Results 1 to 10 of about 13,192 (150)

Necessary and sufficient conditions for the existence of invariant algebraic curves

open access: yesElectronic Journal of Qualitative Theory of Differential Equations, 2021
We present a set of conditions enabling a polynomial system of ordinary differential equations in the plane to have invariant algebraic curves. These conditions are necessary and sufficient. Our main tools include factorizations over the field of Puiseux
Maria Demina
doaj   +1 more source

Expand-and-Randomize: An Algebraic Approach to Secure Computation

open access: yesEntropy, 2021
We consider the secure computation problem in a minimal model, where Alice and Bob each holds an input and wish to securely compute a function of their inputs at Carol without revealing any additional information about the inputs. For this minimal secure
Yizhou Zhao, Hua Sun
doaj   +1 more source

Pseudo-algebraically closed fields over rational function fields [PDF]

open access: yesProceedings of the American Mathematical Society, 1983
The following theorem is proved: Let T T be an uncountable set of algebraically independent elements over a field K 0 {K_0} . Then K = K 0 ( T ) K = {K_0}(T) is a Hilbertian ...
Jarden, Moshe, Shelah, Saharon
openaire   +1 more source

On Hyperbolic Complex Numbers

open access: yesApplied Sciences, 2022
For dimensions two, three and four, we derive hyperbolic complex algebraic structures on the basis of suitably defined vector products and powers which allow in a standard way a series definitions of the hyperbolic vector exponential function.
Wolf-Dieter Richter
doaj   +1 more source

Computational modeling and analysis for the effect of magnetic field on rotating stretched disk flow with heat transfer

open access: yesPropulsion and Power Research, 2021
Time-dependent viscous fluid flow due to a stretchable rotating disk is investigated. Magnetic field is applied in vertical direction to the disk. Temperature equation is assisted with Joule heating effect.
Salman Ahmad   +4 more
doaj   +1 more source

Correction of distortion in flattened representations of the cortical surface allows prediction of V1-V3 functional organization from anatomy. [PDF]

open access: yesPLoS Computational Biology, 2014
Several domains of neuroscience offer map-like models that link location on the cortical surface to properties of sensory representation. Within cortical visual areas V1, V2, and V3, algebraic transformations can relate position in the visual field to ...
Noah C Benson   +3 more
doaj   +1 more source

Constructing Odd-Variable Rotation Symmetric Boolean Functions With Optimal AI and Higher Nonlinearity

open access: yesIEEE Access, 2019
As a part of the field of cryptography, rotation symmetric Boolean functions have rich cryptographic significance. In this paper, based on the knowledge of integer compositions, we present a new construction of odd-variable rotation symmetric Boolean ...
Yindong Chen   +3 more
doaj   +1 more source

A Medical Image Segmentation Method With Anti-Noise and Bias-Field Correction

open access: yesIEEE Access, 2020
Brain magnetic resonance images (MRI) are affected by noise and bias field, which make the traditional FCM algorithm unable to segment tissue regions of MR images accurately.
Hong Xu   +4 more
doaj   +1 more source

ALGEBRAIC DIVISIBILITY SEQUENCES OVER FUNCTION FIELDS [PDF]

open access: yesJournal of the Australian Mathematical Society, 2012
AbstractIn this note we study the existence of primes and of primitive divisors in function field analogues of classical divisibility sequences. Under various hypotheses, we prove that Lucas sequences and elliptic divisibility sequences over function fields defined over number fields contain infinitely many irreducible elements.
Ingram, P.   +4 more
openaire   +5 more sources

Asymptotic distribution of traces of singular moduli

open access: yesDiscrete Analysis, 2022
Asymptotic distribution of traces of singular moduli, Discrete Analysis 2022:4, 14 pp. This paper concerns the modular $j$-function, a famous function that is fundamental to algebraic number theory and has remarkable connections to other areas of ...
Nickolas Andersen, William Duke
doaj   +1 more source

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