Results 51 to 60 of about 192 (65)

Limit cycles of linear vectors on manifolds [PDF]

open access: yes, 2016
Agraïments: The second author is partially supported by NNSF of China grant number 11271252, by RFDP of Higher Education of China grant number 20110073110054, and by innovation program of Shanghai municipal education commission grant 15ZZ012.It is well ...
Llibre, Jaume, Zhang, Xiang
core   +1 more source

Periodic solutions of periodically perturbed planar autonomous systems: A topological approach

open access: yes, 2006
Aim of this paper is to investigate the existence of periodic solutions of a nonlinear planar autonomous system having a limit cycle x_0 of least period T_0>0 when it is perturbed by a small parameter, T_1-periodic, perturbation. In the case when T_0/T_1
Kamenskii, Mikhail   +2 more
core  

Genetic diversity and drug susceptibility of Mycobacterium tuberculosis in a city with a high prevalence of drug resistant tuberculosis from Southeast of Mexico. [PDF]

open access: yesBMC Infect Dis, 2021
Zenteno-Cuevas R   +9 more
europepmc   +1 more source

Existence of positive solutions in the superlinear case via coincidence degree: the Neumann and the periodic boundary value problems

open access: yes, 2015
We prove the existence of positive periodic solutions for the second order nonlinear equation $u" + a(x) g(u) = 0$, where $g(u)$ has superlinear growth at zero and at infinity. The weight function $a(x)$ is allowed to change its sign.
Feltrin, Guglielmo, Zanolin, Fabio
core  

General equilibrium and fixed point theory : a partial survey [PDF]

open access: yes
Focusing mainly on equilibrium existence results, this paper emphasizes the role of fixed point theorems in the development of general equilibrium theory, as well for its standard definition as for some of its extensions.Fixed point, equilibrium ...
Hichem Ben-El-Mechaiekh   +2 more
core  

Equivariant Morse equation

open access: yesOpen Mathematics, 2012
Styborski Marcin
doaj   +1 more source

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