Results 91 to 100 of about 185,528 (178)

Center conditions for a cubic differential system with one invariant straight line

, 2019
Se determină condițiile de existență a centrului pentru un sistem diferențial cubic cu punctul singular O0,0 de tip centru sau focar ce posedă o dreaptă invariantă.
Cozma, D.V., Cozma, D., Matei, A.
openaire   +1 more source

Cubic differential systems with invariant straight lines of total multiplicity seven and four real distinct infinite singularities

Electronic Journal of Differential Equations, 2021
Cristina Bujac, Dana Schlomiuk, Nicolae Vulpe   +2 more
doaj  

Cubic systems with seven invariant straight lines of configuration 3, 3, 1

, 2012
We classify all cubic differential systems with exactly seven invariant straight lines taking into account their parallel multiplicity which form a configuration of type 3, 3, 1. We prove that there are six different topological classes of such systems. For every class we carried out the qualitative investigation on the Poincar´e disc.
Şubă, A.S., Repeşco, V.F., Puţuntică, V.M.   +2 more
openaire   +1 more source

Darboux Integrability of a Cubic Differential System with One Invariant Straight Line and One Invariant Cubic

We find conditions for a singular point O0; 0 of a center or a focus type to be a center, in a cubic differential system with one invariant straight line and one invariant cubic. The presence of a center at O0; 0 is proved by method of Darboux integrability.
Cozma, D.V., Cozma, D., Matei, A.
openaire   +1 more source

Integrability conditions for a cubic differential system with two invariant straight lines and one invariant cubic

, 2018
We find conditions for a singular point O0; 0 of a center or a focus type to be a center, in a cubic differential system with two invariant straight lines and one invariant cubic. The presence of a center at O0; 0 is proved by constructing Darboux first integrals.
openaire   +1 more source

Center problem for cubic systems with a bundle of two invariant straight lines and one invariant conic

, 2012
For cubic differential systems with a bundle of two invariant straight linesand one invariant conic it is proved that a weak focus is a center if and only if thefirst four Liapunov quantities Lj , j = 1, 4, vanish.
Cozma, D.V., Cozma, D.
openaire   +1 more source

Computing the bridge length: the key ingredient in a continuous isometry classification of periodic point sets. [PDF]

Acta Crystallogr A Found Adv
McManus J, Kurlin V.
europepmc   +1 more source

Center conditions for a cubic differential system with two invariant straight lines and one invariant elliptic curve

, 2017
Pentru un sistem diferenţial cubic cu punct singular de tip centru sau focar, care posedă două drepte invariante şi o cubică invariantă de tip eliptic, s-a demonstrat că punctul singular este de tip centru dacă şi numai dacă primele două mărimi Lyapunov în acest punct se anulează.
Cozma, D.V., Cozma, D., Matei, A.
openaire   +1 more source

Independent Encoding of Orientation and Mean Luminance by Mouse Visual Cortex. [PDF]

eNeuro
O'Shea RT, Wei XX, Priebe NJ.
europepmc   +1 more source

sEMG-Based Muscle Synergy Analysis and Functional Driving Ratio for Quantitative Assessment During Robot-Assisted Upper-Limb Rehabilitation. [PDF]

Sensors (Basel)
Tan B, Shao J, Xu Q, Li S, Yu H.
europepmc   +1 more source