منابع مشابه
A Generic Property of the Bounded Syzygy Solutions
For a set of masses having positive measure, excepting eventually a negligible set of initial conditions, every noncollinear bounded solution of the planar three-body problem that has a syzygy configuration encounters an infinity of such configurations. Along a noncollinear syzygy solution, the set of syzygy configuration instants is discrete.
متن کاملGreen’s canonical syzygy conjecture for generic curves of odd genus
The direction ⇒ is proved by Green and Lazarsfeld in the appendix to [3]. The case p = g−2 of the conjecture is equivalent to Noether’s theorem, and the case p = g−3 to Petri’s theorem (see [5]). The case p = g − 4 has been proved in any genus by Schreyer [9] and by the author [13] for g > 10. More recently, the conjecture has been studied in [11], [12], for generic curves of fixed gonality. Te...
متن کاملGeneric Attacks on Feistel Schemes
Let A be a Feistel scheme with 5 rounds from 2n bits to 2n bits. In the present paper we show that for most such schemes A: 1. It is possible to distinguish A from a random permutation from 2n bits to 2n bits after doing at most O(2n) computations with O(2n) non-adaptive chosen plaintexts. 2. It is possible to distinguish A from a random permutation from 2n bits to 2n bits after doing at most O...
متن کاملGeneric Attacks on Misty Schemes
Misty schemes are classic cryptographic schemes used to construct pseudo-random permutations from 2n bits to 2n bits by using d pseudo-random permutations from n bits to n bits. These d permutations will be called the “internal” permutations, and d is the number of rounds of the Misty scheme. Misty schemes are important from a practical point of view since for example, the Kasumi algorithm base...
متن کاملGorenstein syzygy modules
Article history: Received 26 March 2009 Available online 23 October 2010 Communicated by Efim Zelmanov MSC: 16E05 16E10
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ژورنال
عنوان ژورنال: Journal of Pure and Applied Algebra
سال: 2007
ISSN: 0022-4049
DOI: 10.1016/j.jpaa.2006.03.021