
The authors are concerned with determining values of \(\lambda\) (eigenvalues), for which there exist positive solutions of the boundary value problem \[ (1_\lambda)\quad u''+\lambda a(t)f(u)=0,\;0
Krasnosel'skij fixed point theorem, Sturm-Liouville theory, positive solutions, Nonlinear boundary value problems for ordinary differential equations, Green function, Green's functions for ordinary differential equations, boundary value problem, Applied Mathematics, eigenvalue problem, Eigenvalues, estimation of eigenvalues, upper and lower bounds of ordinary differential operators, Analysis
Krasnosel'skij fixed point theorem, Sturm-Liouville theory, positive solutions, Nonlinear boundary value problems for ordinary differential equations, Green function, Green's functions for ordinary differential equations, boundary value problem, Applied Mathematics, eigenvalue problem, Eigenvalues, estimation of eigenvalues, upper and lower bounds of ordinary differential operators, Analysis
| citations This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | 147 | |
| popularity This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network. | Top 10% | |
| influence This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically). | Top 1% | |
| impulse This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network. | Top 10% |
