Update README.txt

README.txt

@@ -4,7 +4,7 @@ The code implements algorithms for the calculation of the Expected Force metric
 It contains:
 **original serial implementation (exffunction.cpp copyright Glenn Lawyer, 2013.)
 **OpenMP implementation.
-**CUDA GPU implementation (see the code in the directory ``parallel`` )
+**CUDA GPU implementation (our efficient algorithm, see the code in the directory ``parallel`` )
 
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