Results 131 to 140 of about 3,603,035 (255)

Solving the quartic by conics

open access: yesOpen Mathematics
Two conic sections C1{C}_{1} and C2{C}_{2} in the Euclidean plane that pass through two given points can generally have two further points of intersection. It is shown how these can be constructed using compass and ruler.
Halbeisen Lorenz, Hungerbühler Norbert
doaj   +1 more source

TBA equations and resurgent Quantum Mechanics

open access: yesJournal of High Energy Physics, 2019
We derive a system of TBA equations governing the exact WKB periods in one-dimensional Quantum Mechanics with arbitrary polynomial potentials. These equations provide a generalization of the ODE/IM correspondence, and they can be regarded as the solution
Katsushi Ito   +2 more
doaj   +1 more source

Sequential Outlier Detection in Nonstationary Time Series

open access: yesJournal of Time Series Analysis, EarlyView.
ABSTRACT A novel method for sequential outlier detection in nonstationary time series is proposed. The method tests the null hypothesis of “no outlier” at each time point, addressing the multiple testing problem by bounding the error probability of successive tests, using extreme‐value theory. The asymptotic properties of the test statistic are studied
Florian Heinrichs   +2 more
wiley   +1 more source

Alternative approaches to dryland reclamation enhance vegetation cover and soil stability at a former uranium mine

open access: yesRestoration Ecology, EarlyView.
Abstract Introduction Conventional reclamation methods to recover dryland ecosystems after mineral extraction often have low success. Alternative reclamation techniques may help overcome the many challenges to establishing persistent native vegetation and stable soils.
Kathryn D. Eckhoff   +5 more
wiley   +1 more source

A novel Tschirnhaus method to get only the true solutions of quartic equations [PDF]

open access: yes, 2018
The traditional Tschirnhaus method for solving quartic equations pro- duces false solutions along with true solutions, without offering any clue to identify the true solutions. Thus the true solutions have to be picked by trial and error only.
Kulkarni, Raghavendra
core  

Extracellular ionic concentration modulates arrhythmias in a simulated population of human ventricular myocytes with long QT syndrome type 3

open access: yesThe Journal of Physiology, EarlyView.
Abstract figure legend Schematic illustrating the in silico study pipeline. A total of 50,000 virtual myocytes were generated, which were then filtered to 7093 myocytes that fit experimentally constrained biomarkers for physiological electrical and calcium behaviour under wild‐type conditions.
Katherine Flannery   +3 more
wiley   +1 more source

BERNOULLI QUARTIC GENERATION BY AN ORIGINAL [PDF]

open access: yesFiabilitate şi Durabilitate, 2013
The paper is based on a geometrical method for generating Bernoulli Quartic anddesign a mechanism that can generate it. The found mechanism is R-RTT-RTR - Triad of order 3.The analytical equations are obtained through the outlines method and the desired ...
Iulian POPESCU, Mirela CHERCIU
doaj  

Rational points on even‐dimensional Fermat cubics

open access: yesTransactions of the London Mathematical Society, Volume 13, Issue 1, December 2026.
Abstract We show that even‐dimensional Fermat cubic hypersurfaces are rational over any field of characteristic not equal to three, by constructing explicit rational parameterizations with polynomials of low degree. As a byproduct of our rationality constructions, we obtain estimates for the number of their rational points over a number field and ...
Alex Massarenti
wiley   +1 more source

On the solutions of a family of quartic Thue equations [PDF]

open access: yes, 1989
. In this paper, we solve a certain family of diophantine equations associated with a family of cyclic quartic number fields. In fact, we prove that for n ≤ 5 × 106 and n ≥ N =1.191 × 1019,withn, n +2,n2 + 4 square-free, the Thue equation Φn(x, y) =x 4 −
Alain Togbé
core  

Signed Projective Cubes, a Homomorphism Point of View

open access: yesJournal of Graph Theory, Volume 113, Issue 1, Page 38-56, September 2026.
ABSTRACT The (signed) projective cubes, as a special class of graphs closely related to the hypercubes, are on the crossroad of geometry, algebra, discrete mathematics and linear algebra. Defined as Cayley graphs on binary groups, they represent basic linear dependencies.
Meirun Chen   +2 more
wiley   +1 more source

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