Sentence examples similar to problems concerning existence from inspiring English sources

Elliptic problems concerning the existence of positive solutions for equations and systems of equations related to Dirichlet problems have been studied in several papers during the last decades.

Many authors have focused on this problem for the last two decades and several results concerning existence, decay and blow-up have been obtained, see [1 28] and the reference therein.

The next theorem generalizes the main results in [7, 12 14] concerning existence of solutions of singular problems of the type of (1.1).

This type of problem have been considered by many authors and several results concerning existence, nonexistence, and asymptotic behavior have been established.

In this paper we establish new results concerning existence and behavior at infinity of solutions for the nonlinear quasilinear problem.

Problems of this type arise in material science and physics, which have been extensively studied and several results concerning existence, regularity and asymptotic behavior have been established.

Among the ontological problems problems concerning existence and existential assumptions arising in logic are those of individuation and existence.

A number of authors study the problem concerning the existence of fixed points and best proximity points in b-metric space; see e.g. Berinde [16], Boriceanu et al. [17, 18], Bota et al. [19] and many others.

In this section, we show that the problem concerning the existence of common fixed points of R-subcommuting maps on sets not necessarily convex or compact in locally convex spaces has a solution.

A basic problem concerning predator-prey model is the existence and uniqueness of global positive solutions.

The second part of Hilbert's sixteenth problem concerned with the existence and number of the limit cycles for planer polynomial differential equations of degree n.