperbolic cosine of
 .IR x ,
-which
-is defined mathematically as:
+which is defined mathematically as:
 .nf
 
     cosh(x) = (exp(x) + exp(\-x)) / 2
diff --git a/man3/cpow.3 b/man3/cpow.3
index b9aa88d92..e84c3017c 100644
--- a/man3/cpow.3
+++ b/man3/cpow.3
@@ -21,11 +21,11 @@ cpow, cpowf, cpowl \- complex power function
 Link with \fI\-lm\fP.
 .fi
 .SH DESCRIPTION
-The function calculates
+These functions calculate
 .I x
 raised to the power
-.IR z .
-(With a branch cut for
+.IR z
+(with a branch cut for
 .I x
 along the negative real axis.)
 .SH VERSIONS
diff --git a/man3/creal.3 b/man3/creal.3
index 2fe5f561e..8681a708b 100644
--- a/man3/creal.3
+++ b/man3/creal.3
@@ -18,9 +18,7 @@ creal, crealf, creall \- get real part of a complex number
 .sp
 Link with \fI\-lm\fP.
 .SH DESCRIPTION
-The
-.BR creal ()
-function returns the real part of the complex number
+These functions return the real part of the complex number
 .IR z .
 .LP
 One has:
diff --git a/man3/erf.3 b/man3/erf.3
index 862ab4d13..d573bb0cf 100644
--- a/man3/erf.3
+++ b/man3/erf.3
@@ -72,12 +72,9 @@ or
 .RE
 .ad b
 .SH DESCRIPTION
-The
-.BR erf ()
-function returns the error function of
+These functions return the error function of
 .IR x ,
-defined
-as
+defined as
 .TP
     erf(x) = 2/sqrt(pi)* integral from 0 to x of exp(\-t*t) dt
 .SH RETURN VALUE
diff --git a/man3/erfc.3 b/man3/erfc.3
index 08810c2b1..a3382f9fc 100644
--- a/man3/erfc.3
+++ b/man3/erfc.3
@@ -63,9 +63,7 @@ or
 .RE
 .ad b
 .SH DESCRIPTION
-The
-.BR erfc ()
-function returns the complementary error function of
+These functions return the complementary error function of
 .IR x ,
 that is, 1.0 \- erf(x).
 .SH RETURN VALUE
diff --git a/man3/exp.3 b/man3/exp.3
index ad6c356f6..ca6defb28 100644
--- a/man3/exp.3
+++ b/man3/exp.3
@@ -66,9 +66,7 @@ or
 .RE
 .ad b
 .SH DESCRIPTION
-The
-.BR exp ()
-function returns the value of e (the base of natural
+These functions return the value of e (the base of natural
 logarithms) raised to the power of
 .IR x .
 .SH RETURN VALUE
diff --git a/man3/exp10.3 b/man3/exp10.3
index a48ed3e38..63aa22905 100644
--- a/man3/exp10.3
+++ b/man3/exp10.3
@@ -50,9 +50,7 @@ exp10, exp10f, exp10l \- base-10 exponential function
 .sp
 Link with \fI\-lm\fP.
 .SH DESCRIPTION
-The
-.BR exp10 ()
-function returns the value of 10
+These functions return the value of 10
 raised to the power of
 .IR x .
 .SH RETURN VALUE
diff --git a/man3/exp2.3 b/man3/exp2.3
index cf9546f7a..9f912b3a8 100644
--- a/man3/exp2.3
+++ b/man3/exp2.3
@@ -66,10 +66,7 @@ or
 .RE
 .ad b
 .SH DESCRIPTION
-The
-.BR exp2 ()
-function returns the value of 2
-raised to the power of
+These functions return the value of 2 raised to the power of
 .IR x .
 .SH RETURN VALUE
 On success, these functions return the base-2 exponential value of
diff --git a/man3/expm1.3 b/man3/expm1.3
index 2319c88d2..1bc68aabf 100644
--- a/man3/expm1.3
+++ b/man3/expm1.3
@@ -70,15 +70,13 @@ or
 .RE
 .ad b
 .SH DESCRIPTION
-.I expm1(x)
-returns a value equivalent to
+These functions return a value equivalent to
 .nf
 
     exp(x) \- 1
 
 .fi
-It is
-computed in a way that is accurate even if the value of
+The result is computed in a way that is accurate even if the value of
 .I x
 is near
 zero\(ema case where
diff --git a/man3/fma.3 b/man3/fma.3
index 23c0c89f3..3bd00299c 100644
--- a/man3/fma.3
+++ b/man3/fma.3
@@ -43,9 +43,7 @@ or
 .RE
 .ad
 .SH DESCRIPTION
-The
-.BR fma ()
-function computes
+These functions compute
 .IR x " * " y " + " z .
 The result is rounded as one ternary operation according to the
 current rounding mode (see
diff --git a/man3/fmod.3 b/man3/fmod.3
index c70675245..700a1eedf 100644
--- a/man3/fmod.3
+++ b/man3/fmod.3
@@ -65,9 +65,7 @@ or
 .RE
 .ad
 .SH DESCRIPTION
-The
-.BR fmod ()
-function computes the floating-point remainder of dividing
+These functions compute the floating-point remainder of dividing
 .I x
 by
 .IR y .
diff --git a/man3/frexp.3 b/man3/frexp.3
index 559e968b7..d126d8532 100644
--- a/man3/frexp.3
+++ b/man3/frexp.3
@@ -64,17 +64,13 @@ or
 .RE
 .ad
 .SH DESCRIPTION
-The
-.BR frexp ()
-function is used to split the number
+These functions are used to split the number
 .I x
 into a
 normalized fraction and an exponent which is stored in
 .IR exp .
 .SH RETURN VALUE
-The
-.BR frexp ()
-function returns the normalized fraction.
+These functions return the normalized fraction.
 If the argument
 .I x
 is not zero,
diff --git a/man3/hypot.3 b/man3/hypot.3
index 1392f4adb..1e5221a9e 100644
--- a/man3/hypot.3
+++ b/man3/hypot.3
@@ -72,9 +72,7 @@ or
 .RE
 .ad b
 .SH DESCRIPTION
-The
-.BR hypot ()
-function returns
+These functions return
 .RI sqrt( x * x + y * y ).
 This is the length of the hypotenuse of a right-angled triangle
 with sides of length
diff --git a/man3/ldexp.3 b/man3/ldexp.3
index 3926b59f6..1e22fec79 100644
--- a/man3/ldexp.3
+++ b/man3/ldexp.3
@@ -64,9 +64,7 @@ or
 .RE
 .ad
 .SH DESCRIPTION
-The
-.BR ldexp ()
-function returns the result of multiplying the floating-point number
+These functions return the result of multiplying the floating-point number
 .I x
 by 2 raised to the power
 .IR exp .
diff --git a/man3/lgamma.3 b/man3/lgamma.3
index 667f00fab..af2925f30 100644
--- a/man3/lgamma.3
+++ b/man3/lgamma.3
@@ -73,8 +73,11 @@ For the definition of the Gamma function, see
 .BR tgamma (3).
 .PP
 The
-.BR lgamma ()
-function returns the natural logarithm of
+.BR lgamma (),
+.BR lgammaf (),
+and
+.BR lgammal ()
+functions return the natural logarithm of
 the absolute value of the Gamma function.
 The sign of the Gamma function is returned in the
 external integer
diff --git a/man3/log.3 b/man3/log.3
index c2761aabd..6ae17d263 100644
--- a/man3/log.3
+++ b/man3/log.3
@@ -66,9 +66,7 @@ or
 .RE
 .ad
 .SH DESCRIPTION
-The
-.BR log ()
-function returns the natural logarithm of
+These functions return the natural logarithm of
 .IR x .
 .SH RETURN VALUE
 On success, these functions return the natural logarithm of
diff --git a/man3/log10.3 b/man3/log10.3
index abf48e58c..c096a9f04 100644
--- a/man3/log10.3
+++ b/man3/log10.3
@@ -66,9 +66,7 @@ or
 .RE
 .ad
 .SH DESCRIPTION
-The
-.BR log10 ()
-function returns the base 10 logarithm of
+These functions return the base 10 logarithm of
 .IR x .
 .SH RETURN VALUE
 On success, these functions return the base 10 logarithm of
diff --git a/man3/log1p.3 b/man3/log1p.3
index 0a93d17ff..0889e5746 100644
--- a/man3/log1p.3
+++ b/man3/log1p.3
@@ -69,14 +69,13 @@ or
 .RE
 .ad b
 .SH DESCRIPTION
-.I log1p(x)
-returns a value equivalent to
+These functions return a value equivalent to
 .nf
 
     log (1 + \fIx\fP)
 
 .fi
-It is computed in a way
+The result is computed in a way
 that is accurate even if the value of
 .I x
 is near zero.
diff --git a/man3/log2.3 b/man3/log2.3
index c2d574622..e0f9f8a7f 100644
--- a/man3/log2.3
+++ b/man3/log2.3
@@ -66,9 +66,7 @@ or
 .RE
 .ad b
 .SH DESCRIPTION
-The
-.BR log2 ()
-function returns the base 2 logarithm of
+These functions return the base 2 logarithm of
 .IR x .
 .SH RETURN VALUE
 On success, these functions return the base 2 logarithm of
diff --git a/man3/modf.3 b/man3/modf.3
index a8e8c9973..62155e77d 100644
--- a/man3/modf.3
+++ b/man3/modf.3
@@ -64,9 +64,7 @@ or
 .RE
 .ad
 .SH DESCRIPTION
-The
-.BR modf ()
-function breaks the argument
+These functions break the argument
 .I x
 into an integral
 part and a fractional part, each of which has the same sign as
@@ -74,9 +72,7 @@ part and a fractional part, each of which has the same sign as
 The integral part is stored in the location pointed to by
 .IR iptr .
 .SH RETURN VALUE
-The
-.BR modf ()
-function returns the fractional part of
+These functions return the fractional part of
 .IR x .
 
 If
diff --git a/man3/pow.3 b/man3/pow.3
index 1e5ba5d5d..3fc8ccf12 100644
--- a/man3/pow.3
+++ b/man3/pow.3
@@ -65,9 +65,7 @@ or
 .RE
 .ad
 .SH DESCRIPTION
-The
-.BR pow ()
-function returns the value of
+These functions return the value of
 .I x
 raised to the
 power of
diff --git a/man3/pow10.3 b/man3/pow10.3
index d0c3e704f..355b77e34 100644
--- a/man3/pow10.3
+++ b/man3/pow10.3
@@ -39,10 +39,7 @@ pow10, pow10f, pow10l \- base-10 power functions
 .sp
 Link with \fI\-lm\fP.
 .SH DESCRIPTION
-The
-.BR pow10 ()
-function returns the value of 10 raised to the
-power
+These functions return the value of 10 raised to the power
 .IR x .
 .SH VERSIONS
 These functions first appeared in glibc in version 2.1.
diff --git a/man3/remainder.3 b/man3/remainder.3
index f46851afa..49c4214ec 100644
--- a/man3/remainder.3
+++ b/man3/remainder.3
@@ -90,9 +90,8 @@ _SVID_SOURCE || _BSD_SOURCE
 .RE
 .ad b
 .SH DESCRIPTION
-The
-.BR remainder ()
-function computes the remainder of dividing
+These
+functions compute the remainder of dividing
 .I x
 by
 .IR y .
diff --git a/man3/significand.3 b/man3/significand.3
index 2f6aa882f..ae7ab03cb 100644
--- a/man3/significand.3
+++ b/man3/significand.3
@@ -35,12 +35,10 @@ _SVID_SOURCE || _BSD_SOURCE
 .RE
 .ad b
 .SH DESCRIPTION
-The
-.BR significand ()
-function returns the mantissa of
+These functions return the mantissa of
 .I x
 scaled to the range [1,2).
-It is equivalent to
+They are equivalent to
 .sp
 .in +4n
 scalb(x, (double) \-ilogb(x))
diff --git a/man3/sin.3 b/man3/sin.3
index b44879497..cff26e9c7 100644
--- a/man3/sin.3
+++ b/man3/sin.3
@@ -65,9 +65,7 @@ or
 .RE
 .ad
 .SH DESCRIPTION
-The
-.BR sin ()
-function returns the sine of
+These functions return the sine of
 .IR x ,
 where
 .I x
diff --git a/man3/sinh.3 b/man3/sinh.3
index 346c09d08..3648c4bd8 100644
--- a/man3/sinh.3
+++ b/man3/sinh.3
@@ -66,9 +66,7 @@ or
 .RE
 .ad
 .SH DESCRIPTION
-The
-.BR sinh ()
-function returns the hyperbolic sine of
+These functions return the hyperbolic sine of
 .IR x ,
 which
 is defined mathematically as:
diff --git a/man3/sqrt.3 b/man3/sqrt.3
index 96697b6aa..40fee56cb 100644
--- a/man3/sqrt.3
+++ b/man3/sqrt.3
@@ -64,9 +64,7 @@ or
 .RE
 .ad
 .SH DESCRIPTION
-The
-.BR sqrt ()
-function returns the nonnegative square root of
+These functions return the nonnegative square root of
 .IR x .
 .SH RETURN VALUE
 On success, these functions return the square root of
diff --git a/man3/tan.3 b/man3/tan.3
index 1ccd0413c..ad44cf4ec 100644
--- a/man3/tan.3
+++ b/man3/tan.3
@@ -65,9 +65,7 @@ or
 .RE
 .ad
 .SH DESCRIPTION
-The
-.BR tan ()
-function returns the tangent of
+These functions return the tangent of
 .IR x ,
 where
 .I x
diff --git a/man3/tanh.3 b/man3/tanh.3
index 982af39cb..f86de0232 100644
--- a/man3/tanh.3
+++ b/man3/tanh.3
@@ -65,9 +65,7 @@ or
 .RE
 .ad
 .SH DESCRIPTION
-The
-.BR tanh ()
-function returns the hyperbolic tangent of
+These functions return the hyperbolic tangent of
 .IR x ,
 which
 is defined mathematically as:
diff --git a/man3/tgamma.3 b/man3/tgamma.3
index 233f62d72..1bd04e7ae 100644
--- a/man3/tgamma.3
+++ b/man3/tgamma.3
@@ -42,6 +42,9 @@ or
 .RE
 .ad
 .SH DESCRIPTION
+These functions calculate the Gamma function of
+.IR x .
+
 The Gamma function is defined by
 .sp
     Gamma(x) = integral from 0 to infinity of t^(x\-1) e^\-t dt