Resonance and non-resonance in terms of average values. II

2001 ◽  
Vol 131 (5) ◽  
pp. 1217-1235
Author(s):  
M. N. Nkashama ◽  
S. B. Robinson
Keyword(s):  
Differential Equation ◽  
Ordinary Differential Equation ◽  
Nonlinear Term ◽  
Spectral Gap ◽  
Elliptic Boundary ◽  
Sufficient Conditions ◽  
Existence Results ◽  
Elliptic Boundary Value ◽  
Semilinear Elliptic ◽  
The Given

We prove existence results for semilinear elliptic boundary-value problems in both the resonance and non-resonance cases. What sets our results apart is that we impose sufficient conditions for solvability in terms of the (asymptotic) average values of the nonlinearities, thus allowing the nonlinear term to have significant oscillations outside the given spectral gap as long as it remains within the interval on the average in some sense. This work generalizes the results of a previous paper, which dealt exclusively with the ordinary differential equation (ODE) case and relied on ODE techniques.

Computation of critical groups in elliptic boundary-value problems where the asymptotic limits may not exist

2001 ◽  
Vol 131 (3) ◽  
pp. 721-732 ◽  
Author(s):  
Shujie Li ◽  
Kanishka Perera ◽  
Jiabao Su
Keyword(s):  
Boundary Value Problems ◽  
Nonlinear Term ◽  
Elliptic Boundary ◽  
Boundary Value ◽  
Existence Results ◽  
Elliptic Boundary Value Problems ◽  
Critical Groups ◽  
Elliptic Boundary Value ◽  
Semilinear Elliptic

We compute critical groups in semilinear elliptic boundary-value problems in which the nonlinear term may fail to have asymptotic limits at zero and at infinity. As applications, we prove several new existence results.

Computation of critical groups in elliptic boundary-value problems where the asymptotic limits may not exist

2001 ◽  
Vol 131 (3) ◽  
pp. 721-732
Author(s):  
Shujie Li ◽  
Kanishka Perera ◽  
Jiabao Su
Keyword(s):  
Boundary Value Problems ◽  
Nonlinear Term ◽  
Elliptic Boundary ◽  
Boundary Value ◽  
Existence Results ◽  
Elliptic Boundary Value Problems ◽  
Critical Groups ◽  
Elliptic Boundary Value ◽  
Semilinear Elliptic

We compute critical groups in semilinear elliptic boundary-value problems in which the nonlinear term may fail to have asymptotic limits at zero and at infinity. As applications, we prove several new existence results.

scholarly journals Semilinear elliptic equations having asymptotic limits at zero and infinity

1999 ◽  
Vol 4 (4) ◽  
pp. 231-242 ◽  
Author(s):  
Kanishka Perera ◽  
Martin Schechter
Keyword(s):  
Boundary Value Problems ◽  
Elliptic Equations ◽  
Nonlinear Term ◽  
Elliptic Boundary ◽  
Boundary Value ◽  
Elliptic Boundary Value Problems ◽  
Semilinear Elliptic Equations ◽  
Nontrivial Solutions ◽  
Elliptic Boundary Value ◽  
Semilinear Elliptic

We obtain nontrivial solutions for semilinear elliptic boundary value problems having resonance both at zero and at infinity, when the nonlinear term has asymptotic limits.

scholarly journals Fixed Point Theorems for Generalized αs-ψ-Contractions with Applications

2018 ◽  
Vol 2018 ◽  
pp. 1-10
Author(s):  
Zhenhua Ma ◽  
Muhammad Nazam ◽  
Sami Ullah Khan ◽  
Xiangling Li
Keyword(s):  
Fixed Point ◽  
Boundary Value Problems ◽  
Common Fixed Point ◽  
Metric Space ◽  
Fixed Point Theorems ◽  
Elliptic Boundary ◽  
Sufficient Conditions ◽  
Elliptic Boundary Value Problems ◽  
Elliptic Boundary Value ◽  
Unique Common Fixed Point

We study the sufficient conditions for the existence of a unique common fixed point of generalized αs-ψ-Geraghty contractions in an αs-complete partial b-metric space. We give an example in support of our findings. Our work generalizes many existing results in the literature. As an application of our findings we demonstrate the existence of the solution of the system of elliptic boundary value problems.

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