Results 11 to 20 of about 1,393,313 (319)
Colloquium Mathematicum, 2003 A ring is an \(E\)-ring if every endomorphism of its additive group is multiplication by a ring element. A ring is an \(A\)-ring if every automorphism of its additive group is multiplication by a ring element. While every \(E\)-ring is obviously an \(A\)-ring, the authors construct an \(A\)-ring which is not an \(E\)-ring. However, they conjecture that
Dugas, Manfred, Feigelstock, Shalom
openaire +2 more sources
Ring-LWE in Polynomial Rings [PDF]
, 2012 The Ring-LWE problem, introduced by Lyubashevsky, Peikert, and Regev (Eurocrypt 2010), has been steadily finding many uses in numerous cryptographic applications. Still, the Ring-LWE problem defined in [LPR10] involves the fractional ideal R ∨, the dual of the ring R , which is the source of many theoretical and implementation technicalities. Until now,
Ducas, Léo, Durmus, Alain
openaire +3 more sources
Route to Chaos in a Unidirectional Ring of Three Diffusively Coupled Erbium-Doped Fiber Lasers
Photonics, 2023 We numerically investigate the dynamics of a ring consisting of three unidirectionally coupled Erbium-Doped Fiber Lasers (EDLFs) without external pump modulation.
José Octavio Esqueda de la Torre +5 more
doaj +1 more source
Morita contexts and unitary ideals of rings [PDF]
Proceedings of the Estonian Academy of Sciences, 2021 In this paper we study Morita contexts between rings without identity. We prove that if two associative rings are connected by a Morita context with surjective mappings, then these rings have isomorphic quantales of unitary ideals.
Kristo Väljako, Valdis Laan
doaj +1 more source
Mathematical Model of Piston Ring Sealing in Combustion Engine
Polish Maritime Research, 2015 This paper presents a mathematical model of piston-rings-cylinder sealing (TPC) of a combustion engine. The developed model is an itegrated model of gas flow through gaps in TPC unit, displacements and twisting motions of piston rings in ring grooves as ...
Koszałka Grzegorz, Guzik Mirosław
doaj +1 more source
Energy Losses Related to Ring Pack Wear in Gasoline Car Engine
Energies, 2022 Decreasing production and rising prices of cars, especially those with electric drive, lead to longer use of cars with internal combustion engines. It can be assumed that in the future, more and more cars powered by such engines with high mileage and ...
Grzegorz Koszalka, Paweł Krzaczek
doaj +1 more source
Rings of rings: calixpyrrole cyclotrimers
Arkivoc, 2021 Los calixpirroles son una clase de heteromacrociclos que han sido un tema de considerable interés en las últimas dos décadas debido a su rica química huésped-huésped como receptores de aniones. Se han informado varias estructuras que comprenden más de una unidad de calixpirrol como receptores multitópicos y multivalentes.
Rakia Saidi +4 more
openaire +2 more sources
Journal of Education, Health and Sport, 2019 Cerebral palsy is a broad term, including various, changing with age movement and postural disorders of cerebral origin [1]. Gait of children suffering from cerebral palsy is characterized by changeability.
Monika Stecko +7 more
doaj +1 more source
Energies, 2022 Pollutant emission standards and, in particular, those concerning particles from an internal combustion engine (ICE) are becoming increasingly restrictive.
Vincent Berthome +2 more
doaj +1 more source
On Linear Coding over Finite Rings and Applications to Computing
Entropy, 2017 This paper presents a coding theorem for linear coding over finite rings, in the setting of the Slepian–Wolf source coding problem. This theorem covers corresponding achievability theorems of Elias (IRE Conv. Rec. 1955, 3, 37–46) and Csiszár (IEEE Trans.
Sheng Huang, Mikael Skoglund
doaj +1 more source