منابع مشابه
Strong Shift Equivalence Theory and the Shift Equivalence Problem
This paper discusses strong shift equivalence and counterexamples to the long standing Shift Equivalence Problem in symbolic dynamics. We also discuss how strong shift equivalence theory is closely related to areas of mathematics outside dynamics such as algebraic K-theory, cyclic homology, and topological quantum field theory.
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Two forms of nonlinear-feedback shift-registers are considered. In the Type-I register, the feedback output is added to the shift-register contents at an arbitrary number of stages. In the type-11 register, the feedback is input to the first stage only. It is shown that for every Type-I register there is an equivalent Type-II register in the sense that the autonomous state diagrams differ only ...
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We present an algorithm which decides the shift equivalence problem for Pfinite sequences. A sequence is called P-finite if it satisfies a homogeneous linear recurrence equation with polynomial coefficients. Two sequences are called shift equivalent if shifting one of the sequences s times makes it identical to the other, for some integer s. Our algorithm computes, for any two P-finite sequence...
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The Fibonacci-to-Galois transformation is useful for reducing the propagation delay of feedback shift register-based stream ciphers and hash functions. In this paper, we extend it to handle Galois-to-Galois case as well as feedforward connections. This makes possible transforming Trivium stream cipher and increasing its keystream data rate by 27% without any penalty in area. The presented trans...
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Background and Objectives: Non-sanitary conditions during the drying, transport and storage stages in the production of spices could introduce mycotoxin contamination. The aim of the current study was to determine the concentration of ochratoxin A (OTA) in 92 commercial spices (including red pepper, black pepper, turmeric and cinnamon) imported to Iran. Materials and Methods: OTA levels were...
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ژورنال
عنوان ژورنال: Annales Polonici Mathematici
سال: 2011
ISSN: 0066-2216,1730-6272
DOI: 10.4064/ap102-1-7