Our purpose here is to show how it is possible to recover the structure of a randomly permuted concatenated code, and how to use this information for decoding. This result prohibits the use of rst order concatenated codes in public-key cryp-tosystems based on error-correcting codes. R esum e Nous montrons ici comment il est possible de reconstituer la structure d'un code concat en e permut e al...

This paper estimates the speed of the adjustment coefficient in structural error correction models (ECM) and employs a system method for real exchange rates with Hansen and Sargent’s (1980, 1982) IV methods. Empirical results show that the half-lives of purchasing power parity deviations are less than one year in most cases. JEL classification: C22, F31, F41

Construction X is known from the theory of classical error control codes. We present a variant of this construction that produces stabilizer quantum error control codes from arbitrary linear codes. Our construction does not require the classical linear code that is used as an ingredient to satisfy the dual containment condition. We prove lower bounds on the minimum distance of quantum codes obt...

A nonlinear smooth transition regression (STR) model of the demand for narrow money in Colombia is specified using monthly data for cash, prices, the scale variable (industrial GDP), the interest rate and the rate of depreciation, within the single equation framework allowed by the data. In comparison with the linear error correction model, the nonlinear specification is highly superior accordi...

he main aim of this paper is to give some essential background to the theory of Reed Solomon codes and the previous survey literature of the Reed Solomon error correction method using various algorithm.Reed Solomon codes have shown to be the best compromise between efficiency and complexity. These are cyclic codes and are used for the detection and correction of burst errors. Galois field is us...