Results 1 to 10 of about 1,017,506 (258)

Unsteady Heat Transfer In a Gas Mixture [PDF]

open access: yesMATEC Web of Conferences, 2016
The time-dependent problem of heat transfer between two parallel plates in a binary gas mixture was investigated on the basis of numerical solution of BGK type kinetic model equation with collision integral taken in the form of McCormack model.
Polikarpov Alexey   +2 more
doaj   +2 more sources

A relative integral basis over ℚ(−3) for the normal closure of a pure cubic field [PDF]

open access: yesInternational Journal of Mathematics and Mathematical Sciences, 2003
Let K be a pure cubic field. Let L be the normal closure of K. A relative integral basis (RIB) for L over is given. This RIB simplifies and completes the one given by Haghighi (1986).
Blair K. Spearman, Kenneth S. Williams
doaj   +2 more sources

How far is an extension of p-adic fields from having a normal integral basis? [PDF]

open access: yesJournal of Number Theory, 2022
Let $L/K$ be a finite Galois extension of $p$-adic fields with group $G$. It is well-known that $\mathcal{O}_L$ contains a free $\mathcal{O}_K[G]$-submodule of finite index. We study the minimal index of such a free submodule, and determine it exactly in several cases, including for any cyclic extension of degree $p$ of $p$-adic fields.
Del Corso I., Ferri F., Lombardo D.
openaire   +5 more sources

Normal integral basis and ray class group modulo 4

open access: yesProceedings of the Japan Academy, Series A, Mathematical Sciences, 2003
Let \(K\) be a number field. In this note, the question is: under what condition(s) does (do) the following property hold for \(K\): For any tame abelian extensions \(N_1\) and \(N_2\) over \(K\) of exponent 2, the compositum \(N_1N_2/K\) has a relative normal integral basis (NIB) if both \(N_1/K\) and \(N_2/K\) have a NIB? The answer of the authors is:
Ichimura, Humio, Kawamoto, Fuminori
openaire   +5 more sources

MULTICRITERION SYNTHESIS OF INTELLIGENT CONTROL SYSTEMS OF GENERATING UNIT OF NUCLEAR POWER STATION [PDF]

open access: yesInternational Journal of Industrial Engineering and Production Research, 2014
The paper is devoted to solution of some problems in nuclear power station generating unit intellectual control systems using genetic algorithms on the basis of control system model development, optimizations methods of their direct quality indices and ...
Seyed Mojtaba Jafari Henjani   +1 more
doaj   +2 more sources

Note on Galois descent of a normal integral basis of acyclic extension of degree p

open access: yesProceedings of the Japan Academy, Series A, Mathematical Sciences, 2009
Let \(p\) be an odd prime, \(F\) an algebraic number field which is unramified at \(p\), and \(K = F(\zeta_p)\). In this note it is shown that for any tame Galois extension \(N/F\) with \([N:F]=p\) one has: \(N/F\) has a normal integral basis if and only if \(NK/K\) has a normal integral basis.
openaire   +5 more sources

A normal integral basis Theorem

open access: yesJournal of Algebra, 1980
Let K be a number field of class number one and let L be a tame cyclic extension of K of prime power degree. Put G = G(L/K) and pm = #G, where p is a prime number. Let K’ be a finite extension of K, containing the pm th roots of unity, which is disjoint from L over K and such that the . . . discrtmmants D,,, and D,,, are relatively prime.
openaire   +3 more sources

Design of Cooperative Guidance Law Considering Missile Field-of-View Constraint and Impact Point Attitude Constraint [PDF]

open access: yesHangkong bingqi, 2023
Aiming at the problem of limited field-of-view of air-to-air missile during cooperative attack, a cooperative guidance law with field-of-view angle and impact point attitude constraints is proposed.
Wang Shuhan, Cui Hao, Xu Yanke, Guo Zhengyu
doaj   +1 more source

Integral Cryptanalysis Using Algebraic Transition Matrices

open access: yesIACR Transactions on Symmetric Cryptology, 2023
In this work we introduce algebraic transition matrices as the basis for a new approach to integral cryptanalysis that unifies monomial trails (Hu et al., Asiacrypt 2020) and parity sets (Boura and Canteaut, Crypto 2016).
Tim Beyne, Michiel Verbauwhede
doaj   +1 more source

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