4 files changed, 4 insertions, 4 deletions

diff --git a/math/ltl2ba/pkg-descr b/math/ltl2ba/pkg-descr
index 68a2cfafde00..55982fb67807 100644
--- a/math/ltl2ba/pkg-descr
+++ b/math/ltl2ba/pkg-descr
@@ -5,7 +5,7 @@ transforms it into a Buechi automaton, using a generalized Buechi
 automaton as an intermediate step. Each automaton is simplified
 on-the-fly in order to save memory and time. As usual the LTL formula
 is simplified before any treatment.  ltl2ba is more efficient than
-Spin 3.4.1, with regard to the the size of the resulting automaton,
+Spin 3.4.1, with regard to the size of the resulting automaton,
 the time of the computation, and the memory used.
 
 WWW:	http://www.lsv.ens-cachan.fr/~gastin/ltl2ba/
diff --git a/math/ndiff/pkg-descr b/math/ndiff/pkg-descr
index 7b8ecb1a4af6..d7ed8a4f8791 100644
--- a/math/ndiff/pkg-descr
+++ b/math/ndiff/pkg-descr
@@ -10,7 +10,7 @@ difficult task for a human, as small differences in numerical output values
 are expected.  File differencing utilites, such as diff(1), will generally
 produce voluminous output, often longer than the original files.
 
-ndiff solves this problem. Taking two two text files expected to be
+ndiff solves this problem. Taking two text files expected to be
 identical, or at least numerically similar, it allows to specify absolute
 and/or relative error tolerances for differences between numerical values
 in the two files, and then reports only the lines with values exceeding
diff --git a/math/p5-Statistics-R/pkg-descr b/math/p5-Statistics-R/pkg-descr
index 84da1fe5076f..77db5f818f0c 100644
--- a/math/p5-Statistics-R/pkg-descr
+++ b/math/p5-Statistics-R/pkg-descr
@@ -1,4 +1,4 @@
-Statistics::R will permit the control of the the R (R-project) interpreter
+Statistics::R will permit the control of the R (R-project) interpreter
 through Perl in different architectures and OS.
 
 WWW: http://search.cpan.org/dist/Statistics-R/
diff --git a/math/prng/pkg-descr b/math/prng/pkg-descr
index 9c5ca3315057..b97ecce27473 100644
--- a/math/prng/pkg-descr
+++ b/math/prng/pkg-descr
@@ -1,6 +1,6 @@
 PRNG is a collection of portable, high-performance ANSI-C implementations of
 pseudorandom number generators such as linear congruential, inversive
 congruential, and explicit inversive congruential random number generators (LCG,
-ICG and EICG, respectively) created by Otmar Lendl and and Josef Leydold.
+ICG and EICG, respectively) created by Otmar Lendl and Josef Leydold.
 
 WWW: http://statistik.wu-wien.ac.at/software/prng/index.html