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Journals and Conferences
Classical cryptosystems of the type " Richeheu " or " garbage-in-between " give rise to ideas and notions so far neglected in the theory of formal languages. This paper investigates such notions, mainly from the point of view of decidability.
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)