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#X text 12 25 LICENSE GPL v2;
#X text 12 5 KEYWORDS control analysis;
#X text 12 106 AUTHOR Olaf Matthes;
#X text 12 45 DESCRIPTION calculate 1st or 2nd order difference;
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#X text 12 127 MAINTAINER Fred Jan Kraan <fjkraan@xs4all.nl>;
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