Mircea Andrasiu

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A classical cryptosystem and a public-key cryptosystem are proposed, based on the passing from a string of production labels (embedding in some way the message to be encrypted) to the string generated by the grammar by a (leftmost) derivation with that given control word (thus obtaining the cyphertext). Some problems of formal language theory appearing in(More)
The measure of the influence of an observation on a statistical estimator is the φ-divergence. We present a comparative computational study of the estimators of the φ-divergence, Monte-Carlo and bootstrap estimators, used for detection of the outliers data. We also give estimators for the prediction density of the Random Coefficient Autoregressive (RCA)(More)
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